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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.

40 item(s)
HTP255

2" 90 degree swept elbow pump union, sold individually.

£857 (£714 Ex. VAT)
+
1 item(s)
HTP291

2" 45 degree elbow pump union, sold individually.

£730 (£608 Ex. VAT)
+
15 item(s)
HTP257

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

£932 (£777 Ex. VAT)
+
29 item(s)
HTP256

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

£932 (£777 Ex. VAT)
+
30 item(s)
HTP172

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

£658 (£548 Ex. VAT)
+
36 item(s)
HTP311

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

£569 (£474 Ex. VAT)
+
12 item(s)
HTP414

1" pump union found on spas and hot tubs, fits Waterway Tiny Might pumps and others. Sold individually.

£457 (£381 Ex. VAT)
+
18 item(s)
HTP1245
£2024 (£1687 Ex. VAT)
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HTP1246
£1501 (£1251 Ex. VAT)
44 item(s)
HTP551
£547 (£456 Ex. VAT) £457
+
140 item(s)
HTP1797

Threads onto a 1.5" pump wet end and provides a 2" union connection.

£749 (£624 Ex. VAT)
+
134 item(s)
HTP1405

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

£679 (£566 Ex. VAT)
+
66 item(s)
HTP251
2" Split Heater Union Nut These 2 inch split heater unions nuts come complete with screws. Can be used to replace 2 inch unions from spa heater brands such as Balboa, Gecko, Hydroquip, Spa Builders. Inside thread diameter - 78mm
£329 (£274 Ex. VAT)
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4 item(s)
HTP1583
£1925 (£1604 Ex. VAT)
+
74 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)
+
2" HA440 Pump Union -2%
43 item(s)
HTP118
£618 (£515 Ex. VAT) £525
+