🔧 Balboa Vico Ultimax Spa Pump — 4.0 HP 2-Speed 230V 56-Frame 2.5″ × 2″ Side Discharge (5239212-S)

High-performance jet pump with oversized 2.5″ suction for maximum flow in demanding spa systems

📋 Product Overview

The Balboa Vico Ultimax 5239212-S is a 4.0 HP (3.0 HP operational) dual-speed, 230V/60Hz jet pump featuring an oversized 2-1/2″ suction intake combined with a 2″ side discharge — specifically designed for spa systems that require larger suction plumbing for higher water volume and reduced flow restriction. Drawing 12.0 amps on high speed and 3.5 amps on low speed, this compact 56-frame pump shares the same proven motor platform as the standard 2″ × 2″ Ultimax (5235212-S) but pairs it with a larger wet end to accommodate 2-1/2″ suction plumbing as used in Maax and Coleman spa brands, among others. The Ultimax wet end delivers flow rates exceeding 325 GPM with multi-directional volute mounting that rotates in 90-degree increments, allowing the side discharge to be positioned in any direction to match your existing plumbing configuration. All seals are carbon ceramic with Viton elastomers — engineered to endure prolonged heat and chemical exposure for long-lasting performance. Safety features include built-in auto motor overheat shut-off protection, while a drain plug allows complete draining for winterization. Suction and discharge nipples provide side-stream flow connections for ozonator venturi injection. This pump ships without a cord or tailpieces — reuse your existing pump cord or purchase separately with the correct connector for your spa pack controller. Manufactured by Balboa Water Group in Tustin, California — the world’s largest manufacturer of electronic control systems and components for the spa and hot tub industry. The 5239212-S is the 2.5″ suction variant of the Vico Ultimax platform, serving as an updated replacement for older Balboa/Vico pump designations.

✨ Key Features

✅ 4.0 HP Dual Speed — 230V/60Hz — High speed (12.0A) for powerful multi-jet hydrotherapy and low speed (3.5A) for quiet filtration and circulation

✅ Oversized 2-1/2″ Suction Intake — Larger suction port for increased water volume and reduced flow restriction compared to standard 2″ × 2″ models

✅ Flow Rates Exceeding 325 GPM — Ultimax wet end hydraulics deliver industry-leading flow for maximum jet power in high-demand spa systems

✅ 56-Frame Motor (56Y) — Compact, cool-running design for reliable high-output performance

✅ 2″ Side Discharge MBT — Standard 2″ Male Buttress Thread discharge for compatibility with most spa plumbing systems

✅ Multi-Direction Volute Mounting — Wet end rotates in 90-degree increments to accommodate any spa plumbing configuration

✅ Carbon Ceramic Seal with Viton Elastomers — Superior seal technology for long-lasting performance under prolonged heat and chemical exposure

✅ Auto Motor Overheat Protection — Built-in shut-off prevents motor damage from overheating

✅ Drain Plug Included — Allows complete pump body draining for winterization and hygienic storage, also prevents freeze damage

✅ Ozonator Venturi Ports — Suction and discharge nipples for side-stream flow connections (ozone injection)

✅ Whisper-Quiet Operation — Energy-efficient motor and hydraulic design meets and exceeds the most strict municipal noise requirements

✅ Versatile Wiring — 2-speed pump can also be wired for single-speed (high speed only) operation to replace 1-speed pumps

⚙️ Technical Specifications

Specification	Value
Manufacturer	Balboa Water Group (Tustin, California, USA)
Brand	Vico Ultimax (formerly Vico Niagara / Ultrajet Ultimax)
Part Number	5239212-S
Pump Type	Jet Pump — Side Discharge
Horsepower	4.0 HP
Horsepower (Operational)	3.0 HP
Speed Settings	2-Speed (Dual Speed) — can be wired single-speed
Voltage	230V (220-240V)
Frequency	60 Hz
High Speed Amperage	12.0 Amps
Low Speed Amperage	3.5 Amps
Flow Rate (Wet End Capacity)	Exceeding 325 GPM
Frame Type	56 Frame (56Y)
Discharge Type	Side Discharge
Discharge Size	2″ MBT (Male Buttress Thread)
Suction Size	2-1/2″ MBT (Male Buttress Thread)
Suction Style	Center
Connection Type	Male Buttress Thread (MBT) — both suction and discharge
Volute Mounting	Multi-directional — rotatable in 90-degree increments
Seal Type	Carbon ceramic with Viton elastomers
Thermal Protection	Built-in auto motor overheat shut-off
Drain Plug	Yes — for winterization and hygienic storage
Ozonator Ports	Suction and discharge nipples for side-stream flow
Cord	NOT INCLUDED — reuse existing or purchase separately
Tailpieces/Unions	NOT INCLUDED (per Parts4Tubs)
Warranty	1 Year Manufacturer Warranty

