Thursday, Jul 21, 2011 at 19:29
As above reducing flow does not reduce pressure especiially when van tap is turned off.
Had a house that had 1100kpa??? of pressure Turning the supply tap nearly off did not fix the problem.
As soon as we turned the mixer off it still leaked.
Got a plumbing inspector in to
check and he confirmed that turning the tap nearly off had no effect whatever apart from reducing the flow.
Had to buy and install a pressure reducing valve to get it down under what the seals on the mixer could handle.
This from Yahoo answers
Is the problem low or high pressure? And are you talking about the actual water pressure (measured with a pressure guage attached to a hose faucet), or is the problem low water volume?
Contrary to what some posters have said, partially closing a valve does NOT reduce the STATIC pressure on the outlet side - it just reduces the flow. Static pressure is what ruptures supply hoses and causes valves to fail prematurely.
If your problem is high water PRESSURE (measured with a pressure gauge), the fix is a pressure regulator installed at your water inlet (or adjusting the existing one - sometimes they stick).
If the problem is low pressure, and you've opened up your pressure regulator (assuming you've got one), contact your water department and tell them that you're only getting XX lbs of pressure at the main.
If your problem is insufficient water FLOW--
-- If it's on both the hot and cold side, at all outlets, you've either got a restricted main valve (the old "gate" valves have a habit of sticking half-way shut when they've been closed and then re-opened), or corroded water pipes (do you have old iron water pipes?)
-- If only the hot water is slow at all outlets, look at the water heater's supply valve, or again, corroded pipes.
-- If it's only bad at one/some outlets, either bad supply valves/faucets at those locations, or, once again, corroded pipes.
FollowupID:
734216