On Sep 26, 3:31 pm, 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.

Hi,

If you get a 'Y' strainer installed after the rising main, this will
tell if the algae is from there or not.

If you have a garden hose which is left connected with the garden tap
on and hose nozzle off, it could be the source of the problem if the
tap has no non return valve.

cheers,
Pete.