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Old 06-12-2013, 15:08   #1
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Teeing diesel.stove overflow into engine overflow to main tank

I'd like to plumb my diesel cookstove overflow into the return to the main engine tank coming from the fuel filter on the Yanmar. Seems like simply teeing the stove overflow into the 3/8 line from the engine.would.work. But what about air issues for the Yanmar?

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Old 06-12-2013, 15:45   #2
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Re: Teeing diesel.stove overflow into engine overflow to main tank

What happens if you get back flow from the engine to the stove instead of from the stove to the line? Sound pretty scary to me. Unless you are absolutely positive it would work as planned I wouldn't try it. Better to run a separate line from the stove to the tank or to a catch tank.
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Old 06-12-2013, 15:47   #3
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Re: Teeing diesel.stove overflow into engine overflow to main tank

I would be worried about a few things.

1) when the engine is running it could either create suction on the line from the stove,
2) or push fuel out of the stoves return line.
3) if the stove was running and not the engine it could force fuel back into the engine thru the return line.
4) if both are operating at the same time could it over pressure the system.


I am far from a diesel mechanic, and am also a pretty poor plumber, but I don't think I would try this without some expert guidance.
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Old 06-12-2013, 16:09   #4
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I did consider the separate.catch tank which would work but with a smelly/messy factor I wanted to avoid. Going directly to the main tank from the stove would.require plumbing in a new female.fitting into a now.full 50.gal.tank. I have 1 existing fitting on the main that I need.for.the main tank vent...and...related issue...also.plan to use for venting the stove's gravity-fed day tank.

OK to combine the day and main vent?

Looks like it will be a separate catch jug for the stove...beats plumbing new fitting to the main.
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Old 06-12-2013, 16:09   #5
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Dpfrz highlighted my concern. What is to prevent the engine from flooding the stove?
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Old 06-12-2013, 16:11   #6
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Exactly sailmonkey. Glad I asked!
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Old 06-12-2013, 16:46   #7
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OK..one more option.

Would it.be safe to run the stove overflow downhill into the line venting.the.main and day tanks? I would tee into the line just above where it connects to the main. No backflow from the main up to the stove if the main is vented properly?
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