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Old 06-07-2019, 03:54 PM   #1
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Help Please!

2016 Timberridge 26RLS. I cannot get the water pump to fill the hot water tank.


We winterized with pressurized air, so the "suck the anit-freeze" valve was not touched, and the bypass valve is pointing down: opposite of how I found it.


Fresh water tank is full. The hot water tank is getting pressurized with air as the water pump runs, but no water anywhere (cold water or in hot water tank).


What am I missing? It was so easy last year (did the same thing and it was my first de-winterizing).


Any ideas are appreciated.


Thank you!


//KMac
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Old 06-07-2019, 03:58 PM   #2
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If my city water fill, where I connect a hose to my rig, is not capped off, sometimes the water pump will pump air from that city water fill rather than water from the tank. Then, it takes a while for the pump to fill the water heater tank before water comes out the tap.
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Old 06-07-2019, 04:00 PM   #3
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Is a hot water valve open at a faucet? If air is getting pressurized, it needs to vent out somewhere.
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Old 06-07-2019, 04:03 PM   #4
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It takes awhile to fill the tank from the pump. usually I leave the pump running, go outside to water heater, open the pressure relief valve at top of tank, you should hear the air escaping, once you have water starting to come out the valve, shut the valve your should be good to go.
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Old 06-07-2019, 04:19 PM   #5
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Quote:
Originally Posted by Brad Wilf View Post
It takes awhile to fill the tank from the pump. usually I leave the pump running, go outside to water heater, open the pressure relief valve at top of tank, you should hear the air escaping, once you have water starting to come out the valve, shut the valve your should be good to go.
What Brad said.......it takes about 3-4 minutes to fill a 6 gallon tank with the pump. I pre-fill the system with hose connected to city water. Much faster. I leave the kitchen hot water open during this fill to purge the air.
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Old 06-07-2019, 04:28 PM   #6
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Update: I have left the pump running for 30+ minutes... no water.


No taps open. When I do open the tap, the pump gets louder, and air is pumping out.



It is almost like the pump lost its prime and cannot get re-primed with water from the fresh water tank.


Thanks!


//KMac
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Old 06-07-2019, 04:33 PM   #7
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That is what is supposed to happen. Just let it keep going until you see water coming out of a hot water tap.
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Old 06-07-2019, 04:38 PM   #8
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Make sure your low points are closed. You are getting air from somewhere. if the antifreeze IN is closed, it can only be the city water hose connection or a low point drain.
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Old 06-07-2019, 05:00 PM   #9
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I am not sure how low spots on the outbound side of a water pump will stop water from being sucked up on the inbound side, however I will double check.


Thanks!


//KMac
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Old 06-07-2019, 05:29 PM   #10
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Sounds like your pulling air from the suction side of pump, double/triple check valve for winterizing (sucking rv antifreeze) and double check any connections you can see on suction side of pump...double check pump housing for small crack...
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Old 06-07-2019, 05:34 PM   #11
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Hook the hose from city water back up to trailer. Turn valve to city water. Open hot water tap at sink. Leave open until water comes out. Approx. five minutes.
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Old 06-20-2019, 11:45 AM   #12
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SOLVED!

Since the pump was sucking air, there are very few places for that to happen. In my case it was a very small crack in the clear plastic "cup" of the in-bound strainer (see pic).


Nothing to do with anything on the outbound side of the water pump.


Thanks!


//KMac


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Old 06-20-2019, 11:56 AM   #13
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Yes , winterizing with air doesn't protect the 12 volt pump , or the strainer , even running the pump dry can leave enough water in the strainer, or pump head, to crack it .
Next year ,after blowing the lines from the city connection, remove the pump from the RV, blow back through the fresh pick up line to the tank, and store the pump away from freezing temps.

Do not ask why I say to do all this.
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Old 06-20-2019, 05:49 PM   #14
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Quote:
Originally Posted by kmac7800 View Post
Since the pump was sucking air, there are very few places for that to happen. In my case it was a very small crack in the clear plastic "cup" of the in-bound strainer (see pic).


Nothing to do with anything on the outbound side of the water pump.


Thanks!


//KMac


Attachment 250532
Thanks for posting cause.....we all learn this way.
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