Wait till you need a pcb for a grant combo oil boiler the factory whwere they’re made has gone up In smoke they’re like rocking horse crap to get hold of now and by the way grants throw pcb s for a hobby. Bob
Why not replace pump with a semi industrial one with a bigger head and flow
that will throw more water around I’ve done office blocks and it’s worked ok in the past. Bob
I remember a gas inspector years ago daft bugger struck a match looking for a leak and blew all the windows and doors out wonder he didn’t kill himself. Bob