Apologies for jumping in on your previous tread, it's my first time joining a forum so I am not 100 % sure about the protocol and how to post questions.
I examined the pipe work from the slab to the manifold its absolutely perfect, I'll send photos after my next site visit.
Their was no fire damage to the ground floor and 95% of the first floor joists are without fire damage the bulk of the damage was confined to the roof.
The manifold was removed , I was going to blow air down the lines to figure out the flow and return and then hook up a new manifold and
run a pressure test - what's the recommended pressure to use ?