I recently had a kitchen extension built but I'm having problems with
the hot and cold water pressure. These were both ok before the
There are, I believe, 2 possible reasons for this:
1) The mixer tap: I can't now remember the specification for the tap
but it does have two very small flexible hoses that I'm concerned are
affecting the flow.
2) The sink only moved about 2 meters but the plumber used flexible
hose instead of copper embedded in the concrete kitchen floor. I'm
concerned that these hoses may have become partly crushed.
Which do you think is the most likely cause?
I think it's eminently possible that the flexi pies buried in the concrete
are the culprit. I'm astonished that a plumber would do that instead of
using copper. Is it concreted in, or did he just chisel out a duct for the
pipes? If they were concreted in, there's going to be a problem sooner or
later anyway, when the flexi pipes perish. I assume you mean the
rubber(neoprene or whatever) type with a wire braid outer sheathing?
Even if they're not crushed, I'm not convinced that they have the full 15mm
bore all the way through anyway, trying to remember last time I saw in the
end of one.
If they are not subject to mains pressure, and certainly the hot supply
won't be, they would restrict the flow.
I'm not a plumber, but I think your plumber is an idiot.
It's a new mixer tap with microbore pipe tails? Then it isn't meant for low
pressure water supplies at all. The inner head gear can be changed on some
styles of these taps, but you have to ask the makers or get the instruction
manual to find out if yours can.
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