💪 Balboa Vico Ultimax Spa Pump 5235210-S — 2.5 HP Dual-Speed 230V 56-Frame | High-Flow Jet Pump

Industry-leading design flexibility with flow rates exceeding 325 GPM for powerful hydrotherapy performance

♨️ Product Overview

The Balboa Vico Ultimax 5235210-S is a 2.5 HP true continuous rated, dual-speed jet pump manufactured by Balboa Water Group — the world’s largest manufacturer of electronic control systems and components for the spa and hot tub industry. Operating at 230V/60Hz with 10.0 Amps on high speed (3,450 RPM) and 3.5 Amps on low speed (1,725 RPM), this 56-frame side-discharge pump delivers exceptional hydrotherapy jet performance with flow rates exceeding 325 gallons per minute. The Ultimax series (formerly known as Vico Ultimax and Vico Niagara) represents the ultimate benchmark in design flexibility, engineered for applications ranging from small zone seating and focused therapy to multi-pump configurations capable of running 100+ jetted systems. All seals are carbon ceramic with Viton elastomers for long-lasting performance that easily endures prolonged heat and aggressive chemical exposure. The multi-directional volute mountings provide maximum flexibility to accommodate any plumbing configuration, while the cool-running 56-frame motor ensures reliable performance and extended service life. This pump shares the same design and footprint as the discontinued UltraJet pumps, making it a simple direct swap when replacement is needed. Cord and unions not included — sold separately.

✨ Key Features

✅ 2.5 HP True Continuous Rated Motor — Full-rated 2.5 HP output power with dual-speed operation at 3,450/1,725 RPM for powerful jets and efficient circulation

✅ Flow Rates Exceeding 325 GPM — Maximum performance hydraulics for luxury spa applications requiring strong jet pressure across multiple zones

✅ Carbon Ceramic Seals with Viton Elastomers — Long-lasting seal technology that easily endures prolonged heat and aggressive chemical exposure including salt water systems

✅ Cool-Running 56-Frame Motor — Energy-efficient 56Y thru-bolt motor designed specifically for spa applications with reduced heat buildup for extended motor life

✅ 10.0 / 3.5 Amp Draw — High speed at 10.0 Amps for jet power; low speed at just 3.5 Amps for energy-efficient filtration and quiet circulation

✅ Multi-Directional Volute Mountings — Wet end rotates to accommodate any plumbing configuration; held on with 5 bolts for easy adjustment

✅ 2″ MBT Side Discharge — 2″ Male Buttress Thread on both suction and discharge with approximately 3″ outside diameter thread measurement

✅ Direct UltraJet Replacement — Same design and footprint as the discontinued UltraJet/Vico pumps for simple drop-in replacement

✅ Ultimax Style Wet End — Balboa’s premium wet end design optimized for maximum flow efficiency and performance

✅ Automatic Motor Overload Protection — Built-in thermal protection for motor safety and longevity

✅ Scalable System Design — From small zone seating configurations to multi-pump systems running 100+ jets

✅ 1-Year Manufacturer Warranty — OEM Balboa Water Group warranty coverage when installed by a qualified installer

🔩 Technical Specifications

Specification	Value
Manufacturer	Balboa Water Group
Pump Series	Ultimax (formerly Vico Ultimax / Vico Niagara)
Part Number	5235210-S
Horsepower (Continuous Rated)	2.5 HP
Speed Settings	Dual Speed (2-Speed)
High Speed RPM	3,450 RPM
Low Speed RPM	1,725 RPM
Voltage	230V
Frequency	60 Hz
High Speed Amperage	10.0 Amps
Low Speed Amperage	3.5 Amps
Frame Type	56 Frame (56Y, Thru-Bolt)
Motor Brand	Century or U.S. Motors (varies by production run)
Discharge Location	Side
Discharge Size	2″ MBT (Male Buttress Thread)
Suction Size	2″ MBT (Male Buttress Thread)
Thread OD (Outer Thread)	Approximately 3″ (outside diameter)
Wet End Type	Ultimax Style
Wet End Cover	Secured with 5 bolts
Seal Type	Carbon Ceramic with Viton Elastomers
Maximum Flow Rate	Exceeding 325 GPM
Motor Overload Protection	Automatic
Wet End Rotation	Multi-directional — rotatable to match any plumbing configuration
Cord	Not Included
Unions	Not Included (sold separately)
Certifications	UL Listed
Warranty	1 Year Manufacturer Warranty

⚠️ Important — Replacing an Older UltraJet Pump: If you are replacing an older UltraJet hot tub pump, reference the high-speed amperage on the old pump’s label instead of the HP rating. UltraJet pumps’ HP ratings listed on the motors are often uprated/inflated. Match the amperage to ensure you select the correct replacement.

