07:06AM | 04/14/05
Member Since: 04/13/05
1 lifetime posts
I have extremely low water pressure. The city has tested and their results are in flow only. They claim a rate of 11 gpm at the meter.

At the nearest external spigot to supply cut-off valve (2 ft 9" distant) I read static pressure of 24psi, dynamic of 4 with only that valve open. with second open faucet I read 0-2lb on static.

With no other water usage, I can't make a lawn sprinkler occilate. Do you believe this is supply line from meter to house (meters are encased in the sidewalk, no consumer access) or too low city supply. (nextdoor neighbor has same complaint, houses are of same age)


06:11PM | 04/17/05
Member Since: 04/01/05
47 lifetime posts
If the city is reading 11gpm at the meter and just inside you have really low pressure then it is time for a new water service coming into the house. Has the house been repiped? Is there old galv. steel pipe coming in? Is the main valve coming into the house clogged? There is one other way to correct this problem and that is to install a retention tank for volume and a pressure booster pump. A pressure booster pump alone will not do it because of the supply. This is why a retention tank would be required.


09:08AM | 04/23/05
Member Since: 08/29/04
227 lifetime posts

Just for your reference, a good water pressure is 45 to 60 psi with a 50 to 100 gpm flow. Most faucets take at least 2 gpm to work efficiently. You have both a flow problem and a water pressure problem. Make sure the city tests the water at the nearest fire hydrant to see what the available water pressure is in the area. If it 25 psi, replacing the service may or may not give you a good result. You would have to install at least a 1" water supply line from the street to have enough flow for the whole house.

A pressure booster system, could be designed but make sure you get a couple of quotes on the new water service or booster system before you decide.

Good Luck

Raymond VinZant Plumbing Prof.


11:10AM | 04/23/05
Member Since: 01/30/05
361 lifetime posts
usually water main supplies to the house are 1" dia, but the meter itself is 3/4", (as the meters can then register properly in low flow situations like yours). It seems strange that your city is happy to only provide you with 11 gallons per minute supply, are you in drought ravaged Southern California?

It could be that your meter is clogged with sediment as well, since you have such low flow only 2 feet from the meter, or a bad shut-off valve on your side of the meter. One also wonders if they didn't open the valve in the "buffalo box" or if there's a malfunction there. All I'm saying is make sure everything is a-okay on the CITY side of things before you go investing in fixes you may not need yet.



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