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Whale Watermaster caravan water inlet (Whale Watermaster socket)

Where Whale Watermaster socket is used, its real dimensions, and how to connect it.

Whale Watermaster socketThread standard
SystemWhale Watermaster mains water connection
Fits socketsWhale Watermaster and Truma Ultraflow inlets
Onboard thread3/4 inch BSP internal plumbing
Regulated pressurenominal 1.5 bar (max 1.8 bar)

Used on: UK and European touring caravans and motorhomes with a Whale Watermaster external inlet socket.

The Whale Watermaster connector clips into both Whale Watermaster and Truma Ultraflow inlet sockets, so the two brands are cross-compatible at the socket. Older Truma Crystal II sockets need a separate adapter. Onboard, caravan plumbing is 3/4 inch BSP for the mains inlet.

Quick-connect click fittings from Hozelock, Gardena and Karcher are proprietary and do not interchange. They all sit on top of a standard thread underneath, so the reliable way to move between brands is to adapt at the threaded tap or hose-end fitting, then use each brand's own connector above it.

Connect this fitting

Sources: Whale Watermaster caravan mains water connector (fits Watermaster + Truma Ultraflow) · Caravan water supply fittings, BSP thread sizes, Leisureshopdirect