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Pipe Unions

Pipe Unions

Plumbing Unions

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
1.5" Unions - Connect onto pumps or heaters with a 62mm thread diameter
2" Unions - Connect onto pumps or heaters with a 78mm thread diameter

2.5" Pump Unions - Connect onto pumps with a 90mm thread diameter
Sort Alphabetically: A to Z
24 Per Page
1 Inch Socket Union
1 Inch Socket Union
£7.43 (£6.19 Ex. VAT)
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1"_Hydroair_Union_Complete
1" Hydroair Union Complete - Genesis Air Blowers
£7.33 (£6.11 Ex. VAT)
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1.5 Inch Hydroair Pump Union
1.5 Inch Hydroair Pump Union
£6.28 (£5.23 Ex. VAT)
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1.5 Inch Socket Union
1.5 Inch Socket Union
£14.80 (£12.33 Ex. VAT)
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1.5 inch Socket Union (M Thread to F Socket)
1.5 inch Socket Union (M Thread to F Socket)
£12.72 (£10.60 Ex. VAT)
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1.5"_Heater_Union_Tail_Peice
1.5" Heater Union Tail Piece
£2.03 (£1.69 Ex. VAT)
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1.5"_Split_Heater_Union_Nut
1.5" Split Heater Union Nut
£3.65 (£3.04 Ex. VAT)
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2 Inch Davey Pump/Heater Union (Sold in Pairs)
2 Inch Davey Pump/Heater Union (Sold in Pairs)
£58.91 (£49.09 Ex. VAT)
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2 Inch HA440 Pump Union
2 Inch HA440 Pump Union
£6.36 (£5.30 Ex. VAT)
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2 Inch Socket Union (with Female Thread)
2 Inch Socket Union (with Female Thread)
£19.82 (£16.52 Ex. VAT)
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Balboa_Heater_Union_Complete
2" Balboa Heater Union Collar & Tail Piece
£7.64 (£6.37 Ex. VAT)
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2"_Heater_Union_Tail_Peice
2" Heater Union Tail Piece
£2.81 (£2.34 Ex. VAT)
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2"_Split_Heater_Union_Nut
2" Split Heater Union Nut
£3.38 (£2.82 Ex. VAT)
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2"_Split_Pump_Union_Nut
2" Split Pump Union Nut
£7.00 (£5.83 Ex. VAT)
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2" to 1.5" Threaded Union Adapter
2" to 1.5" Threaded Union Adapter
£7.72 (£6.43 Ex. VAT)
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2" to 2.5" Face Plate Adapter
2" to 2.5" Face Plate Adapter
£8.63 (£7.19 Ex. VAT)
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50mm Hydroair Pump Union
50mm Hydroair Pump Union
£5.64 (£4.70 Ex. VAT)
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ESPA Pump Union (WIPER3)
ESPA Pump Union (WIPER3)
£20.86 (£17.38 Ex. VAT)
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Marquis Spas 1.5" Heater Union Tailpiece (Male Slip)
Marquis Spas 1.5" Heater Union Tailpiece (Male Slip)
£5.10 (£4.25 Ex. VAT)
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1"_Spa_Pump_Union
Pump Union 1"x 1" Socket
£4.70 (£3.92 Ex. VAT)
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1.5"_Spa_Pump_Union
Pump Union 1.5"x 1.5" Socket
£5.86 (£4.88 Ex. VAT)
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2-Inch_Spa_Pump_Union
Pump Union 2"x 2" Socket
£6.77 (£5.64 Ex. VAT)
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2.5"_Pump_Union_With_2"_Socket
Pump Union 2.5" x 2" Socket
£9.60 (£8.00 Ex. VAT)
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2.5_Inch_Spa_Pump_Union
Pump Union 2.5" x 2.5" Socket
£9.60 (£8.00 Ex. VAT)
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