thanks for the answers, unfortunately cant get underneath either, it's concrete slab and double brick with piping embedded in the wall. plumber may be the only answer,

Thanks - that is what I have but how does that stop the hot and cold water mixing inside the wall behind the faucet fitting. Do I leave half the…

Hi Guys,
Hoping someone can help. I have searched but cant find an answer to this on the internet. maybe not using the correct terms
I have 60's brick laundry with hot…