JT wrote:
I noticed a drop in pressure in all taps around the house. A blockage
somewhere would make sense, but if it's affecting all the taps, then
it must be a blockage nearer the mains source. It seems a bit rubbish
that our plumber that came to have a look didn't suggest that as a
problem and just said 'nah, you've got to replace all the 15mm'.

The other thing is that it was good for a couple of weeks first. Is
there a chance that some kind of debris could have broken off from
somewhere inside the pipework?

Erm - that's what I suggested last time! But less plausible I suppose
given that all the taps are affected; any blockage would be most likely
to be at a bottlneck, ie a valve or tap.

David



JT wrote:

We've recently had a loft conversion done, and at the start of the
construction we had a main fed hot water system put in (Megaflo).
Immediately after that was put in, I noticed a fantastic increase in
the water pressure in the shower and all the taps around the house.
The shower was barely useable at full blast.

Strangely, a couple weeks later the pressure dropped again. It was
still pretty good but no where near as it was before, but it was
useable so I didn't think twice about it.

Well, if it was formerly OK and suddenly dropped, then surely you're
looking at a physical blockage somewhere, eg a bit of debris (left in
the pipework by the plumber) having detached itself and migrated to
somewhere critical. Is it just the loft shower that's got the problem?
The shower valve is likely to have a filter on the incoming pipes; can
you remove the valve and check that there's nothing in there?

David