🔧 Laing E14 Spa Circulation Pump — 230V 1-1/2″ MBT Buttress Thread | 73348

High-flow 230V ECM circulation with 1-1/2″ buttress thread connections for larger spa plumbing systems

♨️ Product Overview

The Laing E14 (73348) is a 230V, single-speed, high-flow circulation pump with 1-1/2″ Male Buttress Thread (MBT) connections — the largest and highest-flow pump in the Laing E-series family, delivering up to 36 GPM at just 110 watts. Unlike the smaller E10 models that use barb or MPT connections, the E14 is designed for spas with 1-1/2″ plumbing systems — the standard in Master Spas, LA Spas, Clearwater Spas, Artesian Spas, Marquis Spas, Hydropool, and many other brands that require high-volume water circulation through larger plumbing.

Built with the same high-efficiency Electronically Commutated (EC) permanent magnet spherical motor found across the Laing lineup, the E14 draws just 0.45 amps at 110 watts while running at 2,100 RPM — consuming 40% less energy than standard 48-frame induction motor circulation pumps. The patented sealless, shaftless design with captured O-ring sealing and a magnetically driven open impeller means there is no mechanical seal to leak, wear, or replace. Built-in dry run protection via embedded software automatically shuts the pump down if no water is detected, while automatic overload protection and low in-rush current further safeguard the motor.

The E14 features a lock ring volute with a wet end that rotates 90° — positioning the discharge at either 12 o’clock (top) or 3 o’clock (side) to align with existing plumbing. Weighing less than 5 lbs and measuring approximately 5.8″ × 5.4″ × 6.0″, the E14 maintains the compact, lightweight form factor the Laing E-series is known for. Includes a 4-foot AMP cord with 4-pin AMP connector. Unions are sold separately — 1-1/2″ female buttress thread to 1-1/2″ slip unions with 1-7/8″ O-rings are available from Parts4Tubs.

⚠️ 230V ONLY: This pump operates on 230V power. Do NOT connect to a 115V circuit. Verify the voltage on your existing pump label before ordering.

💡 E14 vs. E10: The E14 is a completely different pump from the E10 — not just a larger connection version. The E14 delivers 36 GPM (vs E10’s 15 GPM), uses 1-1/2″ MBT connections (vs barb or MPT), draws 110 watts at 2,100 RPM (vs 71W at 3,200 RPM), and has a maximum head of 10.5 feet (vs 20 feet). If your spa uses 3/4″ or 1″ barb/MPT connections, you need an E10 model instead.

⭐ Key Features

✅ 36 GPM Maximum Flow — Highest flow rate in the Laing E-series — designed for high-volume spa circulation

✅ 1-1/2″ Male Buttress Thread (MBT) — Standard connection for larger spa plumbing systems

✅ ECM Permanent Magnet Motor — 110 watts at 0.45 amps / 2,100 RPM — 40% less energy than induction motors

✅ Sealless, Shaftless, Leak-Proof — Patented magnetically driven design with captured O-ring sealing

✅ Dry Run Protection — Embedded software shuts down pump if no water detected — prevents damage

✅ Rotatable Wet End — 90° — Discharge positions at 12 o’clock or 3 o’clock for plumbing alignment

✅ Whisper-Quiet — Virtually silent 24/7 continuous operation

✅ Lock Ring Volute — Secure wet end fastening with captured O-ring design

✅ Automatic Overload Protection — Built-in motor protection with low in-rush current

✅ 4′ AMP Cord with 4-Pin Connector Included — Plug-and-play for spas with AMP-style wiring

