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Welcome to the Hot Tub Parts of America Global shop — your international source for hot tub and spa replacement parts. Browse our extensive catalog of pumps, heaters, jets, filters, controls, and accessories from top brands like Waterway, Aqua-Flo, Balboa, Gecko, Jacuzzi®, and many more. We ship worldwide with competitive international shipping rates.
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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 -
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. Engineered to fit the 1 7/8" groove found on most standard 1 1/2" heater unions, this seal creates a watertight connection between your spa heater and...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 measurement of 3 1/8" center to center. Please verify...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.The barb end accepts 1" ID tubing while the threaded end connects to a 2 1/2" Heater Flange using a 2 1/2" Nut for secure installation...MSRP: $28.99$21.99