🔌 Electrical Requirements

Electrical Spec	Requirement
Supply Voltage	230V (220-240V)
Frequency	60 Hz
Phase	Single Phase
High Speed Amperage	12.0 A
Low Speed Amperage	3.5 A
Thermal Protection	Built-in auto overheat shut-off
Cord	NOT INCLUDED — reuse existing or purchase new

⚠️ IMPORTANT ELECTRICAL SAFETY:

All electrical installations must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and local building codes. This 230V pump must be connected to a supply circuit protected by a Ground-Fault Circuit Interrupter (GFCI). A dedicated circuit is required — do not share with other appliances. This pump is normally directly wired to the receptacle of the spa pack controller. Save your old pump’s cord so you have the correct connector.

💡 Wiring Note: This 2-speed pump can also replace any single 1-speed pump of equivalent amperage. Wire only the high-speed terminal for single-speed operation.

🔗 Compatibility Guide

Port & Frame Configuration

Specification	Detail
Frame	56 Frame (56Y)
Suction	2-1/2″ MBT (Center) — OVERSIZED
Discharge	2″ MBT (Side)
Volute	Multi-directional — rotatable in 90° increments
Drain Plug	Yes
Ozonator Ports	Side-stream nipples on suction and discharge

5239212-S vs 5235212-S — CRITICAL DIFFERENCE

Feature	5239212-S (THIS PUMP)	5235212-S
Suction Size	2-1/2″ MBT	2″ MBT
Discharge Size	2″ MBT (Side)	2″ MBT (Side)
Configuration	2.5″ In / 2″ Out	2″ In / 2″ Out
Motor	Same — 12.0/3.5A, 230V, 56-Frame	Same
HP	Same — 4.0 HP (3.0 HP operational)	Same
Use Case	Spas requiring larger suction (Maax, Coleman, etc.)	Standard 2″ plumbing spas

⚠️ The only difference between these two pumps is the suction port size (wet end). They share the identical motor. If your existing pump has 2-1/2″ suction plumbing, you need THIS pump (5239212-S). If both suction and discharge connections are 2″, you need the 5235212-S.

Plumbing Thread Measurement Guide

Measure the outside diameter of the threaded connection on your existing pump to determine plumbing size:

Outside Thread Measurement	Actual Port Size
Approximately 2-3/8″ to 2-7/16″	1-1/2″ connection
Approximately 3-1/16″ (3.1″)	2″ connection
Approximately 3-5/8″	2-1/2″ connection — THIS PUMP SUCTION

OEM Spa Brand Applications

Brand	Details	Source
Maax Spas	Pool-Spa-Supplies lists 103698 as Maax/Coleman P/N for this plumbing configuration	Pool-Spa-Supplies
Coleman Spas	Pool-Spa-Supplies lists 103698 as Maax/Coleman P/N for this plumbing configuration	Pool-Spa-Supplies

⚠️ 103698 Cross-Reference Note: Pool-Spa-Supplies lists Maax/Coleman part number 103698 in association with the 5239212-S. However, HotTubOutpost lists 103698 separately as a 2.5 HP, 8.8/3A pump — a different HP and amperage rating than the 5239212-S (4.0 HP, 12.0/3.5A). Both share the 2.5″ × 2″ wet end configuration for Coleman/Maax spas, but they are different HP pump assemblies. The 5239212-S is the higher-power version. Verify your original pump’s amperage to ensure correct replacement.

