On Nov 3, 10:31*pm, Wingedcat wrote:
On 3 Nov, 18:16, "Fred" wrote:

"TheScullster" wrote in message

.uk...

Hi all

The CH header tank does not appear to drop significantly if the ball is
tied up.

How much, if tied up for a week or 2, how much does the level go down?

Can you not isolate each pipe in turn and pressure test it with a car
pump and a pressure gauge bought for the purpose from Screwfix?

http://www.screwfix.com/prods/72940/...-Tools/Pressur...

You would then be able to verify the integrity of the pipework without
digging up the floor - providing you can find somewhere to connect the
gauge for each of the pipes you mention (CH Flow and Return should be
achievable, DHW should also be possible, Mains cold water feed may be
a bit more problematical).

A bit of tinkering here and there to boxing in is a hell of a lot less
work than digging up an entire floor.

Running a surface pipe is a fair bit less work than digging it up.


I would be very surprised if the current damp problem is caused by
previously leaked water being driven to the surface, simply due to the
sheer volume of water involved if, as you say, the underlay is
literally wringing wet.

I wouldn't rule out the possibility that the dampness is caused by an
entirely new problem.

Luke

quite.


NT