⚡ Electrical Requirements

Electrical Spec	Requirement
Supply Voltage	230V
Frequency	60 Hz
Phase	Single Phase
High Speed Amps	10.0 A
Low Speed Amps	3.5 A
High Speed RPM	3,450 RPM
Low Speed RPM	1,725 RPM
Motor Protection	Automatic Overload
Cord	Not Included — Reuse existing AMP cord or purchase separately

🔗 Compatibility Guide

Frame & Port Configuration

Specification	Detail
Frame	56 Frame (56Y, Thru-Bolt)
Discharge	2″ MBT — Side (Multi-directional, rotatable)
Suction	2″ MBT
Thread OD	Approximately 3″ (outside diameter)
Wet End Cover	5 bolts

Direct Replacement For

The Balboa Vico Ultimax 5235210-S is designed as a direct replacement for:

• Discontinued UltraJet / Vico pumps — Same design and footprint; simple drop-in swap
• Balboa Ultimax / Vico Ultimax / Vico Niagara pumps — with matching 56-frame, 230V, 10.0/3.5A specifications
• Any spa pump — requiring a 56-frame, 230V, 2-speed configuration with approximately 10.0A high-speed draw

Compatibility Note

Always verify compatibility by matching these critical specifications from your existing pump:

1. Frame type — must be 56 frame
2. Voltage — must be 230V
3. High-speed amperage — should be approximately 10.0A (do NOT exceed your old pump’s amperage)
4. Port size — must be 2″ intake and 2″ discharge
5. Discharge direction — side discharge

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📐 Alternate Part Numbers

This pump may be listed under the following part numbers across different retailers, spa manufacturers, and distributors. Every spa manufacturer often received their own model number for the same pump.

Balboa / Vico Primary Designations

Part Number	Notes
5235210-S	Primary Balboa OEM Part Number
5235210	Without suffix variant
5235210S	No-hyphen variant
10-5235210	HydroQuip / distributor designation (Pool-Spa-Supplies, HydroQuip confirmed)

Spa Manufacturer Cross-Reference Part Numbers

Part Number	Notes
1016155	Balboa internal model number (EasySpaParts confirmed)
1016204	Balboa replacement designation (Pool-Spa-Supplies confirmed)
PRC9069X	Motor cross-reference designation (Pool-Spa-Supplies confirmed)
PRC9089X	Motor cross-reference designation (EasySpaParts confirmed)
BB5235210S	Balboa prefix designation (EasySpaParts confirmed)
BB5235210-S	Balboa prefix with hyphen (EasySpaParts confirmed)
VIC5235210-S	Vico prefix designation (EasySpaParts confirmed)
VIC5235210S	Vico prefix no-hyphen variant (EasySpaParts confirmed)
BA593970	Balboa alternate designation (EasySpaParts confirmed)
BA542493	Balboa alternate designation (EasySpaParts confirmed)
5KCP49UN9089X	GE motor part number (EasySpaParts confirmed)

Related Ultimax Family Models (Same Platform, Different HP)

Part Number	HP	Amps (High/Low)	Notes
5235208-S	2.0 HP	8.8 / 2.9A	Lower HP model, 56 Frame, 230V
5235210-S	2.5 HP	10.0 / 3.5A	This pump
5235212-S	3.0+ HP	12.0 / 3.5A	Higher HP model, 56 Frame, 230V

💡 5235210-S vs 5235212-S: Both are 56-frame, 230V, 2-speed Ultimax pumps with 2″ MBT side discharge. The 5235210-S is the 2.5 HP model drawing 10.0/3.5A while the 5235212-S is the 3.0+ HP model drawing 12.0/3.5A. Always match the amperage to your existing pump — do not upgrade HP without verifying your spa pack’s amperage capacity.

💡 Century vs U.S. Motors Base Width: If replacing an older pump, verify the motor base width. U.S. Motors use a standard 4″ wide base (3″ O/C mounting holes). Century motors may have a wider 6″ base (3″ and 5″ O/C mounting holes). Both are functionally identical but may require different mounting bracket configurations.

