Hot Tub parts sold to trade professionals

Please note: The UK and French offices and warehouses will be closed on Monday 1st May for the bank holiday and will reopen on Tuesday 2nd May.

Pumps and Pump Parts

It is often confusing when sizing a pump union. All the pumps in this section are sized as per USA imperial pipe size reference. Although we refer to 2 inch, 1.5 inch and so on, often the outside diameter of the threaded connection on the inlet and the outlet of the pump will be bigger than the size referred to. The term 2" or 1.5" etc. is more a reference to the union sleeve which is connected to the pipe work.

When we state an inlet and outlet size the information below will apply.
2.5 inch = 90mm Ø, 2 inch = 75mm Ø, 1.5 inch = 62mm Ø, 1 inch = 48mm Ø.