Coleman Spa Models Using 2.5″ Suction Ultimax Pumps (from HotTubOutpost)

The following Coleman spa models used Vico Ultimax pumps with 2.5″ × 2″ plumbing (verify your specific model’s HP/amp requirement):

2002: 509, 547, 548, 550, 555, 605, 705TL, 706TL | 2003 Deluxe: 361, 470, 471, 472 | 2003 Base: 461 | 2003 Aeromaax: 470, 471, 472, 605, 705, 706 | 2004 Deluxe: 351, 361, 470, 471, 472 | 2004 Base: 461 | 2004 Aeromaax: 470, 471, 472, 705, 706 | 2005 Deluxe: 351, 361, 470, 471, 472 | 2005 Base: 461 | 2005 Aeromaax: 470, 471, 472, 705, 706 | 2006-106 Deluxe: 351, 470, 471, 472 | 2006 Base: 461 | 2006 Aeromaax: 470, 471, 472, 705, 706, M6 | 2007 & 2008-106 Deluxe: 351, 470, 471, 472 | 2007 & 2008 Aeromaax: 470, 471, 472, 705, 706, M6

⚠️ This list covers Coleman models that used 2.5″ × 2″ Ultimax pumps generally (including 2.5 HP and 3 HP variants). Not all models used the 4.0 HP / 12.0A version. Always verify your original pump’s amperage label before ordering.

Compatibility Verification Checklist

Before ordering, verify ALL of the following match your existing pump:

1. ⚡ Amperage — must match 12.0A high / 3.5A low at 230V (do NOT exceed your spa pack’s rated pump output)
2. ⚡ Voltage — must be 230V / 60Hz
3. 🔩 Frame — 56 frame
4. 💧 Suction size — must be 2-1/2″ MBT (~3-5/8″ outside thread) — VERIFY THIS FIRST
5. 💧 Discharge size — must be 2″ MBT (~3-1/16″ outside thread) side discharge
6. 🎛️ Speed — 2-speed (or use as single-speed replacement — wire high speed only)

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📐 Alternate Part Numbers

Primary Designations

Part Number	Notes	Source
5239212-S	Current primary Balboa SKU	Parts4Tubs, HotTubOutpost, Pool-Spa-Supplies, SpaParts+Allied
5239212	Base number without suffix	HotTubOutpost
5239212S	Concatenated form (no hyphen)	HotTubOutpost
VIC5239212-S	Vico prefix form	HotTubOutpost
VIC5239212S	Vico prefix concatenated	HotTubOutpost
BB5239212S	Balboa prefix concatenated	HotTubOutpost
BB5239212-S	Balboa prefix form	HotTubOutpost
BAL5239212-S	Balboa alternate prefix	HotTubOutpost

Replaces These Balboa/Vico Part Numbers (per Pool-Spa-Supplies)

Part Number	Notes	Source
1016062	Older Balboa manufacturing P/N	Pool-Spa-Supplies
1016170	Balboa manufacturing P/N	Pool-Spa-Supplies
1016205	Balboa Niagara designation	Pool-Spa-Supplies
903850	Older Balboa/Vico designation	Pool-Spa-Supplies
1016194	Balboa variant	Pool-Spa-Supplies

OEM / Spa Brand Cross-References

Part Number	Brand / Context	Notes	Source
103698	Maax / Coleman Spas	2.5″ × 2″ plumbing configuration for Coleman/Maax — NOTE: 103698 is also listed separately as a 2.5 HP, 8.8/3A pump (different HP). Verify amperage match.	Pool-Spa-Supplies

Related 1-Speed Cross-Reference (from BathParts)

Part Number	HP	Speed	Amps	Notes	Source
1016037	3.0 HP	1-Speed (ships as 2-speed — wire high speed only)	12.0/3.5A	BathParts associates this P/N with 5239212-S	BathParts

Shared Motor Platform — 2″ × 2″ Equivalents (EasySpaParts “Also Known As” for 5235212-S/1016170)

The following part numbers apply to pumps sharing the same motor (12.0/3.5A, 230V, 56-frame) but with the standard 2″ × 2″ wet end (5235212-S). If you need the 2.5″ × 2″ wet end (this pump — 5239212-S), these are for motor-matching reference only:

