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Old 08-08-2012, 07:08 PM   #11
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Is it me or do those sensors look weird?
Might be the angle of the photo...

Also where is the inlet screen filter for the water pump?
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Old 08-08-2012, 07:32 PM   #12
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Believe check valve belongs on dischare side. This allows pump to parallel shore water when connected supposed to stop backflow.

Low point valve leak- See this thread -current- in Georgetown section. Trekker having same problem with new pump and new check valve.
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Old 08-08-2012, 07:56 PM   #13
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Believe check valve belongs on dischare side. This allows pump to parallel shore water when connected supposed to stop backflow.

Low point valve leak- See this thread -current- in Georgetown section. Trekker having same problem with new pump and new check valve.

"SHURflo® Fresh Water Pumps


SHURflo's fresh water pumps have been the industry leader since 1988. These potable water pumps are self-priming and employ three independent pumping chambers to pump water smoothly and quietly. Built-in check valves prevent backflow into the tank. They can run dry without damage. Their patented design delivers smooth, consistent flow at all ranges of operation, while drawing low current. SHURflo® fresh water pumps provide flows from 1.0 GPM up to 3.5 GPM. They are built tough to provide reliable, smooth and quiet operation for many enjoyable years of use. Each SHURflo® fresh water pump is thermally protected for added safety and peace of mind. CE versions are available."

Here's why I say that.= The second purpose of the check valve is to prevent shore pressure from over pressurizing the pump. It can be higher and not everyone uses a pressure reducer. Just a thought. The water should not be getting back through your check valve and the pump built in check valve. Here Shurflo brags its self priming and they truly are, slow but it works. The pump is flooded suction it does not pull well when empty however.
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Old 08-08-2012, 08:28 PM   #14
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OK, wrong again (sigh)

I investigated this pump thing and it looks to me like the valve plate (part #2) has a 3 check valves; one for each pump chamber. That would be on the output side; what I initially thought was a check valve in the center, now looks like the pump pressure regulator valve (on the input side).
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Old 08-08-2012, 09:06 PM   #15
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Some say tomato, some tomato... Shurflo always refers to the check valve as N/S though now its "integral", no spend money on new dwgs? But worse than all that, its now two folks complaining of the exact same backflow. One more than the other....
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Old 08-09-2012, 07:44 PM   #16
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OK...... Here is the long of things. We have our issue solved of the water pumping into fresh water tank when on city water connection. My husband has discovered someone connected the lines wrong on the water pump. He removed the pump and turned it around and reconnected water lines and BAMMMMM. Solved. Thanks for all of your suggestions and help.
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Old 08-10-2012, 08:52 AM   #17
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OK...... Here is the long of things. We have our issue solved of the water pumping into fresh water tank when on city water connection. My husband has discovered someone connected the lines wrong on the water pump. He removed the pump and turned it around and reconnected water lines and BAMMMMM. Solved. Thanks for all of your suggestions and help.
NO way this would be found "troubleshooting."
It would have been found while replacing the pump though.

If the pump was reversed, how in the world did it work when not connected to city water? The pump would try to empty the lines into the fresh tank; then suck dry.

Whoever installed this pump reversed obviously never checked their work.
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Old 08-10-2012, 09:13 AM   #18
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Herk,maybe the (Pump) installer took his apprenticeship at F/R! Youroo!!
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Old 08-10-2012, 09:43 AM   #19
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Herk,maybe the (Pump) installer took his apprenticeship at F/R! Youroo!!
Well maybe, my pencils still have erasers also!

In hindsight remember they were on shore water all along while rebuilding this inherited trailer. When it came time to test the pump it was in backwards but he renewed in kind. Finally after everyone advise of what it should look like he corrected it.

I myself just studied his piping from orig photos. I sent him a PM last night ack the pump was in backwards from previous activity, and he was correct to turn it. Only clue? The discharge of the pump and its check valve lead to the clear soft tubing of the tank suction. Someone added pex to lenghten to it confusing the conections at the pump. Good job to the op for sticking with it!
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Old 08-10-2012, 09:50 AM   #20
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Yes, now that you mention it; the photo of the install clearly shows the unit is backwards.
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