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Old 11-24-2015, 06:17 PM   #1
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Pump won't pull antifreeze {OP reports 'problem solved'}

Trying to figure out if my pump is broken or if I've done something wrong. I've never used the pump with the exception of testing it when I got the camper last year and it pulled from the fresh water tank fine. It hasn't been in freezing conditions since that test. The pump seems quiet. I disconnected the inlet line and there doesn't seem to be much suction. Following is a list of things I've done (maybe not in that order):

Drained all the tanks
Bypassed and drained the water heater
Drained all the lines (opened low water points)
Removed filter and filled canister with antifreeze
Connected short water hose to antifreeze inlet (other end in bottle)
Turned the 90 degree valve with handle in line with inlet instead of fresh tank
Turned on the pump and opened cold water at kitchen sink

Also tried it with faucet closed
Also tried it with valve handle turned the other way
Disconnected inlet and outlet and filter screen from pump to check for blockage
Checked for kinks in the inlet line
Tried raising the level of the antifreeze bottle
Had a glass of wine

I couldn't find a hose the right size to connect directly to the pump but since there didn't seem to be much suction I thought I'd check with you guys before I went out and bought tubing to try that. Pump is a Shurflo 4008 RV Revolution by-pass pump.
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Old 11-24-2015, 06:23 PM   #2
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I have an WS8289 and I have a valve that I have to turn to get the pump to draw in the anti-freeze. It's right next to my pump. You may be able to trace the anti-freeze line in to see where it goes.
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Old 11-24-2015, 06:26 PM   #3
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is there another valve up stream of the antifreeze inlet that isolates the fresh water tank ?
you could just be sucking air
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Old 11-24-2015, 06:29 PM   #4
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Check the fuse for the pump? Closed the low point drains?
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Old 11-24-2015, 06:35 PM   #5
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It did not check the fuse since it is making some noise so seems to be getting power.

But I DID NOT close the low point drains.
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Old 11-24-2015, 06:36 PM   #6
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I looked for another valve and didn't find one. The 90 degree valve is at a juncture that either goes to the FW tank or the antifreeze inlet so I assumed it served both lines.
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Old 11-24-2015, 06:39 PM   #7
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On my 371 REBH the valve must be turned 90* to the line to use the winterization (suction).
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Old 11-24-2015, 06:40 PM   #8
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Teri, if you have a valve for your FW, see if it's a 3 way valve. The other side of it could be your anti-freeze line.
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Old 11-24-2015, 06:41 PM   #9
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I had to close the valves, creates back pressure. Then seal around the bottle with my hand and force prime the pump. Once it starts to draw it will suck the pink in quickly.
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Old 11-24-2015, 06:54 PM   #10
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Try closing all faucets, and low point drains. Then turn on pump. it should draw and eventually build enough pressure to stop the pump. Then open faucets and low point drains one at a time until pink stuff comes out.
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