2-Speed Motor Cross-References: PUUM2302582F, PUM22000927, PUUMC2302582F, PUUMC2302582FJ, PUUMC2302582FR, PUUMS2602582F, PUUMSC2502582FR, PUUMSC2602582F, PUUMSC2602582FDS, 1016014, 1016025, 1016166, 1016167, 1016170, 1016172, 1016173, 1016174, 1016184, 1016194, 1016195, 1016200, 1016205, 1016215, 1016218, 1016230, 1016235, 1016236, 1016280, 1056016, PL342, PL388, PL389, X320527, X320528, X320558, 5235212-S, 5235212-B, 5235212, 5235210

1-Speed Cross-References (wire high speed only): 1016019, 1016024-NHP, 1016026-NHP, 1016178, 1016278, 1015112, 1016020-NHP, 1016205-NHP, X320375

⚠️ IMPORTANT: The above part numbers are confirmed for the 2″ × 2″ wet end version (5235212-S) which shares the same motor. They are NOT direct replacements for the 5239212-S (2.5″ × 2″ wet end) unless you are also replacing the wet end. These are provided for reference when matching motor specifications only.

Complete Vico Ultimax 2.5″ Suction Family (56-Frame, 2-Speed, 230V, 2.5″ In / 2″ Out)

Part Number	HP (Marketed)	Amps (High/Low)	Notes
5239208-S	2.0 HP	8.8/3.0 A	Smaller 2.5″ suction Ultimax
5239210	2.5 HP	10/3.5 A	Mid-range 2.5″ suction Ultimax
5239212-S	4.0 HP	12.0/3.5 A	THIS PRODUCT

Standard 2″ × 2″ Counterpart

Part Number	HP	Suction	Discharge	Notes
5235212-S	4.0 HP (3.0 HP operational)	2″ MBT	2″ MBT (Side)	Same motor, standard 2″ suction — for spas with 2″ × 2″ connections

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🛠️ Installation Requirements

Mounting

Requirement	Specification
Mounting Position	Horizontal — below water level (flooded suction)
Base	Solid, level, vibration-dampening surface
Ventilation	Adequate clearance around motor for cooling airflow
Access	Clearance for maintenance, seal inspection, and wet end rotation

Plumbing

Connection	Size	Notes
Suction	2-1/2″ MBT (Center)	Oversized — connects to 2-1/2″ ID hose/pipe (~3-5/8″ outside thread)
Discharge	2″ MBT (Side)	Standard — connects to 2″ ID hose/pipe (~3-1/16″ outside thread)
Ozonator Ports	Side-stream nipples	On suction and discharge sides for ozone venturi injection

Installation Notes

⚠️ Never run pump dry — always ensure the pump is primed and filled with water before starting. Running dry causes seal damage and motor overheating.

⚠️ Wet End Rotation: The wet end can be rotated in 90-degree increments to align the side discharge with your existing plumbing. The pump ships in the 12 o’clock discharge position. Loosen the volute bolts, rotate to the desired orientation, and retighten securely. See the downloadable “How to Rotate a Pump Wet End” PDF in the Downloads section.

⚠️ No Cord Included: This pump does NOT include a cord or tailpieces. Reuse your existing pump cord with the correct connector for your spa pack. Save your old pump’s cord before removing the old pump.

⚠️ VERIFY SUCTION SIZE BEFORE INSTALLATION: The 2-1/2″ suction on this pump is LARGER than the standard 2″ suction on the 5235212-S. Measure the outside thread diameter on your existing pump’s suction port: approximately 3-5/8″ = 2-1/2″ (this pump), approximately 3-1/16″ = 2″ (you need 5235212-S instead).

⚠️ Mounting Plate Adjustment: If the pump does not completely line up with existing plumbing, remove the mounting plate from the floor of the spa and move it 1/4″ forward or backward so the inlet and discharge plumbing match up.

⚠️ Ensure proper grounding and bonding per NEC requirements. GFCI protection is required by code for all spa and hot tub installations.

💡 Winterization: Use the drain plug to completely drain the pump body during storage to prevent freeze damage.

