S
sanj.varah
Sanj, you're confusing the location of the PRV with that of the T&PRV, which is in the top of the cylinder (at least in the UK). You should be very careful what you post about unvented cylinders. There may be some readers who will think that they can ignore the requirement for the T&PRV with potentially serious consequences.Looking at the diagram, I dont' see how that can be a "thermal relief valve" because its on the inlet side to the cylinder. So its unlikely it will see 100 celsius
From the diagram it looks as though its a PSV. Spring loaded to relieve at a pressure. Nothing to do with temperature.
My mum and dad's santon has the T&P valve in the side of the cylinder so i don't think it *has* to be in the top