Pressure testing supply lines

[Newguy]

Does anyone know where to buy a tool that uses air (by way of a hand pump) to pressurize the water supply pipes,to test for leaks?
I've searched the net however, I do not believe I am using the correct terminology.
and what is everyone's view, on using air to test for leaks, is it sufficient?

thanks

[Jacksnap]

Water lines are tested for pressure by turning on the water with all fixtures off. Then open up each fixture and look for leaks. If you check with air pressure, you'll know if leaking by loss of pressure but it's difficult to detect the location of an air leak (Ever try to locate a 'slow leak' in a tire?). Not only the supply line but the drain/waste lines need to be checked for leaks by manually blocking waste water in the main drain/waste line. The waste water will back up and you look for leaks in waste fittings, flanges, etc.

[Roger]

I am curious why you are choosing air to test for leaks. Could you give details? This is done for plastic pipe, though it is not the preferred method and some precautions need to considered.

[suemarkp]

In the past, I've bought fittings that are a female garden hose thread on one end, and a schrader valve (tire valve) on the other. I've used this to blow out buried water lines with an air pump.

[Newguy]

Thanks for the info jacksnap :) Much appreciated

Roger I was just thinking that air would be a better choice, so as to avoid using water, because of having to drain it afterwards (winterize)

We will probably just have the water turned on anyhow, but I just wanted to check if anyone knew where to get such a tool.


thanks
newguy

[mdshunk]

I must have missed this thread originally. A pressure test with air is required by most inspectors before the pipework is filled with water. The adaptor to do so is not sold, it's made up in the field. You just get a 1/8 IPT x schrader adapter and add whatever bushings necessary to adapt it onto where ever you're tapping in. Don't forget to add in a TEE to install the gauge. Often, this is installed on an outside hose bib, water heater drain, washing machine faucet, etc. The pipework is pressureized to test pressure, gauge reading noted, and the pipework is left to sit for a day or longer and the gauge rechecked. You can round up all the material to make this rig up at the hardware store. Personally, I don't bother... turn on the water and run around and look for a leak. In a building where the unit below has a different owner or is otherwise occupied, you might want to stick with the air test first.