W4 Stem Shut Off Valve 12mm (31272)

W4 Stem Shut Off Valve 12mm - Caravan & Motorhome Water System

Isolate any section of your caravan or motorhome 12mm water supply quickly and easily with the W4 stem shut off valve. The screw-stem design allows gradual opening and closing rather than the abrupt quarter-turn action of a ball valve — useful where you want finer flow control or need to reduce water hammer in the system.

Key Features

• 12mm fitting — suits the standard internal plumbing size for caravans and motorhomes
• Stem (screw-type) operation — gradual open/close for fine flow control
• Inline installation — fits directly into the 12mm water supply pipework
• Allows isolation of individual water circuits for maintenance or winterisation
• Durable plastic construction
• W4 brand — part number 31272

Stem Valve vs Ball Valve

Stem shut-off valves use a threaded stem that compresses a seal progressively. This provides finer flow control and a gentler closing action compared to a ball valve. Ideal for installations where abrupt valve closure causes pipe knock (water hammer), or where partial flow reduction is needed.

Installation

Fit inline in the 12mm supply pipework at the desired isolation point. Ensure connections are secure and leak-free before restoring water pressure to the system.

Part number: 31272  |  Barcode: 5019328312721