Unions, Heater
Hot tub heater unions provide the critical connection between your heater assembly and spa plumbing. Our selection includes unions in various sizes to fit most heater configurations. A good union seal prevents leaks and makes future heater servicing quick and straightforward. We offer competitive international shipping rates to buyers worldwide.
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Plumbing Retrofit Kit for Dr Wellness & Water's Edge - ET-H3000/ET-H4000 Remote Heater Conversion
HTPOFAmerica
MSRP: $169.99$139.99Comprehensive plumbing conversion kit designed for select Dr. Wellness and Water's Edge hot tub models featuring Chinese Energy Saver Controls with ET-H3000 or ET-H4000 remote heaters that have...MSRP: $169.99$139.99 -
1-1/2" Heater Union Tailpiece Assembly - MBT x Slip w/Split Nut & Gasket
HTPOFAmerica
MSRP: $19.99$14.991-1/2" Heater Union Tailpiece Assembly - MBT x Slip w/Split Nut & GasketThis complete half union tailpiece kit provides a reliable connection solution for spa and hot tub heating systems. The...MSRP: $19.99$14.99 -
MSRP: $19.99$14.99 -
1 1/2" Slip x 2" Threaded Heater Union for Hot Tub Spa - Global
HTPOFAmerica
MSRP: $10.99$8.99Need help installing this component? Look up The Hot Tub Professor on YouTube for detailed installation guidance on 2" x 1 1/2" slip spa heater unions.MSRP: $10.99$8.99 -
2 1/2" Therm Style Union Gasket for Hot Tub Heater & Pump - 3 1/4" OD x 2 3/4" ID
HTPOFAmerica
MSRP: $9.99$7.99This component is a 2 1/2" Therm Style Union Gasket Only designed for installation with 2 1/2" heater or pump unions in your spa system.When working with 2 1/2" heaters or pumps, please verify...MSRP: $9.99$7.99 -
Hot Tub Heater Split Nut 1 1/2" with 2 3/8" Threads - Includes 2 Screws for Spa Heater Union
HTPOFAmerica
MSRP: $11.99$6.99This listing is for one 1 1/2" Heater Split Nut Assembly that comes complete with split nut and (2) mounting screws designed for 1 1/2" Heater Union applications measuring approximately 2 3/8" OD...MSRP: $11.99$6.99 -
2" Spa Pump & Heater Union Gasket - Extra Thick 1/4" Flat Seal
Waterway Plastics
MSRP: $6.31$4.91This extra thick 1/4" flat seal gasket is specifically designed for 2" pump and heater unions in hot tubs and spas. Engineered with superior thickness for enhanced durability and leak prevention,...MSRP: $6.31$4.91 -
2" Heater Union Threaded MBT 3" OD x 2" Slip 2 3/8" ID with Gasket - Hot Tub Spa Parts
HTPOFAmerica
MSRP: $12.99$9.99You are purchasing a 2" Slip X 2" Heater Union with Gasket. This union accepts a 2" pipe or fitting on one end measuring approxMSRP: $12.99$9.99 -
2" Heater Split Nut for Hot Tub Spa Heater Union - Measures 3" - Includes Screws
HTPOFAmerica
MSRP: $11.99$6.99This listing is for one 2" Heater Split Nut assembly that includes the split nut component plus (2)MSRP: $11.99$6.99 -
1 1/2" Pump Union Split Nut Emergency Repair Kit with Screws for Hot Tub Spa Pumps
HTPOFAmerica
MSRP: $13.99$10.99This 1 1/2" Pump Union Split Nut Emergency Repair Kit provides a fast solution for damaged pump union connections without requiring replacement of glued plumbing components. The kit contains one...MSRP: $13.99$10.99 -
Cal Spa Mo-Flo Heater Union Gasket 2" ID x 3" ID with 2-5/8" Thin Lip
HTPOFAmerica
MSRP: $5.99$4.99This Mo-Flo heater union gasket is designed specifically for Cal Spa applications featuring a 2" inner diameter and 2-3/4" outer diameter. The distinguishing feature of this gasket is its 2-5/8"...MSRP: $5.99$4.99 -
2-1/2" Pump Union T Gasket - 3 5/8 Inside Thread Compatibility - 3 1/4" O.D. x 2 3/8" I.D.
HTPOFAmerica
MSRP: $9.99$7.99This 2 1/2" Pump Union Gasket Only creates a watertight seal between your pump and its 2 1/2" union fitting. Designed for unions measuring approximately 3 5/8" Inside Threads, this gasket features...MSRP: $9.99$7.99