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- over 420,000 Posts - PlumbingForum.com -
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Author:
alpo (NJ)
What are some of the causes that would cause a 40 gal propane water heater to catch fire underneath where the burner is?
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Author:
hj
A gas leak, a plugged burner tube, or a plugged center flue so the flames cannot flow up through the heater.
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Author:
Shoemaker2 (MA)
Good chance a spider left his eggs in your orifice.
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Author:
hj
Haven't seen this happen in the past 45 years or so, and usually only on devices that have been turned off for the season.
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Author:
m & m (MD)
"her" eggs.....
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Author:
Shoemaker2 (MA)
Ya I find it a lot in pool heaters too. They leave some kind of silk sack that the gas has trouble getting though, so the gas collects and starts a fire ball.
I had almost last my eyebrows from it back before I knew enough to check before lighting.
Edited 2 times.
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Author:
hj
Back in the 60's we installed many through the wall direct vent gas space heaters. In the fall the pilots would not light. I found that the spiders had spun a web INSIDE the pilot orifice and the pilot had to be taken apart to get inside it. Now what was a TINY spider.
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