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🔄 Maintenance Guide

Routine Maintenance

Task	Frequency	Notes
Check for leaks	Monthly	Inspect around seal area, unions, and volute bolts
Inspect plumbing connections	Monthly	Ensure tight fit — no water weeping at suction or discharge
Verify both speeds function	Monthly	Low speed for filtration, high speed for jets
Check amperage draw	Annually	High: ~12.0A, Low: ~3.5A at 230V — should match rating
Inspect motor vents	Quarterly	Keep free of debris and obstructions for cooling
Verify GFCI operation	Monthly	Press test button to confirm proper function
Check drain plug	Before winterization	Ensure it can be removed for complete draining
Inspect ozonator port connections	Quarterly	If used — check for leaks or deterioration
Check mounting bolts and base	Quarterly	Tighten if loose — ensure vibration dampening is intact

Warning Signs — Replace Pump If:

• Unusual noise (grinding, screeching, or humming without rotation)
• Water leaking from the seal area between motor and wet end
• Motor repeatedly trips the circuit breaker or GFCI
• Noticeably reduced water flow or weak jets
• Motor overheating or burning smell
• Motor hums but won’t start (possible capacitor failure)
• Excessive vibration even on solid mounting

Seal Information

Detail	Specification
Seal Type	Carbon ceramic with Viton elastomers
Performance	Engineered for long-lasting performance under prolonged heat and chemical exposure

⚠️ Replace seal at first sign of leakage from between the motor and wet end. Continuing to run a leaking pump will damage the motor bearings and windings.

🎯 Ideal Applications

Application	Suitability	Notes
♨️ Maax / Coleman spa systems with 2.5″ suction	✅ Yes	OEM 2.5″ × 2″ plumbing configuration — verify amp rating matches
♨️ Spas with 2-1/2″ suction plumbing	✅ Yes	Specifically designed for oversized suction applications
♨️ Multi-jet spa systems	✅ Yes	Flow rates exceeding 325 GPM for maximum jet power
♨️ Zone seating / focused therapy	✅ Yes	Ideal for dedicated zone jet pumps in high-demand systems
♨️ Replacement for older Vico Ultimax/Niagara 2.5″ models	✅ Yes	Direct replacement for 1016062, 903850, and related P/Ns at same amperage
♨️ Replacing 1-speed pump (same amperage)	✅ Yes	Wire high speed only for single-speed operation
♨️ Spas with standard 2″ × 2″ plumbing	❌ No	Use 5235212-S instead — this pump has 2-1/2″ suction, NOT compatible with 2″ suction plumbing
🛁 Whirlpool bath	❌ No	Too powerful — bath pumps are typically 48-frame, 115V

❓ Frequently Asked Questions

Q: What is the actual horsepower of this pump? A: This pump is rated at 4.0 HP (with 3.0 HP operational/continuous duty). Always match replacement pumps by amperage (12.0A high / 3.5A low at 230V) rather than HP alone, as HP ratings in the spa industry are not standardized across manufacturers.

Q: What is the difference between 5239212-S and 5235212-S? A: The suction port size is the only difference. The 5239212-S has a 2-1/2″ suction and 2″ discharge (2.5″ In / 2″ Out), while the 5235212-S has 2″ suction and 2″ discharge (2″ In / 2″ Out). They share the same motor (12.0A/3.5A, 230V, 56-frame). Measure your existing pump’s suction thread outside diameter to determine which you need: approximately 3-5/8″ = 2-1/2″ (this pump), approximately 3-1/16″ = 2″ (5235212-S).

Q: Is a cord included? A: No. This pump ships without a cord or tailpieces. Reuse your existing pump cord, or purchase a new one with the correct connector for your spa pack. Save your old pump’s cord before removing the old pump.

Q: Are unions/tailpieces included? A: Per Parts4Tubs listing: No — this pump ships without tailpieces. Purchase unions separately as needed, ensuring you get 2-1/2″ for suction and 2″ for discharge to match this pump’s port sizes.

Q: What size are the ports? A: Suction (center): 2-1/2″ MBT (approximately 3-5/8″ outside thread). Discharge (side): 2″ MBT (approximately 3-1/16″ outside thread).

Q: Can I rotate the discharge direction? A: Yes. The multi-directional volute can be rotated in 90-degree increments to align the side discharge with your existing plumbing. Loosen the volute bolts, rotate, and retighten securely. A downloadable PDF guide is available in the Downloads section.

Q: Which spa brands use this pump? A: This pump uses the 2.5″ × 2″ plumbing configuration found in Maax and Coleman spa systems (Pool-Spa-Supplies reference). Multiple Coleman spa models from 2002-2008 used Vico Ultimax pumps with this plumbing configuration. Always verify your original pump’s amperage label for exact HP match.

