Latest Discussions : Plumbing


01:10PM | 05/12/04
Member Since: 05/11/04
1 lifetime posts
My grandmother has a old green ***** pressure tank.

I can not read the model number off the tag.

Glass lined verticle

Hydro Pneumatic pump tank

Test PSI 175

Working PSI 75

The pressure guage reads 40.

The water intake is on the left and has a air valve on the pipe before the


Water Outtake is on the opposite side.

Pressure guage fitting is on the front.

Anyone know the steps on bleeding/or fill the tank with air. I don't want to

rupture anything.

Whenever a cold water outlet gets used it periodically makes noise, then air comes out.

Then it's fine for awhile and starts up again.


Gary Slusser

09:22AM | 05/16/04
Member Since: 02/17/04
112 lifetime posts
Most pressure tanks of that type have a means of adding air while they operate. Either an air volume control (AVC) with a float inside the tank or a snifter valve in the plumbing going into the tank; usually on a check valve and the pressure switch may be installed on it too. If those things tha tadd air aren't working, you should replace them.

If there are none of those things you shut off the pump and simply drain the water out of the tank allowing air in as you do so and then turn the pump on. You allow air in by opening a faucet higher than the tank. When drained, it would be an excellent time to flush the tank by turning the pump of for a slow count to 5 and shutting it off allowing all the water to drain out watching for dirty water as the water stops flowing. The fully drain the tank you must keep the end of the hose level with or below the drain valve.


Quality Water Associates

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