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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
£7.13 (£5.94 Ex. VAT)
73 item(s)
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1"_Hydroair_Union_Complete
1" Hydroair Union Complete - Genesis Air Blowers
£7.03 (£5.86 Ex. VAT)
27 item(s)
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-23%
1.5 Inch Hydroair Pump Union
1.5 Inch Hydroair Pump Union
£4.45 (£3.71 Ex. VAT)
24 item(s)
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-3%
1.5 Inch Socket Union
1.5 Inch Socket Union
£13.25 (£11.04 Ex. VAT)
56 item(s)
− +
-11%
1.5 inch Socket Union (M Thread to F Socket)
1.5 inch Socket Union (M Thread to F Socket)
£10.49 (£8.74 Ex. VAT)
31 item(s)
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-10%
1.5"_Heater_Union_Tail_Peice
1.5" Heater Union Tail Piece
£1.68 (£1.40 Ex. VAT)
99 item(s)
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-6%
1.5"_Split_Heater_Union_Nut
1.5" Split Heater Union Nut
£3.17 (£2.64 Ex. VAT)
53 item(s)
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-16%
2 Inch Davey Pump/Heater Union (Sold in Pairs)
2 Inch Davey Pump/Heater Union
£45.54 (£37.95 Ex. VAT)
2 item(s)
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-14%
2 Inch HA440 Pump Union
2 Inch HA440 Pump Union
£5.39 (£4.49 Ex. VAT)
21 item(s)
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2 Inch Socket Union
2 Inch Socket Union
£16.14 (£13.45 Ex. VAT)
16 item(s)
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2 Inch Socket Union (with Female Thread)
2 Inch Socket Union (with Female Thread)
£22.61 (£18.84 Ex. VAT)
2 item(s)
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-12%
Balboa_Heater_Union_Complete
2" Balboa Heater Union Collar & Tail Piece
£6.22 (£5.18 Ex. VAT)
78 item(s)
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-11%
2"_Heater_Union_Tail_Peice
2" Heater Union Tail Piece
£2.31 (£1.92 Ex. VAT)
109 item(s)
− +
-11%
2"_Split_Heater_Union_Nut
2" Split Heater Union Nut
£2.79 (£2.32 Ex. VAT)
78 item(s)
− +
-11%
2"_Split_Pump_Union_Nut
2" Split Pump Union Nut
£5.74 (£4.78 Ex. VAT)
84 item(s)
− +
2" to 1.5" Threaded Union Adapter
2" to 1.5" Threaded Union Adapter
£7.45 (£6.21 Ex. VAT)
114 item(s)
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2" to 2.5" Face Plate Adapter
2" to 2.5" Face Plate Adapter
£9.00 (£7.50 Ex. VAT)
107 item(s)
− +
-14%
50mm Hydroair Pump Union
50mm Hydroair Pump Union
£4.72 (£3.93 Ex. VAT)
19 item(s)
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-7%
1"_Spa_Pump_Union
Pump Union 1"x 1" Socket
£4.05 (£3.37 Ex. VAT)
10 item(s)
− +
-10%
1.5"_Spa_Pump_Union
Pump Union 1.5"x 1.5" Socket
£4.85 (£4.04 Ex. VAT)
14 item(s)
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2-Inch_Spa_Pump_Union
Pump Union 2"x 2" Socket
£7.01 (£5.84 Ex. VAT)
48 item(s)
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2.5"_Pump_Union_With_2"_Socket
Pump Union 2.5" x 2" Socket
£9.89 (£8.24 Ex. VAT)
19 item(s)
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2.5_Inch_Spa_Pump_Union
Pump Union 2.5" x 2.5" Socket
£9.91 (£8.26 Ex. VAT)
16 item(s)
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Waterway_2"_45_Degree_Male_Pump_Union
Waterway 2" 45 Degree Male Pump Union
£7.74 (£6.45 Ex. VAT)
24 item(s)
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1 2