<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Don’t know specifically on air lines, but sewer line recommend fall is 1/4”/foot with 1/8”/foot being the flattest slope. Remember that this slope is based on solid waste flow. <br>My air lines are hard copper with a slope of 1-1/2” in 20 feet. Even if the line is level, opening up the drain on the air line should produce enough flow to pull the water out of the lines. <div><br></div><div>Peace,</div><div>Pat</div><div><br><div dir="ltr">Pat Horne <div>We support Habitat for Humanity</div><div><br></div></div><div dir="ltr"><br><blockquote type="cite">On Mar 4, 2020, at 5:32 PM, Steve Hammatt, Mount Vernon WA USA via Shop-talk <shop-talk@autox.team.net> wrote:<br><br></blockquote></div><div dir="ltr">
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<div>I’m planning the airline system install in my new shop. It will be
</div>
<div>a circle pattern so that it will wrap round the entire room near </div>
<div>ceiling height. Is anyone familiar with the recommended pitch </div>
<div>or incline recommended for water (condensate) drainage to the </div>
<div>designated vertical drops for line blowdown?</div>
<div style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR: #000000">Steve
Hammatt<br>Mount Vernon WA
USA<br>www.leatherplates.com<br><br><br></div></div></div>
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