Crosswords9 mins ago
Wc Cistern Plumbing Query
Is there a reason (eg pressure) why the feed to a cistern should have to rise a certain amount? the pipework in my cloakroom comes down from upstairs, along the wall about 10" off floor, then rises up again to cistern. I would like to run the pipe along the wall at a slightly higher point (approx level with bottom of cistern) so I can add a supply to an outside tap but not sure if this will *** up the supply pressure to wc or sink?
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The supply to your cistern is classed as a "pressure pipe" and assuming it comes directly from the public supply then re-routing it as you describe would make absolutely no difference to the pressure at the (presumed) float valve in the cistern or any other tap, etc. in that room or elsewhere. Think of a garden hose and how it matters not if you stand watering the roses and somebody lifts off the ground the last couple of metres of it behind your back - no change in the performance.
Thanks Karl and TheBuilder. Re other discussion on outside taps, in my case the cloakroom is downstairs next to the door, with the cistern against the outside wall. So I would just be drilling through the brickwork and running a new section of pipe, off the existing feed to wc, to install an outside tap at the same level- hence no pipe outside either up or down. This is why I wanted to move the arrangement of the pipework inside.