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Unions

Unions

Welcome to the pipe unions section of our store.

We stock all sizes of spa pipe plumbing unions such as heater unions, socket unions, pump unions 1 inch, 1.5 inch, 2 inch, and 2.5 inch along with all other types and sizes designed to fit Aqua-flo, Hydroair, LX and Waterway hot tub pumps.

Here is a quick guide to the approximate outside thread diameters of pump connections,

1.5" unions: 63 mm OD, 2" unions: 78 mm OD, 2.5" unions: 93 mm OD.
Newest Items First
16 Per Page
1.5" Socket Union
1.5" Socket Union
42 item(s)
HTP83
£1436 (£1197 Ex. VAT)
+ −
Add to cart
2" HA440 Pump Union -2%
2" HA440 Pump Union
40 item(s)
HTP118
£618 (£515 Ex. VAT) £525
+ −
Add to cart
1.5" Socket Union (M Thread to F Socket)
1.5" Socket Union (M Thread to F Socket)
5 item(s)
HTP230
£1235 (£1029 Ex. VAT)
+ −
Add to cart
50mm Hydroair Pump Union
50mm Hydroair Pump Union
44 item(s)
HTP551
£547 (£456 Ex. VAT) £457
+ −
Add to cart
1.5" Hydroair Pump Union
1.5" Hydroair Pump Union
33 item(s)
HTP552
£610 (£508 Ex. VAT)
+ −
Add to cart
ESPA Pump Union (WIPER3)
ESPA Pump Union (WIPER3)
18 item(s)
HTP1245
£2024 (£1687 Ex. VAT)
+ −
Add to cart
ESPA Pump Union (WIPER0)
ESPA Pump Union (WIPER0)
HTP1246
£1501 (£1251 Ex. VAT)
Out of stock
1" Socket Union
1" Socket Union
118 item(s)
HTP1581
£721 (£601 Ex. VAT)
+ −
Add to cart
2" Socket Union (with Female Thread)
2" Socket Union (with Female Thread)
4 item(s)
HTP1583
£1925 (£1604 Ex. VAT)
+ −
Add to cart
1.5"_Spa_Pump_Union
Pump Union 1.5"x 1.5" Socket
34 item(s)
HTP311

1.5" pump union found on spas and hot tubs, fits most brands of pump. sold individually.

£569 (£474 Ex. VAT)
+ −
Add to cart
2-Inch_Spa_Pump_Union
Pump Union 2"x 2" Socket
30 item(s)
HTP172

The most common 2" pump union found on spas and hot tubs, sold individually.

£658 (£548 Ex. VAT)
+ −
Add to cart
2.5"_Pump_Union_With_2"_Socket
Pump Union 2.5" x 2" Socket
24 item(s)
HTP256

2.5" pump union for the larger Waterway wet end suctions, sold individually.

£932 (£777 Ex. VAT)
+ −
Add to cart
2.5_Inch_Spa_Pump_Union
Pump Union 2.5" x 2.5" Socket
14 item(s)
HTP257

2.5" pump union for the larger Waterway wet end suctions, sold individually.

£932 (£777 Ex. VAT)
+ −
Add to cart
2"_Split_Pump_Union_Nut
2" Split Pump Union Nut
132 item(s)
HTP1405

Perfect for repairing a cracked spa pump union nut, fits all 2" pump wet end connections.

£679 (£566 Ex. VAT)
+ −
Add to cart
1.5"_Heater_Union_Tail_Peice
1.5" Heater Union Tail Piece
75 item(s)
HTP674
1.5" Heater Union Tail Piece These 1.5 inch heater union tail pieces are plumbed on to the end of 1.5 inch pipe work. Enabling you to connect and seal a 1.5 inch metal spa heater assembly to the pipe work with the addition of a split collar and O'Ring gasket. Internal pipe connection - 1.5" (48.5mm) External thread diameter -  63mm
£197 (£164 Ex. VAT)
+ −
Add to cart
2"_Heater_Union_Tail_Peice
2" Heater Union Tail Piece
72 item(s)
HTP252
2" Heater Union Tail Piece These 2 inch heater union tail pieces are plumbed on to the end of 2 inch pipe work. Enabling you to connect and seal a 2 inch metal spa heater assembly to the pipe work with the addition of a split collar and O'ring gasket. Internal pipe connection - 2" (60mm) Outside thread diameter - 78mm
£272 (£227 Ex. VAT)
+ −
Add to cart
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