Q: Can this replace a single-speed pump? A: Yes. This 2-speed pump can replace any single 1-speed pump with equivalent amperage (12.0A at 230V) by wiring only the high-speed terminal and leaving the low-speed terminal disconnected.

Q: Can I use this pump if my spa has 2″ × 2″ connections? A: No. The 2-1/2″ suction will NOT connect to 2″ suction plumbing. You need the 5235212-S (2″ × 2″) for standard plumbing applications.

Q: What motor brand will I receive? A: Balboa reserves the right to change motor brands without notice. Motors may include US Motors, AO Smith Century, GE, or others. The motor brand can affect exact dimensions and mounting base width. Contact Parts4Tubs to verify the current motor brand if space is very limited.

Q: Does this pump have ozonator connections? A: Yes. The Ultimax wet end includes suction and discharge nipples that allow for side-stream flow, commonly used for ozonator venturi injection.

Q: What warranty is included? A: 1-year manufacturer warranty from Balboa Water Group. Contact Parts4Tubs for full warranty terms.

Q: How do I know if my pump needs replacing? A: Common signs include unusual noise (grinding, screeching), water leaking from the seal area, motor repeatedly tripping the breaker or GFCI, noticeably reduced water flow or weak jets, motor overheating, or the motor humming but not starting.

Q: Do I need a GFCI breaker? A: Yes, GFCI protection is required by the National Electrical Code (NEC) for all hot tub and spa installations.

🏆 Why Choose the Balboa Vico Ultimax 5239212-S

✅ Oversized 2-1/2″ Suction — Increased water volume for superior flow performance in demanding spa systems

✅ 325+ GPM Flow Capacity — Industry-leading wet end hydraulics for maximum jet power

✅ Multi-Direction Volute — Rotatable in 90° increments for flexible plumbing alignment in any configuration

✅ Carbon Ceramic / Viton Seal Technology — Superior chemical and heat resistance for extended seal life

✅ Auto Motor Overheat Protection — Built-in shut-off prevents costly motor damage

✅ Dual-Speed Versatility — High speed for powerful jets and low speed for quiet, energy-efficient filtration

✅ Direct Replacement — For older Balboa/Vico pump designations including 1016062, 903850, 1016170, 1016205, 1016194

✅ Drain Plug & Ozonator Ports — Winterization-ready with built-in ozone venturi capability

✅ Whisper-Quiet Operation — Meets and exceeds strict municipal noise requirements

✅ Made in USA — Manufactured by Balboa Water Group in Tustin, California

🤝 Why Buy From Parts4Tubs

✅ US-based support for American customers

✅ Fast shipping across the United States

✅ Expert advice from spa and hot tub specialists

✅ Competitive pricing

✅ Full warranty support

✅ Hassle-free returns

✅ Compatible pump cords, unions, seals, and replacement parts available

✅ Dedicated customer service team

⭐ Summary

The Balboa Vico Ultimax 5239212-S is a 4.0 HP (3.0 HP operational) dual-speed, 230V/60Hz jet pump drawing 12.0/3.5 amps with a 56-frame (56Y) motor. The key distinguishing feature of this pump is its oversized 2-1/2″ suction combined with 2″ side discharge — specifically designed for spa systems requiring higher suction capacity, including Maax and Coleman spa brands. The Ultimax wet end delivers flow rates exceeding 325 GPM with multi-directional volute mounting (90° increments). Built with carbon ceramic seals with Viton elastomers, auto motor overheat protection, drain plug for winterization, and ozonator venturi ports. Cord and tailpieces not included. Replaces Balboa part numbers 1016062, 1016170, 1016205, 903850, and 1016194. Standard 2″ × 2″ counterpart: 5235212-S. Manufactured by Balboa Water Group in Tustin, California. 1-year manufacturer warranty. Available now at Parts4Tubs with fast US shipping and expert compatibility support.

**PLEASE READ THIS IS IMPORTANT**

When selecting a Balboa Ultimax or Vico Ultimax pump, you must pay careful attention to the wet end. The is the black part on the end of the pump which connects to the plumbing and has the impellor inside.

