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Old 10-24-2020, 11:37 AM   #21
Tundra 2014
Join Date: May 2018
Location: Texas
Posts: 958

The reason I limit pressure is so I can leave the compressor running and go from valve to valve opening and then closing faucet-one at a time.
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Old 10-24-2020, 11:44 AM   #22
PhD, Common Sense
Join Date: Feb 2017
Location: Fairborn, OH
Posts: 1,384
I donít know about air, but at 45 psi the water pressure drops only about 5 psi when I open a single faucet. Air probably drops more, but I donít know.

Still, for the reason cited in Tundraís post, having nothing open from time to time during the process, I limit my air pressure to 45.
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Old 10-25-2020, 06:49 AM   #23
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Join Date: May 2017
Posts: 321
Originally Posted by txredfish View Post
100 PSI would be too much air pressure on the lines. I am not how much PSI your lines can handle. I use about 40 PSI on mine and it is plenty to blow out the lines. I assume you can regulate the pressure on the pressure on the compressor you are looking at.
X2! Used the air pressure method with anti freeze in the p-traps the last couple years with no problems. Just keep your compressor pressure low. I keep it between 30 and 40 psi. Had a friend blow off a couple line fittings once because he didn't manage the air pressure
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pressure, winter, winterizing

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