|Brass ON / OFF Valve for shower valve replacement. This part is designed for replacement in suitable 3 dial thermostatic shower valves. This part is from the middle of the three dials (water on / off).
The main barrel is 28mm in diameter (at the widest part just behind the black washer) and overall length 80mm.
AquaLusso have produced this helpful video guide to show you have to replace the ON OFF valve