Balboa have made this pump under various OEM agreements, for the likes of CalSpa amongst others who have then included it in their hot tubs.

Whereas normally with a pump, you can select the voltage, horsepower and frame size, it is a little more difficult with this brand. There are different types of wet end for this model and the discharge (the part that connects to the pipework that flows to your jets) can be in a different position. Normally, you would choose from either side discharge, or center discharge but "helpfully" (not at all!) Balboa has a different offset for the side discharge on this model. THIS IS NOT STANDARD.

If you get this wrong, the part will not fit.

Please take a look at the two different examples below. Both of these are for a 2HP pump but you can see they look totally different. You will also notice that the position of the discharge is roughly 1" different. The one on the left is offset around 2.5" and the one on the right is offset around 1.5".

If you are looking to replace a pump and you need a non-standard wet end, you will need to buy a new pump AND the wet end that you need. Please note, in some cases you will just need to change the Volute (impeller cover)

The standard model comes already fitted to the pump whereas the non-standard model will need to be purchased separately, and you will need to change this over. 

If you are comfortable enough to switch out a pump, changing a wet end over should not be a problem for you.

If you are not sure, please do get in touch.

 

 

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	Magic Plastics Union 0602-15 (1.5″ Pump Union) | 1-1/2″S x 1-1/2″FBT Union, Pump, Magic, 1-1/2"S x 1-1/2"FBT (Industry Standard) w/ O-Ring	$6.36 Max: 575 Min: 1 Step: 1 Add to cart
	Magic Plastics Union 0602-20 (2″ Pump Union) | 2″S x 2″FBT w/ O-Ring Union, Pump, Magic, 2"S x 2"FBT (Industry Standard) w/ O-Ring	$8.00 Max: 501 Min: 1 Step: 1 Add to cart
	Waterway Union 400-6010 | 2-1/2″ Union Nut with 2-1/2″ Slip tailpiece and o-ring (2.5″ union) Union, Pump, Waterway, 2-1/2"FBT x 2-1/2"S	$14.77 Max: 145 Min: 1 Step: 1 Add to cart
	1 Speed Pump / Blower / AMP Cord | 21086 Amp Plug, Pump, 1-Speed, 14/3, 4-Pin, 5' Cord, White	$24.71 Max: 377 Min: 1 Step: 1 Add to cart
	Balboa Amp Plug 21087 (For 2 Speed Pumps) Amp Plug, Pump 1 (2-Speed) 14/4, 72" Long, White	$31.72 Max: 182 Min: 1 Step: 1 Add to cart

Hot Tub Pump Collar & Union Size Chart

Imperial & Metric Specifications

Union Size	Collar Size	Thread OD	Union OD	O-Ring Size
1.5" Female Buttress Thread (FBT)	2.5" / 64mm (Tip to Tip) Measurement	2-1/2" 64mm	2-13/16" 71mm	2-5/16" OD 59mm
2" Female Buttress Thread (FBT)	3.1" / 78mm (Tip to Tip) Measurement	3-1/16" 78mm	3-3/8" 81mm	2-15/16" OD 75mm
2.5" Female Buttress Thread (FBT)	3.6" / 91mm (Tip to Tip) Measurement	3-5/8" 91mm	4-1/4" 108mm	3-7/16" OD 87mm

Important Notes

The union "size" (1.5", 2", 2.5") is nominal and doesn't correspond to any actual measurement.

Collar size is measured from thread tip to thread tip on the pump outlet.

Most hot tub pumps use Female Buttress Thread (FBT) - 98% of applications.

O-ring gaskets may vary between manufacturers - measure your existing gasket for accuracy.

How do I Replace a Hot Tub Pump?

Here's a general step-by-step guide on how to replace a hot tub pump. Keep in mind that the specific steps may vary depending on your hot tub's make and model, so it's essential to consult your hot tub's manual for model-specific instructions. If you're not comfortable with this procedure, it's a good idea to seek professional assistance.

Materials You'll Need:

• Replacement pump
• Pipe wrench
• Adjustable wrench
• Screwdriver
• Pipe sealant (thread tape or plumber's putty)
• PVC primer and cement (if you have PVC plumbing)
• Teflon tape (for threaded connections)

Procedure:

1. Turn Off the Power: Before you begin, ensure the hot tub's power supply is turned off at the circuit breaker or disconnect switch. Safety should always be a priority when working with electrical components.