✅ Mounting Bracket Included — Adjustable to 4 different discharge angles

✅ 1-Year Manufacturer’s Warranty — Full warranty coverage

🔩 Technical Specifications

Specification	Value
Manufacturer	Laing / Xylem / Goulds
Series	E14 (Ecocirc)
Part Number	73348
Laing Model	E14-NSTNNN2W-10 (also E14-NSTNDNN2W-02, E14-NSTNDNN2W-03, E14-NSTN2W-10)
Laing OEM Number	6080U0014 (also 6080U0015 newer revision)
Pump Type	Circulation Pump — Single Speed
Motor Type	ECM — Electronically Commutated AC/DC/AC Spherical Motor (Canned Spherical Type) — Permanent Magnet
Horsepower	1/40 HP (per Parts4Tubs)
Input Power	110 watts (230V / 60Hz)
Voltage	230V
Frequency	50/60 Hz
Amperage	0.45A
RPM	2,100
Flow Rate (Max)	36 GPM
Maximum Head	10.5 feet
Maximum Working Pressure	50 PSI
Connection Type	1-1/2″ Male Buttress Thread (MBT) — intake and discharge
Suction Connection OD	Approximately 2-7/16″
Suction	Center suction
Discharge	Side discharge
Discharge Rotation	Wet end rotates 90° — 12 o’clock (top) or 3 o’clock (side)
Rotation	Counter-clockwise (viewed from motor end)
Impeller Type	Open — magnetically driven — clog resistant
Seal	None — patented sealless, shaftless design with captured O-ring
Volute Fastening	Lock ring
Wet End	Thermoplastic
Maximum Temperature	140°F (60°C)
Mounting	Horizontal or vertical (motor end down) — bracket adjustable to 4 discharge angles
Dimensions (L × W × H)	Approximately 5.8″ × 5.4″ × 6.0″ (147 × 137 × 152 mm)
Weight	Less than 5 lbs
Cord	✅ 4′ (48″) AMP cord with 4-pin AMP connector INCLUDED
Mounting Bracket	✅ INCLUDED — adjustable to 4 discharge angles
Unions	⚠️ SOLD SEPARATELY — 1-1/2″ female buttress thread to 1-1/2″ slip
Union O-Rings	⚠️ SOLD SEPARATELY — 1-7/8″ diameter
Dry Run Protection	✅ Embedded software — auto-shutdown
Overload Protection	✅ Automatic motor overload protection
In-Rush Current	Low in-rush current design
Duty Cycle	Continuous — designed for 24/7 operation
Warranty	1-year manufacturer’s warranty

⚡ Electrical Requirements

Electrical Spec	Requirement
Supply Voltage	230V
Frequency	50/60 Hz
Phase	Single Phase
Amperage	0.45A
Input Wattage	110W
RPM	2,100
Cord	4′ (48″) — AMP cord with 4-pin AMP connector — INCLUDED
Motor Type	ECM AC/DC/AC Spherical — Permanent Magnet
Overload Protection	Automatic — built-in
In-Rush Current	Low — soft start design

E14 vs. E10 Motor Comparison

Specification	E10 (230V)	E14 (THIS PUMP)
Input Wattage	71W	110W
Amperage	See manufacturer docs	0.45A
RPM	3,200	2,100
Flow Rate (Max)	15 GPM	36 GPM
Max Head	20 ft	10.5 ft
Connections	3/4″ barb, 1″ barb, or 3/4″ MPT	1-1/2″ MBT

💡 The E14 trades head pressure for flow volume — running at lower RPM (2,100 vs 3,200) but moving more than twice the water (36 GPM vs 15 GPM) through its larger 1-1/2″ plumbing. Choose the E14 for spas with 1-1/2″ plumbing that need high-volume circulation.

⚠️ CRITICAL: This is a 230V pump ONLY. The E14 is only available in 230V. There is no 115V version of the E14. Always verify voltage on your existing pump label before ordering.

⚠️ AMP CORD NOTE: This pump includes a 4-pin AMP connector. If your spa uses a different plug type (such as Gecko in.link), you may need to swap the plug from your old pump or purchase an adapter. Some customers report needing to splice the cord to match their spa’s wiring harness.

⚠️ ELECTRICAL SAFETY: All electrical installations must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and local building codes. Hot tubs require GFCI (Ground-Fault Circuit Interrupter) protection. A dedicated circuit is required — do not share with other appliances.

