https://products.polletwatergroup.com/product/clack-ws1-25ei-time-down-flow-assembled-mixing-uk-transfo/
Clack WS1.25EI - Time - Down Flow Assembled - Mixing | UK transfo - Pollet Water Group
Clacks WS1.25 Automatic valve is a control head designed for residential and commercial applications. Its design and functioning is much the same as the WS1,