2. Drain the Hot Tub: If your hot tub is not already empty, you'll need to drain it. Follow your hot tub's manual or manufacturer's instructions for proper draining. (You might not need to do this if you can lock the pump off with the gate valves)

3. Locate the Pump: Identify the location of the existing pump in your hot tub. It's usually located near the equipment area or in a designated pump compartment.

4. Disconnect the Electrical Wiring: Carefully disconnect the electrical wiring from the old pump. This typically involves removing the electrical conduit cover, unscrewing wire nuts, and disconnecting the wires from the terminals. Be sure to note the wire connections or take a picture for reference when connecting the new pump.

5. Disconnect the Plumbing: Depending on your hot tub's plumbing setup, you'll need to disconnect the plumbing connections to the pump. Use a pipe wrench or adjustable wrench to loosen and remove the fittings. Be prepared for some water spillage when disconnecting the plumbing.

6. Remove the Old Pump: Once the electrical and plumbing connections are detached, carefully remove the old pump from its mounting position. Some pumps may be secured with mounting brackets or bolts.

7. Prepare the New Pump: If the new pump is not pre-assembled, you may need to attach fittings, unions, or adapters to match your hot tub's plumbing. Ensure that you use the appropriate sealant or Teflon tape on threaded connections to prevent leaks.

8. Mount the New Pump: Position the new pump in the same location as the old one and secure it in place using the mounting brackets or bolts.

9. Reconnect Plumbing: Reconnect the plumbing to the new pump, ensuring that all connections are tight and secure. If your hot tub uses PVC plumbing, use PVC primer and cement to bond the connections properly.

10. Reconnect Electrical Wiring: Reconnect the electrical wiring to the new pump, following the notes or pictures you took earlier. Make sure all wires are properly connected and secure.

11. Turn On the Power: Restore power to the hot tub by switching on the circuit breaker or reconnecting the disconnect switch.

12. Test the Pump: Turn on the hot tub's pump to ensure that it's working correctly. Check for any signs of leaks or irregularities in the plumbing connections.

13. Refill the Hot Tub: Once you've confirmed that the new pump is functioning properly, refill the hot tub with water.

14. Check for Leaks: Inspect the plumbing connections for any leaks. If you find any, turn off the pump, drain the tub again, and reseal the connections as needed.

15. Monitor: Keep an eye on the pump and plumbing for the next few days to ensure everything is functioning correctly and that there are no further issues.

Remember that this is a general guideline, and the specific steps may vary based on your hot tub's design. If you're unsure or uncomfortable with any aspect of this process, please do get in touch, happy to help.

How do I know what size hot tub pump I have?

Determining the size of your hot tub pump is an important step when it comes to maintenance or replacement. To find out the size of your hot tub pump, follow these steps:

1. Check the Manual: The easiest way to determine the size of your hot tub pump is to consult the owner's manual or user documentation that came with your hot tub. The manual typically contains detailed information about the specifications and components of your hot tub, including the pump.

2. Look at the Pump Housing: If you don't have access to the manual or it doesn't provide the information you need, inspect the pump itself. Most hot tub pumps have a label or plate on the pump housing that displays essential details, including the pump's model number, manufacturer, and specifications. You can then send that to me or Google it.

3. Measure the Pump: If the label is missing or damaged, you can measure the pump's dimensions. Measure the diameter of the pump's wet end (the part where the water flows) and the length of the wet end. These measurements can help identify the size and capacity of the pump.

4. Consult the Manufacturer: If you can't find the information on the pump or in the manual, contact the hot tub manufacturer or a reputable dealer. Provide them with your hot tub's model and serial number, and they should be able to identify the correct pump size for your specific hot tub.

5. Online Research: You can also search online using the pump's model number or hot tub's make and model. Many manufacturers provide detailed information about their products on their websites, and you may find specifications for your pump model.

Once you have determined the size and specifications of your hot tub pump, you can proceed with maintenance, repairs, or replacement if necessary. Keep in mind that replacing a hot tub pump with the same size and capacity as the original is crucial to ensure proper water circulation and filtration in your hot tub. If you're unsure about any aspect of this process, get in touch, always happy to help.