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🛠️ Installation Requirements

Mounting

Requirement	Specification
Mounting Position	Horizontal — on a level surface
Location	Below water level (flooded suction required)
Surface	Solid, level, vibration-dampening
Ventilation	Adequate clearance around motor for cooling
Access	Sufficient clearance for maintenance, wet end rotation, and union connections
Motor Base	Verify base width matches mounting area (Century motors may be wider than U.S. Motors)

Plumbing

Connection	Size
Suction	2″ MBT
Discharge	2″ MBT (Side)
Thread OD	Approximately 3″
Nominal vs Actual	2.0″ pump thread measures approximately 3″ outside diameter — plumbing sizes are nominal, not actual OD

Installation Notes

⚠️ Pump must be installed below water level (flooded suction) to ensure proper priming

⚠️ Never run pump dry — causes seal damage and motor overheating

⚠️ A pump should not be allowed to run without priming for more than 2 minutes

⚠️ Ensure proper grounding and bonding per NEC requirements

⚠️ GFCI protection is required by code for all hot tub and spa installations

⚠️ Do NOT wire both speeds to run simultaneously on this 2-speed pump

⚠️ This pump does not include a power cord — save your old pump’s cord for the correct spa pack connector, or purchase a compatible cord separately

⚠️ Unions are not included — reuse existing unions or purchase separately

⚠️ Discharge and suction nipples allow for a side-stream flow (for purposes such as an ozonator venturi)

💡 Wet End Rotation: The multi-directional volute mountings allow the wet end to be rotated to match any plumbing configuration. Remove the 5 bolts securing the wet end cover, rotate to the desired position, and retighten securely.

💡 Drain Plug: The drain plug ensures no water remains in the pump body during storage — useful for hygiene and preventing freeze damage.

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🔧 Maintenance Guide

Routine Maintenance

Task	Frequency	Notes
Check for leaks	Monthly	Inspect around seal area and union connections
Inspect unions	Monthly	Hand tighten only if needed — never use a wrench
Clean strainer/filter	As needed	Remove debris to maintain proper flow
Check amperage draw	Annually	Should read approximately 10.0 A (high) / 3.5 A (low)
Inspect motor vents	Quarterly	Keep clear of debris for proper cooling
Check mounting	Quarterly	Ensure pump is secure and level; verify motor base bolts
Inspect for proper operation	Regularly	Listen for unusual noises; check flow rate

Warning Signs — Replace Pump If:

• Unusual noise (grinding, screeching, or humming without rotation)
• Water leaking from the mechanical seal area
• Motor repeatedly trips the circuit breaker
• Noticeably reduced water flow or weak jets
• Motor overheating or burning smell
• Low speed no longer functions
• Motor runs then stops unexpectedly
• Visible corrosion or damage to the wet end or motor housing

Seal Replacement

Detail	Specification
Seal Type	Carbon Ceramic with Viton Elastomers
Chemical Resistance	Viton elastomers withstand prolonged heat and aggressive chemical exposure
Replacement	Replace at first sign of leakage from the seal area

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ Hot tub jet pump	✅ Yes	Designed for spa installations requiring 2.5 HP jet performance with 325+ GPM flow
♨️ UltraJet / Vico replacement	✅ Yes	Same design and footprint as discontinued UltraJet pumps — direct swap
♨️ Dual-speed jet + filtration	✅ Yes	High speed for jets; low speed at just 3.5 Amps for energy-efficient filtration
♨️ Multi-pump configurations	✅ Yes	Designed to run 100+ jetted systems when used in multi-pump configurations
♨️ Zone seating / focused therapy	✅ Yes	Optimized for targeted hydrotherapy applications
♨️ Salt water spa systems	✅ Yes	Viton elastomer seals handle salt water and aggressive chemical environments
🛁 Whirlpool bath	⚠️ Check compatibility	May work in whirlpool applications with matching frame, port, and voltage specs

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❓ Frequently Asked Questions

Q: What horsepower is this pump? A: This pump is rated at 2.5 HP true continuous rated. Some retailers list it as “3 HP” using the SPL or marketing horsepower standard, which is a different measurement. The true continuous output is 2.5 HP. Always match your replacement pump by amperage (10.0/3.5A) rather than HP rating.

Q: What is the difference between the 5235210-S and the 5235212-S? A: Both are 56-frame, 230V, 2-speed Ultimax pumps with 2″ MBT side discharge. The 5235210-S is the 2.5 HP model drawing 10.0/3.5A, while the 5235212-S is the 3.0+ HP model drawing 12.0/3.5A. Check your existing pump’s high-speed amperage to determine which model you need. Never install a pump with higher amperage than your spa pack supports.

