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 & 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. Each valve accepts a 2" pipe or fitting on the spigot end while the slip side inserts into a 2"...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 or O-ring. The valve design accepts a 2" pipe or fitting on the spigot end while the slip side inserts into a 2" fitting. Assembly...MSRP: $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 with Gaskets. Each union accepts a 1 1/2" pipe or fitting on the slip end while threading onto a 1 1/2"...MSRP: $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 connection measuring approximately 1 7/8" ID, complete with gasket included. The slip side accommodates a 1 1/2" pipe or fitting...MSRP: $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" OD). Each union accepts a 1 1/2" pipe or fitting on the slip end and connects via threading to a 2"...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) Heater Union complete with Gasket. This union fitting accepts a 1 1/2" pipe or fitting on the slip end while threading onto a 2" Heater Flange...MSRP: $15.99$9.99 -
Set of 2 - 2 Inch Slip x 2 Inch Heater Union with Gaskets | Spa Plumbing Fittings
HTPOFAmerica
$17.99You 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. Each union accepts a 2 inch pipe or fitting on the slip end while...$17.99 -
2" Heater Union 2" Slip with Gasket - Spa Heater Connection Fitting
HTPOFAmerica
MSRP: $15.99$9.99This product is a 2" Slip measuring approximately 2 3/8" ID X 2" measuring approximately 3" OD Heater Union with Gasket. This union accepts a 2" pipe or fitting on one end measuring approximately 2 3/8" Outside Diameter and threads onto a 2" Heater...MSRP: $15.99$9.99 -
2-Pack 2" Heater Union Split Nut Kit with Gaskets & Screws - Hot Tub Spa Parts
HTPOFAmerica
MSRP: $21.99$14.99Complete hardware kit containing (2) 2" split nuts with approximately 3" inside diameter, (4) mounting screws, and (2) gaskets designed for connecting 2" heater tubes to heater unions. Each flange-style split nut attaches directly to your heater tube...MSRP: $21.99$14.99 -
2" Heater Union Split Nut Assembly Kit with Gasket (3" ID) - Includes Screws
HTPOFAmerica
MSRP: $12.99$8.99This complete heater connection kit features a 2" heater flange split nut with approximately 3" inner diameter, accompanied by a gasket and (2) mounting screws designed for 2" heater unions that measure roughly 3" edge to edge on the threaded portion...MSRP: $12.99$8.99 -
1.5 Inch Heater Split Nut Assembly Kit (Set of 2) with Gaskets for Spa Hot Tub Union Connection
HTPOFAmerica
MSRP: $18.99$14.49Complete assembly kit containing: (2) 1 1/2 inch heater flange split nuts, (4) mounting screws, and (2) gaskets designed for connecting 1 1/2 inch heater tubes to unions. The threaded union side measures approximately 2 3/8 inches outer diameter.Each...MSRP: $18.99$14.49 -
1.5 Inch Spa Heater Split Nut Assembly Kit with Gasket - Complete Installation Set
HTPOFAmerica
MSRP: $12.99$8.49This complete assembly is a 1 1/2 inch heater split nut kit featuring the split nut component, gasket, and (2) mounting screws designed for 1 1/2 inch heater unions measuring approximately 2 3/8 inches outer diameter. The heater flange split nut securely...MSRP: $12.99$8.49