Before I tile over the bathroom floor and I have access to the plumbing under the floor I was thinking of connecting my gravity CH stytem to the mains pressure and that way if I have any leaks on the bits of plumbing I've just put in I can fix them easily.
I was thinking of doing this because at some point I will change (I won't say 'upgrade' now) to a combi boiler which I believe will run the CH at mains pressure.
So would I just need to connect the CH drain to my hosepipe and isolate the header tank?
If I were doing this I should also test the HW system to mains pressure but I cannot think how to do this - any suggestions?