Low Point Drain gushing water

[edmonh]

Help! One of my low point drains is gushing out water as soon as I turn on water source outside at connection. Cap/valve is on drain, but still leaks when water is turned on. Any help or guidance would be appreciated.

2012 Georgetown 351DS

[kenandterry]

Are you saying the water is gushing out at the exact location of the cap, or just visibly dripping form this area?

Is this the first time you've pressurized the water lines this year?

Is it possible that you have a split line from winter freezing?

[edmonh]

Thanks! I live in California, 72 degrees today. We are camping this weekend and just finished hooking everything up. As soon as I turn the water on water comes gushing out of the grey line that has a screen attached at the end.

[Ford Idaho]

I'd bet you fresh water tank is full.

[fonzie]

I think that is your fresh water tank overflow. So the check valve in the water pump must not be sealing properly. Disconnect city water, turn water pump on, open cold faucet and let flow for one minute. Turn water pump off, turn on city water and hopefully it sealed. If not sealed, try again. Otherwise you might have to use on board water until you get it fixed......

[Mr. Dan]

Originally Posted by edmonh

Thanks! I live in California, 72 degrees today. We are camping this weekend and just finished hooking everything up. As soon as I turn the water on water comes gushing out of the grey line that has a screen attached at the end.

I don't think kenandterry was trying to suggest it was freezing today but maybe in the cold of winter.

However, I'm guessing it's a fresh water tank overflow... doesn't look like any low point drain I've seen.

[edmonh]

Thanks everyone! Wasn't trying to be sarcastic about my California comment, just that I live in an area where I don't have to worry about freezing.

[edmonh]

Thanks, Fonzie! Trying the steps you mentioned. Defiantly the fresh water overflow tank.

[undr60]

There are a lot of issues with the freshwater tank discharging most of the water when they are filling. Seems that the tank expands when filled at high pressure. They then "Burp" out all of the water. There are solutions on other posts. I just fill slowly when topping off the tank. Seems to work fine.


Sent from my iPhone using Forest River Forums

[frozen]

I've had two RVs with fresh water vent/overflow tubes that exited through the underbelly like edmonh's rather than venting next to the fill port. They were evidently placed too deeply into the fresh tank because each time I'd over-fill the tank, the vent tube would siphon out a bunch of the water. On one of the trailers, the siphon would remove about a fourth of the tank volume. I finally just stuck a cork in the tube and abandoned the vent.

[bubbles]

That is the holding tank vent/overflow and if the pump will not reset its backflow preventer and you have a winterization hose with the winterization selector valve and the winterization hose has a cap/plug installed you could switch over to the winterization mode and that will keep your holding tank from filling up till you can get a fix for the pump issue.

[pmsherman]

I've run into this problem a couple of times in my 2011 Georgetown 327DS when I filled the tank before heading out for dry camping and rocking motion of the coach body while driving started sloshing water out of the overflow tube. It forms a siphon which will drain water until it drops below the bottom of the tube inside the tank. It appears on my fresh tank that the overflow tube extends almost half way to the bottom of the tank.

The overflow tube is a 1" clear plastic tube so I've been considering putting a small hole in the top of the tube to prevent the vacuum necessary for a siphon. I can't see getting a high enough water flow in the overflow to fill the tube which, at its connection to the tank is at least 1/2" above the tank. The small hole will have a small diameter tube sealed into it whose other end points down towards the road to prevent dust infiltration into the tank. (Another project for a time when my hands are idle.)

A shutoff valve in the overflow could cause problems if you draw water from the tank and have no way for air to enter it. This will cause the tank to collapse which has a high probability of cracking the plastic tank, causing a major replacement job.

Phil

[bubbles]

Originally Posted by pmsherman

I've run into this problem a couple of times in my 2011 Georgetown 327DS when I filled the tank before heading out for dry camping and rocking motion of the coach body while driving started sloshing water out of the overflow tube. It forms a siphon which will drain water until it drops below the bottom of the tube inside the tank. It appears on my fresh tank that the overflow tube extends almost half way to the bottom of the tank.

The overflow tube is a 1" clear plastic tube so I've been considering putting a small hole in the top of the tube to prevent the vacuum necessary for a siphon. I can't see getting a high enough water flow in the overflow to fill the tube which, at its connection to the tank is at least 1/2" above the tank. The small hole will have a small diameter tube sealed into it whose other end points down towards the road to prevent dust infiltration into the tank. (Another project for a time when my hands are idle.)

A shutoff valve in the overflow could cause problems if you draw water from the tank and have no way for air to enter it. This will cause the tank to collapse which has a high probability of cracking the plastic tank, causing a major replacement job.

Phil

The OP's issue is that when shore water pressure is applied water flows out the holding tank vent/overflow. Check valve in pump not positioned correctly.

[vibe]

Originally Posted by frozen

I've had two RVs with fresh water vent/overflow tubes that exited through the underbelly like edmonh's rather than venting next to the fill port. They were evidently placed too deeply into the fresh tank because each time I'd over-fill the tank, the vent tube would siphon out a bunch of the water. On one of the trailers, the siphon would remove about a fourth of the tank volume. I finally just stuck a cork in the tube and abandoned the vent.

Seems to me if you closed off the vent the pump over time would collapse your water tank.

[rana]

Originally Posted by vibe

Seems to me if you closed off the vent the pump over time would collapse your water tank.

That's not the only problem you'll have. When in transit, it's perfectly fine to cap/valve/or otherwise close off the overflow vent. You just need to remember to open it back up before turning on your water pump.

[oldtool2]

I use a 1/2 inch hose attached to my water hose. This slips into the fill connection and doesn't allow the tank to build up pressure. When the water comes out of the fill hole I know my tank is full. Only costs a few bucks and well worth it.


Jim

[mark10361]

2 thoughts
1. Not to insult your intelligence but are you sure your water is not connected to the tank fill?
2. Turn off the water supply and run several gallons out of the holding tank with the pump