

| Subject: | Re: How to diagnose a propane regulator? |
| From: | David Beierl |
| Date: | Thu, 7 Jun 2001 23:40:04 -0400 |
At 09:39 PM 6/7/2001, Joel Cort wrote: >If I remove the brass tubing pipes going from the regulator to the >burners and the fridge I get propane hissing out. When I reconnect >the lines .... nothing at the burner. > >Do the symptoms described here characterized a bad propane >governor/regulator? Short answer: Probably. Make a U-tube manometer (10 feet of clear tubing with a U-bend giving two vertical legs at least three feet high, with at least 18-inch depth of water in the bottom of the U ). Secure it to a board or similar so you can keep it roughly vertical. Apply the end to the regulator output and open gas valve. Let a little gas escape, then reapply, and measure the [precisely] vertical distance between the meniscii of the water -- the specification is 11 inches difference between the two, *not* 11 inches drop in one side or rise in the other (this is about 6 oz per square inch). If you get 11", look for pipe blockages?? I'm guessing you won't, and that you need a new Marshall Brass 260 (exact repl, no longer made) or 290 (two inches longer, a nuisance but you can bend the tubing carefully). The regulator is adjustable by turning a plug in the large (low-pressure) section, but it shouldn't change calibration much once it's set... david David Beierl - Providence, RI http://pws.prserv.net/synergy/Vanagon/ '84 Westy "Dutiful Passage" '85 GL "Poor Relation"
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