Afternoon all,
My circa 20yr old wet multi-zoned UFH system is playing up. Google tells me it’s likely down to a manifold pin. I’ve taken the actuator off for that zone and tried to manipulate the pin (inc use of silicone WD40), no joy, so it looks like I need to swap the manifold pin completely. Youtube seems to suggest it’s a fairly straightforward job and the part seems fairly cheap to buy but before I cock up and buy the wrong thing, are they a standard size or do I need to check what size mine is and go from there? Ta