Q: Will this pump replace my UltraJet pump? A: Yes. The Balboa Ultimax series has the same design and footprint as the discontinued UltraJet pumps. However, do NOT match by HP — UltraJet HP ratings were often uprated/inflated. Instead, match the high-speed amperage on your old pump’s label.

Q: What voltage does this pump require? A: 230V / 60Hz single phase. All electrical installation must be performed by a licensed electrician. Verify your spa’s voltage before ordering.

Q: Does this pump come with a power cord? A: No, this pump does not include a power cord. Save your old pump’s cord so you have the correct connector for your spa pack, or purchase a compatible cord separately.

Q: Does this pump come with unions? A: No, unions are not included and are sold separately. Reuse your existing unions if they are in good condition.

Q: What motor brand will I receive? A: Balboa ships these pumps with either a Century or U.S. Motors brand motor. The motor brand may vary by production run without notice, but functionality remains the same. Note that Century motors may have a wider 6″ base compared to U.S. Motors’ standard 4″ base — verify your mounting area before installation.

Q: Can I use this as a single-speed pump? A: Yes, the 2-speed 5235210-S can be wired for single-speed operation by connecting only the high-speed wiring.

Q: What size are the ports? A: Both the suction and discharge (side) ports are 2″ MBT (Male Buttress Thread). The outer thread diameter measures approximately 3″. Remember that plumbing sizes are nominal — the 2″ measurement is not the actual outside diameter of the threaded connection.

Q: Can I rotate the wet end to match my plumbing? A: Yes, the multi-directional volute mountings allow the wet end to be rotated to accommodate any plumbing configuration. Remove the 5 bolts securing the wet end cover, rotate, and retighten.

Q: What type of seals does this pump use? A: Carbon ceramic seals with Viton elastomers — a premium seal technology that provides long-lasting performance, easily enduring prolonged heat and aggressive chemical exposure including salt water systems.

Q: Is the flow rate really 325+ GPM? A: Balboa states the Ultimax series achieves flow rates exceeding 325 gallons per minute for maximum performance. This is the peak flow rate under optimal conditions; actual flow will vary based on plumbing configuration, head pressure, and jet count.

Q: What warranty is included? A: 1-year manufacturer warranty from Balboa Water Group when installed by a qualified installer. 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, reduced water flow or weak jets, the motor tripping the circuit breaker, or the motor overheating.

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

🏆 Why Choose the Balboa Vico Ultimax 5235210-S

✅ Balboa Water Group Quality — From the world’s largest manufacturer of spa control systems and components, trusted by spa manufacturers worldwide

✅ True 2.5 HP Continuous Rated — Full-rated continuous duty horsepower with efficient 10.0/3.5A draw at 230V

✅ 325+ GPM Flow Rates — Maximum performance hydraulics for luxury spa applications

✅ Carbon Ceramic / Viton Seals — Premium seal technology that outperforms standard seals in heat and chemical resistance

✅ Energy-Efficient Dual Speed — Low speed at just 3.5 Amps delivers significant energy savings during filtration cycles

✅ Multi-Directional Volute — Maximum installation flexibility to accommodate any plumbing configuration

✅ Direct UltraJet Replacement — Same footprint as discontinued UltraJet pumps for easy drop-in installation

🤝 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

✅ Replacement seals, wet ends, and AMP cords available

✅ Dedicated customer service team

⭐ Summary

The Balboa Vico Ultimax 5235210-S is a 2.5 HP true continuous rated, dual-speed, 230V/60Hz jet pump drawing 10.0/3.5 Amps at 3,450/1,725 RPM. Manufactured by Balboa Water Group with carbon ceramic seals featuring Viton elastomers, this 56-frame pump achieves flow rates exceeding 325 GPM for maximum hydrotherapy performance. The multi-directional volute mountings provide complete installation flexibility, and the same footprint as the discontinued UltraJet series ensures a simple drop-in replacement. Featuring automatic overload protection, cool-running motor design, and scalability from zone seating to 100+ jet configurations, the Ultimax delivers professional-grade reliability. Cord and unions not included. Available now at Parts4Tubs with 1-year manufacturer warranty.

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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: 503 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: 656 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: 143 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: 411 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: 157 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.