None wrote:
On 27 Sep, 00:16, "clot" wrote:
None wrote:
Hello,

Basically we have a bacterial slime build up along our rising main,
which, when it flares up, makes our water slimy and horrible to wash
in/drink etc. It probably happened some years ago when the house was
left idle, ie stagnation occurred. The only thing that temporarily
helps is turning off the water at the outside stopcock, and back on
again after opening the garden tap. The water flows through at full
whack, and this clears the problem, albeit only for a few days...

Should I replace the whole rising main, or come up with something a
little more cost effective? Its doing me nut.

I need more information to understand what is going on. What do you
mean by a rising main? Is this from a public or private supply? If
from public, there should be sufficient disinfection to prevent
bacterial growth in the supply pipe. That you mention a stopcock
suggests a public supply - but not necessarily the case. I'm loath
to provide advice without a better picture of your situation.

Replacing the rising main would do nothing, if you have a continued
supply water quality problem. More info. please.

By rising main I mean the supply pipe from the outside stopcock
(driveway) to the attic tank and kitchen sink. It is from a public
mains supply, and the neighbours do not have this problem. When I
flush this pipe out through the back of the house at the highest
pressure possible, the water loses the 'sliminess.' There isn't much
of a chlorine residual, it was tested very low (0.02 mg/l or
something), so that has probably contributed.

I just find it strange that when I do this, that the quality improves
so much for a few days, then goes back to its previous state.

Sorry None, I should have checked your name before replying. Still
having the problem, I see. Does the water service accept that you have a
problem? I appreciate that your neighbours are not getting the same
difficulty, but it is possible that you are on a balance point as
previously discussed and thus receiving "old water" so that the chlorine
content has been all but consumed. It would seem to me that the main and
your service pipe are in need of an air scour. Could you see whether the
water dept. will do this?