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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1 1/2" Spa Heater Union O-Ring - 1 7/8" Center to Center Measurement
HTPOFAmerica
MSRP: $7.99$5.99This replacement O-ring is designed for 1 1/2" heater unions and measures 1 7/8" center to center.MSRP: $7.99$5.99
2 Pack - 2 1/2" Therm Style Heater Union Gaskets for Hot Tub Spa Pump Plumbing
HTPOFAmerica
MSRP: $19.99$14.99This is a pair of 2 1/2" Therm style union gaskets designed for sealing heater or pump unions in hot tub plumbing systems.These gaskets are specifically sized at 3 1/4" O.D. x 2 3/4" I.D. with lip...MSRP: $19.99$14.99
2 1/2" Threaded x 1" 90° Barb Heater Union with Gasket for Hot Tub Spa
HTPOFAmerica
MSRP: $28.99$21.99This component is a 2 1/2" Threaded X 1" 90 Degree Barb Heater Union with Gasket designed for spa heating systems.MSRP: $28.99$21.99
2" 45° Spa Pump Union Heater Connection Assembly with Gasket - Global Hot Tub Parts
HTPOFAmerica
MSRP: $30.99$25.99This component is a 2" 45° Heater Connection Assembly with Pump Union & Gasket. This union assembly features a dual-connection design: one end bonds permanently into a 2" fitting, while the opposite...MSRP: $30.99$25.99
2 Inch Hot Tub Heater Split Nut Assembly Kit - Set of 2 with Unions & Slice Gate Valves
HTPOFAmerica
MSRP: $89.96$67.99This package includes a complete set of TWO (2) 2" heater connection assemblies, each containing: one split nut, two screws, one 2" slip x 2" threaMSRP: $89.96$67.99
2" Heater Union Complete Kit - Split Nut, Slip x Thread Union, Gasket & Screws
HTPOFAmerica
MSRP: $44.98$34.98This complete kit includes everything needed for 2" heater connections: 2" Heater Split Nut Assembly, 2" Slip X 2" Threaded Union, Gasket, and (2) Mounting ScrewsMSRP: $44.98$34.98
2" Heater Split Nut & Union Kit Set of 2 - Hot Tub Spa Parts with Gaskets & Hardware
HTPOFAmerica
MSRP: $39.98$29.99This complete kit includes everything needed for TWO 2" Heater Connections: (2) split nuts, (4) mounting screws, (2) 2" Slip XMSRP: $39.98$29.99
2" Heater Union Complete Assembly Kit - Split Nut, Slip Thread Union & Gasket
HTPOFAmerica
MSRP: $19.99$16.99This complete assembly includes everything needed: 2" Split Nut for Heater Flange, 2" Slip X 2" Thread Union, matching gasket, and (2) mounting screwsMSRP: $19.99$16.99
Standard 2 1/2" Pump Union O-Ring - Hot Tub Spa Replacement Seal
HTPOFAmerica
MSRP: $7.99$5.99This replacement seal is a Standard 2 1/2" Pump Union O-Ring designed for spa plumbiMSRP: $7.99$5.99
MSRP: $17.77$13.82
2 1/2" Slip x 2 1/2" Thread Spa Heater Union with Gasket - Hot Tub Plumbing Fitting
HTPOFAmerica
MSRP: $38.99$29.99This listing is for a 2 1/2" Threaded X 2 1/2" Slip Heater Union with Gasket designed for spa heating systems. The slip side aMSRP: $38.99$29.99
Heater Tailpiece 2 1/2" Male Buttress Thread x 2" Slip Connection
HTPOFAmerica
MSRP: $29.99$19.99This heater tailpiece features dual connection options: 2 1/2" male buttress thread on one end and 2" slip fitting on the other, designed for spa and hot tub heating systems.Precise measurements: The...MSRP: $29.99$19.99