🔗 Compatibility Guide

Compatible Spa Brands — Confirmed

Brand	Compatibility	Part Number / Notes
Master Spas	✅ Confirmed — OEM	X400825, X320565 — 2009+ models
LA Spas	✅ Confirmed — OEM	EL-64109, EL-64109-1
Clearwater Spas	✅ Confirmed — OEM	6080U0014, 5EL-64109-1
Artesian Spas	✅ Confirmed — OEM	21-0008-19 (AMP cord); 21-0009-19 (in.link cord)
Marquis Spas	✅ Confirmed	Per HotTubOutpost
Hydropool	✅ Confirmed	6505116
Dynasty Spas	✅ Confirmed	LMB07102983
Saratoga Spas	✅ Confirmed	Per HotTubOutpost
Royal Spas	✅ Confirmed	Per HotTubOutpost
Down East Spas	✅ Confirmed	Per tubs.parts
Wellis Spas	✅ Confirmed	ACM0452
Arctic Spas	✅ Confirmed	140200
Canadian Spa	✅ Confirmed	6080C0016
Coleman	✅ Confirmed	Via LA Spas EL-64109 cross-reference
California Cooperage	✅ Confirmed	Via LA Spas EL-64109 cross-reference
Elite Spas	✅ Confirmed	Via LA Spas EL-64109 cross-reference
Any 230V spa with 1-1/2″ MBT circ pump	✅ Universal fit	Same voltage and connection type

This Pump Replaces — Previous E14 Models

Old Model / Part Number	Notes
73229	Previous Laing E14 revision — direct replacement
37749	Previous Laing E14 revision — direct replacement
73329	Previous Laing E14 revision — direct replacement
73359	LA Spas E14 variant — direct replacement
E14-NSTNDNN2W-02	Older Laing model revision
E14-NSTNDNN2W-03	Older Laing model revision

Plumbing Compatibility — Connection Type Is Critical

Your Existing Connection	This Pump	Notes
1-1/2″ MBT (buttress thread)	✅ Direct fit	Standard E14 connection — unions sold separately
3/4″ barb	❌ Wrong type/size	Use E10 series (73979 for 230V, 73989 for 115V)
1″ barb	❌ Wrong type/size	Use E10 series (74079 for 230V, 74069 for 115V)
3/4″ MPT (pipe thread)	❌ Wrong type/size	Use E10 series (73999 for 230V, 74009 for 115V)

Laing E-Series Family Comparison

Series	Part Number	Voltage	Connection	Max Flow	Max Head	Watts	Best For
E14	73348	230V	1-1/2″ MBT	36 GPM	10.5 ft	110W	✅ THIS PUMP — Large spas with 1-1/2″ plumbing
E10	73979	230V	3/4″ Barb	15 GPM	20 ft	71W	Standard spas with 3/4″ tubing
E10	74079	230V	1″ Barb	15 GPM	20 ft	71W	Spas with 1″ tubing
E10	73999	230V	3/4″ MPT	15 GPM	20 ft	71W	Spas with 3/4″ threaded PVC
E10	73989	115V	3/4″ Barb	15 GPM	20 ft	62W	115V spas with 3/4″ tubing

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📐 Alternate Part Numbers

Primary Part Numbers

Part Number	Notes
73348	Laing primary part number (THIS PUMP)
6080U0014	Laing OEM manufacturer number
6080U0015	Laing newer revision OEM number
E14-NSTNNN2W-10	Laing model number
E14-NSTNDNN2W-02	Laing earlier model revision
E14-NSTNDNN2W-03	Laing model revision
E14-NSTNDNN2W-05	Laing model revision
E14-NSTN2W-10	Laing model variant
E14-NST2NNN2W-10	Laing model variant
E14-NST2NW-10	Laing model variant
LHB07100142	Laing catalog reference
LHB07102983	Laing catalog reference
LMB07102983	Laing/Dynasty catalog reference
733886733488	UPC / barcode

Previous Models Replaced

Part Number	Notes
73229	Previous E14 revision — direct replacement
73329	Previous E14 revision — direct replacement
37749	Previous E14 revision — direct replacement
73359	LA Spas E14 variant — direct replacement

Master Spas Cross-References

Part Number	Notes
X400825	Master Spas primary circ pump part number
X320565	Master Spas alternate/older part number
6080U0015	Master Spas OEM reference

LA Spas / Clearwater Cross-References

Part Number	Notes
EL-64109	LA Spas primary part number
EL-64109-1	LA Spas variant (also Coleman, California Cooperage, Elite Spas)
5EL-64109-1	Clearwater Spas variant
6080U0014	Clearwater/LA Spas OEM reference
HIFLW73359	LA Spas cross-reference

