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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.

42 item(s)
HTP83
£1480 (£1233 Ex. VAT)
+
24 item(s)
HTP118
£636 (£530 Ex. VAT)
+
3 item(s)
HTP230
£1272 (£1060 Ex. VAT)
+
43 item(s)
HTP551
£564 (£470 Ex. VAT)
+
33 item(s)
HTP552
£628 (£523 Ex. VAT)
+
16 item(s)
HTP1245
£2086 (£1738 Ex. VAT)
+
HTP1246
£1547 (£1289 Ex. VAT)
111 item(s)
HTP1581
£743 (£619 Ex. VAT)
+
4 item(s)
HTP1583
£1982 (£1652 Ex. VAT)
+
14 item(s)
HTP311

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

£586 (£488 Ex. VAT)
+
25 item(s)
HTP172

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

£677 (£564 Ex. VAT)
+
28 item(s)
HTP256

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

£960 (£800 Ex. VAT)
+
14 item(s)
HTP257

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

£960 (£800 Ex. VAT)
+
98 item(s)
HTP1405

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

£700 (£583 Ex. VAT)
+
53 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
£203 (£169 Ex. VAT)
+
65 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
£281 (£234 Ex. VAT)
+