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 1/2" Hot Tub Heater Union Nut Kit with Therm Gasket - Installation Guide
HTPOFAmerica
MSRP: $31.99$21.99Important - Verify Size Before Ordering: This 2 1/2" heater union nut is uncommon in standard hot tubs. Typically found only in swim spas with large 3" heaters or select smaller tubs. The standard 2"...MSRP: $31.99$21.99 -
Set of 2 Gate Slice Valves 1 1/2" & 2" Heater Unions for Hot Tub Spa - Installation Video
HTPOFAmerica
MSRP: $56.99$49.99This complete set includes (2) 1 1/2" Spigot X 1 1/2" Slip Gate Slice Valves plus (2) 1 1/2 X 2" Heater Unions with Gaskets. Each valve featuresMSRP: $56.99$49.99 -
1 1/2" & 2" Spa Isolation Slice Valve with Heater Union Kit - Installation Guide Video
HTPOFAmerica
MSRP: $34.99$28.99This package includes one 1 1/2" Spigot X 1 1/2" Slip Slice Gate Valve paired with a 1 1/2" X 2" Heater Union complete with mMSRP: $34.99$28.99 -
Pair of 1 1/2" Gate Slice Valves with Heater Unions for Hot Tub Spa - 115V Systems
HTPOFAmerica
MSRP: $57.99$48.99This complete kit includes two 1 1/2" Spigot X 1 1/2" Slip Gate Slice Valves paired with two 1 1/2" Heater UnionsMSRP: $57.99$48.99 -
1 1/2" Slice Gate Valve with Heater Union Kit - Spigot x Slip - Hot Tub Spa Service Valve
HTPOFAmerica
MSRP: $34.99$28.99This component features a 1 1/2MSRP: $34.99$28.99 -
2" Heater Union & Slice Gate Valve Kit - Set of 2 with Gaskets
HTPOFAmerica
MSRP: $64.99$56.99This complete kit includes (2) 2" Slice Gate Valves featuring 2" Spigot X 2" Slip connections, plus (2) 2" Heater Unions with matching Gaskets or O-rings.MSRP: $64.99$56.99 -
2" Heater Union & 2" Slice Gate Valve Kit for Hot Tub Spa - Complete Assembly with Gasket/O-ring
HTPOFAmerica
MSRP: $37.99$30.99This complete kit includes a 2" Spigot X 2" Slip Slice Gate Valve paired with a 2" Heater Union featuring a matching Gasket oMSRP: $37.99$30.99 -
(2X) 1 1/2" Slip x 1 1/2" Threaded Heater Union Set with Gaskets - Video Instructions Included
HTPOFAmerica
MSRP: $25.99$18.49This is a Pair of 1 1/2" Slip (measuring approximately 1 7/8") X 1 1/2" Threaded Side (measuring approximately 2 3/8" OD) Heater Unions Complete withMSRP: $25.99$18.49 -
1 1/2" Slip x 1 1/2" Threaded Spa Heater Union with Gasket - Standard Hot Tub Fitting
HTPOFAmerica
MSRP: $15.99$9.99This premium heater union features a 1 1/2" Threaded connection measuring approximately 2 3/8" OD paired with a 1 1/2" Slip connecMSRP: $15.99$9.99 -
Pair of 2" Threaded to 1.5" Slip Heater Unions with Gaskets - Adapter Set
HTPOFAmerica
MSRP: $31.99$24.99This component package includes Two (2) Heater Unions with Gaskets - 1 1/2" Slip Side (approximately 2 3/8" ID) X 2" Threaded Side (approximately 3"MSRP: $31.99$24.99 -
2" X 1 1/2" Slip Heater Union with Gasket - Installation Guide Video
HTPOFAmerica
MSRP: $15.99$9.99Global offers this adapter-style 1 1/2" Slip (approximately 1 7/8" ID) X 2" (approximately 3" OD on threads) HeaMSRP: $15.99$9.99 -
Set of 2 - 2 Inch Slip x 2 Inch Heater Union with Gaskets | Spa Plumbing Fittings
HTPOFAmerica
$18.99You receive a complete pair of 2 inch Slip connections measuring approximately 2 3/8 inch ID x 2 inch Heater Union connections measuring approximately 3 inch OD, gaskets included.$18.99