HydroQuip Cross-References

Part Number	Notes
10-0107	HydroQuip catalog number
10-0107-K	HydroQuip kit format

Artesian Spas Cross-References

Part Number	Notes
21-0008-19	Artesian Spas — with AMP cord
21-0009-19	Artesian Spas — with Gecko in.link cord (different cord type)

Brand-Specific Cross-References

Part Number	Brand	Notes
6505116	Hydropool / Clair Azur	OEM reference
ACM0452	Wellis Spas	OEM reference
140200	Arctic Spas	OEM reference
6080C0016	Canadian Spa	OEM reference
LMB07102983	Dynasty Spas	OEM reference
301524	Distributor reference	Per hotubparts
900800681	Distributor reference	Per hotubparts/Fruugo
P2450	Industry reference	Per SpaCare/PartsForSpas

Industry / Distributor Cross-References

Part Number	Notes
1-00-0214	Industry reference
9338-40	Laing catalog number
34-158-1500	Horizon reference
15-375-0014	Distributor reference
6080U0032	Distributor reference
6050C0007	Distributor reference
6050C0005	Distributor reference
6080U0016	Distributor reference

LX Lower-Cost Alternative

Part Number	Notes
WE14-240	LX brand E14 equivalent (10-WE14-240) — larger physical size — verify fitment

Grundfos Replacement Alternative

Part Number	Notes
10-0138-KIT	Grundfos universal 230V circ pump kit — uses barb connections with adapters (different connection type)

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🛠️ Installation Requirements

What’s in the Box

Item	Included	Notes
Laing E14 circulation pump	✅ Yes	Complete pump assembly with lock ring volute
4′ (48″) AMP cord	✅ Yes	4-pin AMP connector plug
Mounting bracket	✅ Yes	Adjustable to 4 discharge angles
1-1/2″ MBT unions	⚠️ Typically NOT included	Purchase separately — verify with Parts4Tubs
Union O-rings	⚠️ Typically NOT included	1-7/8″ diameter — purchase separately

Mounting

Requirement	Specification
Mounting Position	Horizontal OR vertical (motor end down ONLY)
Mounting Method	Bracket adjustable to 4 discharge angles
Wet End Rotation	Rotates 90° — loosen lock ring nut, rotate volute to 12 o’clock or 3 o’clock
Do NOT Mount	Motor end UP — only horizontal or motor end down
Access	Allow clearance for union connections and maintenance

Plumbing

Connection	Size	Notes
Intake (suction)	1-1/2″ MBT (center suction)	Approximately 2-7/16″ OD at thread
Discharge	1-1/2″ MBT (side discharge)	Approximately 1-7/8″ OD at thread
Unions	1-1/2″ female buttress to 1-1/2″ slip	Sold separately — use with 1-7/8″ O-rings
Plumbing	1-1/2″ PVC pipe or hose	Through union connections

Installation Notes

⚠️ Verify Voltage FIRST: This pump operates on 230V ONLY. There is no 115V version of the E14.

⚠️ Unions Sold Separately: This pump typically ships without unions. Order 1-1/2″ female buttress thread to 1-1/2″ slip unions and 1-7/8″ O-rings separately. Verify with Parts4Tubs at time of order.

⚠️ AMP Cord Compatibility: This pump includes a 4-pin AMP connector. If your spa uses a different plug type, you may need to swap the plug from your old pump or splice wires to match your wiring harness.

⚠️ Wet End Orientation: The volute can be rotated 90° to position the discharge at 12 o’clock (top) or 3 o’clock (side). Loosen the lock ring nut with a wrench, rotate, and re-tighten.

⚠️ First Startup: Low in-rush current design. If the pump detects no water, it will shut down automatically (dry run protection) and retry.

⚠️ Motor Orientation: Horizontal or vertical with motor end DOWN only. Never mount motor end up.

⚠️ Maximum Water Temperature: 140°F (60°C). Do not exceed.

⚠️ GFCI Protection Required: All spa installations require GFCI protection per the NEC.

⚠️ Bonding & Grounding Required: Per NEC requirements.

