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 > Using water pump to drain water.... bad idea?

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ThumperEXC

Crested Butte, Colorado

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Posted: 10/06/08 02:31pm Link  |  Quote  |  Print  |  Notify Moderator

Before winterizing my trailer, I open the 4 low point drain valves and the holding tank valve and turn on the water pump to "blow out" as much water as possible. Is this bad for the pump? Any other negative things by using this method?

Thanks


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ScottG

Bothell Wa.

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Posted: 10/06/08 03:00pm Link  |  Quote  |  Print  |  Notify Moderator

Won't hurt the pump at all but there will be a fair amount of water left in the system afterwards. You'll still need to blow out the lines or use antifreeze.


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Bumpyroad

Virginia

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Posted: 10/06/08 03:02pm Link  |  Quote  |  Print  |  Notify Moderator

I don't really see how the water pump will "blow out" the water. I would think it would just pump till the source dried up then stop pumping. water would still remain in the piping.
bumpy





SAR Tracker

Sandy Eggo, Calif

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Posted: 10/06/08 03:38pm Link  |  Quote  |  Print  |  Notify Moderator

Plus, the water acts as a lubricant and coolant for the pump. Run it dry for any significant length of time (say, 30 minutes), and you'll probably ruin the pump.


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08f450psd

Westminster, Maryland

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Posted: 10/06/08 04:25pm Link  |  Quote  |  Print  |  Notify Moderator

Use the low point drains until they run dry, then blow out the lines with an air compressor from the city water inlet, opening each faucet individually. Bypass the hwh, etc., and pump in the pink juice.

skipnchar

Topeka Kansas USA

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Posted: 10/06/08 04:29pm Link  |  Quote  |  Print  |  Notify Moderator

Won't hurt a thing but it's a pretty convoluted way of emptying the tanks. Opening the drain makes a lot more sense.


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PopBeavers

San Jose, CA

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Posted: 10/06/08 04:51pm Link  |  Quote  |  Print  |  Notify Moderator

When I am in a hurry to drain the fresh water tank, I have used the pump. Compared to just letting gravity drain it, it cuts the elapsed time by about 10 to one.

I figure it is no worse on the pump than a long shower.

Just make sure you are there to turn it off before it runs out of water and overheats the pump.


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Bigdog

silverdale wa.

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Posted: 10/06/08 05:22pm Link  |  Quote  |  Print  |  Notify Moderator

Gee,I'm glad I don't have to winterize my rig.. Living up here in the beautiful Pacific NW all we have to do is make sure we're rust and rain-proofed. I just roll in after a trip,hook-up to my shore power,clean the inside,drain the water and rinse the tt.Before we head out again,I reload the TT (actually we have some clothes and towels that get washed and returned to the TT so that we can leave at any time.),wash it and fill the on board tank 1/2 full and I'm ready to go...
No,I don't blow it out and I DON'T use the water pump to pump it out as it got left on once and burned up.


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wa8yxm

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Posted: 10/06/08 06:04pm Link  |  Quote  |  Print  |  Notify Moderator

As others have said, No more damage to the pump than pumping that many gallons for consumption/flushing/shower/and so on.

However WHY when you can just open the tank drain.. Yes,,, there is one.. Or two in my case (I was not happy with the factory drain and put in my own)


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Horsedoc

Dixie --- N. Georgia

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Posted: 10/06/08 07:28pm Link  |  Quote  |  Print  |  Notify Moderator

On our present coach, we have no 'main drain' that I have found. There is a low point drain (1/2 inch maybe?) but our previous coach had what appeared to be an 1 1/2 inch drain with a valve with rod from the valve to the water bay.
It takes quite a while to drain several inches of water from the tank if you don't use the pump.

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