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This category contains all the unions used on a hot tub and spas plumbing. We stock a wide range of replacement plumbing unions, socket unions, split unions, unions for many brands of pumps, heaters and air blowers.
A quick guide to unions & measurements
Split Unions - Used for heaters and can be used for when a pump union collar has cracked.
1" Unions - Connect onto pumps or heaters with a 50mm thread diameter
2.5" Pump Unions - Connect onto pumps with a 90mm thread diameter