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⚙️ Maintenance Guide

Routine Maintenance

Task	Frequency	Notes
Check for water flow	Monthly	Verify circulation is active
Inspect union connections	Monthly	Check for leaks at buttress thread unions and O-rings
Listen for unusual noise	Monthly	Should be virtually silent
Inspect AMP cord and connector	Quarterly	Check for corrosion or damage
Check mounting bracket	Quarterly	Ensure pump is secure
Inspect O-rings	Quarterly	Replace if cracked, flat, or leaking
Verify GFCI operation	Monthly	Press test button to check

Warning Signs — Replace Pump If:

• Pump fails to start or hums without rotation
• Unusual noise (clicking, grinding, buzzing)
• No water circulation despite pump running
• Motor trips breaker or GFCI repeatedly
• Pump vibrating excessively
• Dry run protection cycling repeatedly (if plumbing is clear, pump may need replacement)
• Water leaking from pump body (not from unions)
• Error codes on spa controller related to circulation (FLO, FL1, etc.)

Sealless Design Advantage

The Laing E14’s patented sealless, shaftless design with captured O-ring sealing means there is no mechanical shaft seal to fail. If water appears at this pump, check union O-rings and union tightness first — these are the most common leak points. The only replacement part for the E14 pump body is the rotor assembly.

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ 230V spa with 1-1/2″ MBT circ pump	✅ Yes — Primary use	Direct replacement for all 1-1/2″ buttress thread systems
♨️ Master Spas circ pump (2009+)	✅ Yes — OEM	Replaces X400825, X320565
♨️ LA Spas circ pump	✅ Yes — OEM	Replaces EL-64109, EL-64109-1
♨️ Clearwater Spas circ pump	✅ Yes — OEM	Replaces 5EL-64109-1
♨️ Artesian Spas circ pump	✅ Yes — OEM	Replaces 21-0008-19 (AMP), 21-0009-19 (in.link)
♨️ Marquis / Hydropool / Dynasty circ pump	✅ Yes — Confirmed	230V with 1-1/2″ MBT
♨️ Arctic / Wellis / Canadian Spa circ pump	✅ Yes — Confirmed	230V with 1-1/2″ MBT
♨️ Previous E14 replacement (73229, 37749)	✅ Yes — Direct upgrade	Drop-in replacement for all earlier E14 models
♨️ High-flow heater circulation	✅ Yes — Designed for	36 GPM handles high-flow heater requirements
♨️ Ozone / saltwater treatment circulation	✅ Yes — Designed for	Per Pool-Spa-Supplies applications list
♨️ Spas with 3/4″ or 1″ barb connections	❌ No — Wrong type	Use E10 series (73979, 74079, etc.)
♨️ 115V spa systems	❌ No — Wrong voltage	E14 is 230V only — no 115V version exists

❓ Frequently Asked Questions

Q: What is the difference between the E14 and the E10? A: The E14 is a larger, higher-flow pump designed for spas with 1-1/2″ plumbing. The E14 delivers 36 GPM at 110 watts through 1-1/2″ MBT connections, while the E10 delivers 15 GPM at 71 watts through 3/4″ or 1″ connections. The E14 has lower maximum head pressure (10.5 ft vs 20 ft). They are completely different pumps — not interchangeable.

Q: What spas use this pump? A: The E14 is used in Master Spas (2009+), LA Spas, Clearwater Spas, Artesian Spas, Marquis Spas, Hydropool, Dynasty Spas, Saratoga Spas, Royal Spas, Down East Spas, Wellis, Arctic Spas, Canadian Spa, Coleman, California Cooperage, and Elite Spas, among others.

Q: Are unions included? A: Typically NOT included — verify with Parts4Tubs at time of order. Purchase 1-1/2″ female buttress thread to 1-1/2″ slip unions and 1-7/8″ O-rings separately if needed.

Q: What cord/plug does this pump use? A: It includes a 4-foot AMP cord with a 4-pin AMP connector. If your spa uses a different connector type (such as Gecko in.link), you may need to swap the plug from your old pump or splice wires. For Artesian Spas requiring an in.link plug, see part number 21-0009-19.

Q: Does this replace the 73229 and 37749? A: Yes — the 73348 is the current version that replaces all previous E14 models including 73229, 37749, 73329, and 73359.

Q: Does this pump have a shaft seal? A: No — the Laing E14 uses a patented sealless, shaftless design with a captured O-ring. There is no mechanical seal to leak or replace. If leaking occurs, check union O-rings first.

