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Old 12-29-2015, 03:28 PM   #1
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Join Date: Jun 2015
Location: On the road between Maine and Florida
Posts: 291
Rotary or diaphragm pump in the water pump?

When I headed south and de-winterized my camper, I forgot to shut off the antifreeze pickup tube valve and left the hot water plumbing drain open.

When I first turned on the water pump I got a few spurts then nothing. I thought that maybe the pump had to prime itself and the system so I let it run for a couple minutes. When nothing more happened I looked into the plumbing compartment and double checked everything, finding the open valve on the antifreeze pickup tube. I shut that and went back into the camper and still little to no water....then I looked outside and saw the puddle After shutting off the hot water plumbing drain everything works OK.

My question is did I cause any damage to the water pump by letting it run for 5 minutes or so with the antifreeze pickup valve open? I think some water from the freshwater tank may have made it's way into the pump just by gravity. I didn't know if the pump is a rotary vane type or diaphragm type pump. If it's rotary vane then I'm really worried that I may have damaged it. If it's a diaphragm type pump (I've never had one of those types) does running it dry damage it like running a rotary vane pump would?


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Old 12-29-2015, 04:01 PM   #2
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I don't know the type, bot running like that should not hurt. Total time on mine must be at least a half hour just waiting to prime after filling the tank. I believe I read on here they are designed for that.

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Old 12-29-2015, 04:04 PM   #3
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Join Date: Sep 2010
Location: Eastern Ontario
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Usually FR use Shurflo water pump which are diaphragm type.....I would not worry about it.
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pump, water, water pump

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