"None" wrote in message
...
On Jun 23, 4:14 pm, None wrote:
On Jun 23, 3:15 pm, "Toby" wrote:



None wrote:
On Jun 23, 2:58 pm, "Toby" wrote:
None wrote:
On Jun 23, 1:58 pm, "Toby"
wrote:
Thanks for the detailed advice chaps, I think I will do
neverwas'
stopcock experiment first. What seems to happen is the tap
that
is put on first at full whack will have minimal debris,
while
the tap that is opened second (also at max but with a
trickle
flow) will be filled with it. I guess when I get home I'll
have
to play around and see what happens when both taps are on
at
half power etc.

Ok, just went home for lunch hour and tested this out.
Whether or
not the tap in our side passage is opened first or second,
it is
the tap which is allocated the pressure. So, if I run the
kitchen
tap full whack then nip outside and open the side passage
tap to
full, it comes on at full pressure while the kitchen tap
will
trickle. And interestingly, a load of dirt comes out of the
side
passage tap at the high pressure in addition to the kitchen
tap's
dirt content with the trickle flow.

I hope I'm making sense, I'm finding this tough to
explain...

Makes sense to me!

Just had another thought - what type of boiler do you have in
your
property? Is it a sealed system with a pressure guage on or
near
the boiler?

If so, what is the pressure showing on the gauge when all
your taps
are off, then again after you turn the water off in the road
and
then run the taps to relese any pressure in the system?

Toby...

No, its not a sealed system, regular old boiler....

Okay - so you should have a smaller header tank for the boiler?
Is the water inlet to this tank above the water level?

Toby...

Do you mean the small expansion tank beside the main water tank
in the
attic?

Yes, this one keeps your radiator circuit topped up, and absorbs
any
contraction and expantion in the system due to the water heating,
so may
contain nasty brown water!

This tank will have a mains water feed to it, but this must be
above the
water line, just like the main tank - is it?

Toby...

I'll have a check when I get home... its tricky to get to, as the
flooring aint the most secure up there. But surely that couldn't be
siphoning water down to the tap?!

Just in the door now and checked the expansion tank... water level is
definitely below the mains inlet just like attic tank.


OK a long shot, but MANY years ago I had an odd 'dirty water' issue
having recently moved into a house 'done up' by a builder. He had
connected the hot cylinder the wrong way round so the coil from the
boiler was infact the hot water source, and the boiler water was
circulating in the jacket that should have been the coil. Nothing
showed up until I turned off the water feed to change a tap washer,
but the water carried on flowing then got very dirty and the radiators
started gurgling. Builders - don't you love 'em G

AWEM