Q: What is the maximum flow rate? A: Up to 36 GPM depending on system conditions. Maximum head pressure is 10.5 feet. Maximum working pressure is 50 PSI.

Q: Can I mount this pump vertically? A: Yes — horizontal or vertical with motor end down only. The mounting bracket adjusts to 4 discharge angles, and the wet end rotates 90° for additional plumbing alignment flexibility.

Q: How quiet is this pump? A: Virtually silent — designed for 24/7 continuous operation. The E14 uses the same whisper-quiet ECM motor technology as the E10 series.

Q: Is there a 115V version of the E14? A: No — the E14 is 230V only. There is no 115V E14 model available.

Q: What is the maximum water temperature? A: 140°F (60°C). Do not exceed.

Q: Can the wet end be rotated? A: Yes — the volute rotates 90° (12 o’clock or 3 o’clock position). Loosen the lock ring nut with a wrench, rotate to desired position, and re-tighten.

Q: Is there a lower-cost alternative? A: The LX WE14-240 is a lower-cost alternative, though it is physically larger — verify fitment in your equipment bay before ordering. The Grundfos 10-0138-KIT is a universal 230V option but uses barb connections (different type).

Q: Do I need a GFCI breaker? A: Yes — GFCI protection is required by the NEC for all hot tub and spa installations.

Q: What warranty is included? A: 1-year manufacturer’s warranty. Contact Parts4Tubs for full terms

🏆 Why Choose the Laing E14 73348

✅ Highest Flow in the E-Series — 36 GPM — designed for larger spas with 1-1/2″ plumbing

✅ OEM Across Major Brands — Master Spas, LA Spas, Clearwater, Artesian, Marquis, Hydropool, Dynasty, Arctic, Wellis

✅ ECM Permanent Magnet Motor — 110 watts at 0.45 amps — 40% less energy than induction motors

✅ Patented Sealless Design — No mechanical seal — captured O-ring sealing — nothing to replace

✅ Built-In Protections — Dry run (embedded software), overload, low in-rush current

✅ Rotatable Wet End — 90° rotation for flexible plumbing alignment

✅ Lock Ring Volute — Secure fastening with captured O-ring

✅ Whisper-Quiet — Virtually silent 24/7 continuous operation

✅ Compact & Lightweight — Less than 5 lbs — fits in tight equipment bays

✅ 4′ AMP Cord & Bracket Included — Plug-and-play installation

✅ Proven Reliability — Laing (Xylem/Goulds) — world-renowned circulation pump manufacturer

✅ 1-Year Manufacturer’s Warranty — Full warranty coverage

🤝 Why Buy From Parts4Tubs

✅ Fast shipping across the United States

✅ Expert advice from spa and hot tub specialists

✅ Competitive pricing

✅ Full warranty support

✅ Hassle-free returns

✅ 1-1/2″ female buttress thread unions and 1-7/8″ O-rings available

✅ Dedicated customer service team

💫 Summary

The Laing E14 (73348) is the highest-flow pump in the Laing E-series — a 230V circulation pump with 1-1/2″ Male Buttress Thread (MBT) connections delivering up to 36 GPM at just 110 watts / 0.45 amps / 2,100 RPM. Designed for larger spas with 1-1/2″ plumbing systems used by Master Spas, LA Spas, Clearwater, Artesian, Marquis, Hydropool, Dynasty, Arctic, Wellis, and many more. Features the same high-efficiency ECM permanent magnet spherical motor with patented sealless, shaftless, leak-proof design, captured O-ring sealing, and lock ring volute. Built-in dry run protection, overload protection, and low in-rush current. Wet end rotates 90° for flexible discharge orientation. Less than 5 lbs, approximately 5.8″ × 5.4″ × 6.0″, center suction / side discharge, counter-clockwise rotation, 140°F maximum temperature, 50 PSI maximum working pressure, 10.5 ft maximum head. Includes 4′ AMP cord with 4-pin connector and mounting bracket. Unions sold separately. 230V only — no 115V version exists. Replaces all previous E14 models (73229, 37749, 73329, 73359). 1-year manufacturer’s warranty. Available now at Parts4Tubs.

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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: 554 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: 486 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: 419 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: 161 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.