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Old 04-15-2015, 10:26 AM   #11
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Covered in post 4. The big concern here is coaches without a gravity fill. They have to have vents that drain water fast enough to prevent tank pressure build up in an overfill situation. Had a custy with one such coach. 4x6 foot flat tank 6" thick under the floor. Had vents on each side that would leak on cornering. So, he put drain valves in them. Put the hose on the female threaded fill and turned it on, thinking it was the city water inlet. Turned the water tank into a 9000 lb jack on the living room floor...it went down to the axles and up from there.
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Old 04-15-2015, 01:33 PM   #12
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why don't you get a butterfly relief valve or if possible a close valve on the line between the pump and the water supply. The relief valve would not require and manual service. It would work like the pump valve should work.
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Old 04-15-2015, 01:39 PM   #13
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Replace the F/W pump! Youroo!!
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Old 04-15-2015, 01:58 PM   #14
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Quote:
Originally Posted by youroo View Post
Replace the F/W pump! Youroo!!
too easy.....were looking for a challenge here...
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Old 04-15-2015, 02:41 PM   #15
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Quote:
Originally Posted by j free View Post
why don't you get a butterfly relief valve or if possible a close valve on the line between the pump and the water supply. The relief valve would not require and manual service. It would work like the pump valve should work.
I did add a fancy check valve attached to the pump. It worked as you said but cost a huge pressure drop causing the pump to be useless. Best way is to use pump with shore water off. Use 1/4 of the tank and shut it off. Go back on shore pressure and never start the pump again until shore hose is off. Running together causes internal check valve to distort and leak.
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Old 04-15-2015, 02:55 PM   #16
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Youroo!!
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Old 04-17-2015, 10:22 AM   #17
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I had this problem last year and a blown LP regulator on the 1st night out on the road. The bypass valve is the weak link in the ShurFlo 4008 RV pump. ShurFlo sent me a free head assembly for the pump overnight and I changed it out the next morning. Their number is 1-800-854-3218. After careful inspection of the defective valve, it was determined that excessive high water pressure from the park can/ and will cause this valve to open up, letting water reverse flow into the water tank, causing it to overfill. A simple open/close shutoff valve installed between the pump and see through metal strainer will allow you to temporary shutoff the backflow of service water until you can get it repaired. I can take pictures if you would like!


Frank
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Old 04-25-2015, 05:35 PM   #18
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Thank you all for your suggestions. The situation has been resolved. Camping World in Lakewood NJ installed a new water pumper yesterday. it was covered under my extended warranty. They reimbursed me for the misdiagnosis from my previous visit and were a pleasure to deal with.
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Old 04-25-2015, 06:03 PM   #19
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Happy they took care of you! I have a spare water pump in my repair kit as backup.

Frank


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Old 04-26-2015, 01:40 AM   #20
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If you could take pictures that would be great, happened again on our last outing and was a real pain in the neck, Thanks!
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