Some of you will remember that I have a strange gushing water sound coming
from the pipes in the garage. They resonate upstairs too. Well, after
turning off the tap in the road the noise stopped. This meant that there was
a problem between the service pipe and the stopcock. I found an inspection
chanber in the garage and lifted that, it contained another stopcock
(presumable the old one for the house before the renovations). this was 18
inches deep in standing water! Bearing in mind that the water table is much
lower that that, I think I can safely say that this is not right!
We dug up a portion of the garage floor (5 inches of concrete with 1/4 inch
steel reinforcing mesh!) and have now found that the water pipe splits just
past the edge of the inspection chanber. It travels north (just pretend
bearings so you get the picture - not even I am sad enough to measure
that!!) and then veers off north west away from the house. The other one
goes east adn enters the house. This will be my rising main.
My sort of question is that why on earth would I have a split like this? I
can only assume that the house may have had an outside toilet at some time,
but would it get fed like this?
I'm also guessing that the leak is most likely at the end of the north west
branch whjere they have capped it off badly.
Does it sound like I am on the right track?
If it was me, (and I was sure the 'branch' was not feeding anywhere
else), I would cut out the garage stop cock and branch section, and
replace with a straight pipe, joining the incoming and house feed.
Leave the existing cut out section in place though, just in case, so
it would be possible to replace it if necessary.
On Sun, 9 Nov 2003 09:42:06 -0000, Gavin Gillespie wrote:
Erm the T and branch are under the floor not in the chamber. The OP
doesn't say that the noise stops if the garage stopcock is closed,
though I guess this would this have been the reason for starting to
dig up the floor heading in the direction of the house...
Certainly cutting the branch and capping the stub is a first step then
making sure the noise has stopped, at this stage the leak could be in
either length. If not already done it's proably worth checking that
the street and garage stopcocks don't shut of your neighbours water as
well before finally disconnecting the branch...
Dave. pam is missing e-mail
Yes, when I turn off the garage stopcock the noise stops.
We have capped off the stub pipe and unfortunately the noise still goes on!
Bugger! The next plan is to dig back to the inspection chamber and to
replace the whole tapand then route this as a new feed into the house. We
can then join replace the join onto the rising main with a new one that we
know doesn't leak. If it still leaks and the noise is still there, then we
may have to go back to the street :o( !!
Ooops! Yep, would have been a good idea, but we have had the water off for
36 hours no and no sign of a complaint! The houses are a fair distance from
me and all appear to have a street service pipe stopcock, so I am fairly
sure this is just a remnant from before.
There should be no need to go back to the street, as the noise should
be further down the line than the last stop cock isolated, i.e. the
garage stop cock. Would it be possible to put a temporary length of
strong hosepipe, from the garage stop cock to the house stop cock,
this would prove that the leak is in that section, (which it seems
that it must be), and it would also give you a temporary water supply
whilst the excavation work is carried out.
On Sun, 09 Nov 2003 12:21:38 GMT, Mike Hibbert wrote:
If you replace the length from the house interior to to garage
stopcock and the garage stop still controls the noise then something
weird is going on. Assuming no demand for water in the house. You did
test the garage to house length with the house cock off?
You mentioned elsewhere a change from lead to copper at an unknown
location, my bet would be that joint.
And plastic yes, the blue stuff I'd use 28mm. As you have a lead
service pipe it might be worth getting touch with the local water
board. Some have/had schemes where they would replace lead service
pipes for free if there was no lead in the property anymore...
Dave. pam is missing e-mail
Is the house of an age where the pipe is lead, or steel or ???
Could there have been another property or possibly a business of some
sort at some time? For example, many years ago my parents lived in
an Edwardian house with a similar house next door. However, at some
time in the past, the space behind the house had been a dairy and
although most of the buildings to do with it and long since gone there
was a remaining one which had probably been the stable. This had
services such as a separate water and electricity supply.
Alternatively, is it possible that the pipe you mention feeds another
property? One clue might be if surrounding properties are of a
Certainly if the house had an outside toilet at some time, it's quite
possible that it would have been fed separately. When you are
digging, look out for old salt glazed drain pipes which may not be too
far away from the water services.......
To email, substitute .nospam with .gl
have you turned on the stopcock back on up at the road and then turned the
stopcock in the garage on and off to see if the gushing sound repeats?, me I
would leave the stopcock in place and just cap off the split end you don't
require. How long was it turned off for, did any neighbours complain later
about intermittent water?
I just completed a repair job for some clients, they had gallons of water
leaking under their extension, it took five years for them to notice that
there was a problem. I added stopcocks to all the houses that were affected,
so they could all isolate their properties as the water main was a shared
water main that ran accross all the properties.
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