How do you prime water pump?? - Fiberglass RV

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Old 05-26-2013, 06:28 PM   #1
Name: Larry
Trailer: trillium4500
New York
Posts: 42
How do you prime water pump??


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Old 05-26-2013, 06:34 PM   #2
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Donna D.'s Avatar
Name: Donna D
Trailer: Escape 5.0 TA, 2014
Posts: 24,540
No need to yell and you're putting my eyes out

Someone will be along to help you shortly. I've never used the pump in my trailer...

Donna D.
Ten Forward - 2014 Escape 5.0 TA
Double Yolk - 1988 16' Scamp Deluxe
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Old 05-26-2013, 06:44 PM   #3
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Name: Carol
Trailer: 22' Airstream Formerly 16' Scamp
British Columbia
Posts: 11,730
Larry, if you use the search function at the top of this forum (use the bottom google box for best results) you will find lots of threads on the topic.

If you plug the end of the faucet with your finger while pumping, you might get it to prime. If not its then pump has issues - if an old one that has been used in awhile it may need new seals or a good cleaning out, amongst other things.
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Old 05-26-2013, 07:01 PM   #4
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mszabo's Avatar
Name: Mike
Trailer: 1986 Bigfoot FT20
Posts: 729
Loosing the fitting that goes into the pump while its running.
This will break the vacuum.
I'm bad, though it was a electric pump. Da!
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Old 05-26-2013, 07:04 PM   #5
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Larry C Hanson's Avatar
Name: Larry H
Trailer: Trillium
Posts: 316
Check valves

Hello Larry,
I had to rebuild the hand pump in my '78 Trillium.
However, the hand pump still required many strokes
to get water from the tank to the sink because
hand pump was not air tight and let the water in
the line flow back to tank. The problem was solved
by installing a check valve about a foot below the
pump. Now water is right there... one stroke of the
pump handle starts water flowing from the pump spigot.

Here is a source for the check valve:

1/4" PP Standard Check Valves | U.S. Plastic Corp.

Larry H
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