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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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 -
1 1/2" Union Gasket for Heater or Pump - 1 7/8" Groove - 2 3/8" Diameter
HTPOFAmerica
MSRP: $7.99$4.99IMPORTANT: This gasket is NOT compatible with Coleman SALUSPA systems. Please refer to specific Saluspa gaskets for those models.MSRP: $7.99$4.99 -
Union O-Ring 2-3/8" ID x 1/8" Width, 2 1/2" Center to Center for Heater & Pump
HTPOFAmerica
MSRP: $6.99$4.99Premium replacement union O-Ring designed for 2" heater tailpiece unions and pump unions in spa, pool, and hot tub systems. This versatile seal features precise dimensions: 2 3/8" inside diameter,...MSRP: $6.99$4.99 -
1-1/2" Flat Union Gasket for Spa Heater & Pump - 2-5/16" OD, 1-7/16" ID
HTPOFAmerica
MSRP: $4.51$3.51Premium flat gasket engineered for 1-1/2" union connections on spa pumps and heaters. Features 2-5/16" outer diameter and 1-7/16" inner diameter for precise fitment. This versatile gasket works...MSRP: $4.51$3.51 -
2" Union Flat Gasket - Pump & Heater - 2-15/16" OD x 2-1/8" ID - No Lip
HTPOFAmerica
MSRP: $7.99$5.99This versatile flat gasket works with 2" unions for pumps and heaters, featuring a no-lip design with 2-15/16" OD and 2-1/8" ID dimensions. Ideal for multiple spa and pool applications, this seal...MSRP: $7.99$5.99 -
2" Spa Heater Pump Union Gasket 2 1/2" Lip - Balboa Gecko Compatible
HTPOFAmerica
MSRP: $7.99$4.99This is a standard 2" heater or pump union seal featuring a 2 1/2" lip measurement center to center. External diameter measureMSRP: $7.99$4.99 -
Heater Union Tailpiece 2 1/2" mbt x 1" barb 90° with Pressure Tap & Gasket for Saratoga Retrofit
HTPOFAmerica
MSRP: $38.99$24.99Customized heater union tailpiece assembly featuring an integrated pressure switch tap, specifically designed for Saratoga retrofit heater installations. This 90 degree angled fitting accommodates...MSRP: $38.99$24.99 -
2 1/2" Heater Flange Split Nut with Gasket - 3 9/16" ID for 3" Heater Tube Assembly
HTPOFAmerica
MSRP: $24.99$19.99This 2 1/2" heater flange split nut assembly includes a gasket and features a 3 9/16" inside diameter design. The split nut component fastens to your heater tube via 2 mounting screws and threads...MSRP: $24.99$19.99