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Topic: Water Leak (Read 5295 times) previous topic - next topic

Re: Water Leak

Reply #20 –
Any possibility the leak is internal in the pump be itself?  Leaking from the pressure side back to the tank side?  That would cause the pump to cycle without any visible leak.

Re: Water Leak

Reply #21 –
Like Brett Wolfe said you have a leak on the pressurized side of the  system, could be the pump or connections at the pump, the pressure tank if you have one, or some other fitting, maybe even the hot water tank.  If you had an internal leak in the pump causing it to cycle you would not see any water.  Keep looking and you will find it.

Re: Water Leak

Reply #22 –
 I pressurized the system this morning and could see no leaks from the driver side utility bay with the panel removed. I rechecked the passenger side and discovered that both the cold and hot water fittings to the water heater have a slow leak. It appears the gasket in the female connections has deteriorated.

 So it's off to find a hardware store to get a socket large enough to remove the hot water tank drain and cone ? washers to replace those that have deteriorated.

Re: Water Leak

Reply #23 –
Glad you found the source.  Your rear bulkhead will appreciate your efforts.

Re: Water Leak

Reply #24 –
Use only original pex white rubber cone washers, ask me how I know.

Re: Water Leak

Reply #25 –
Leak caused by deteriorated washers on the pex lines feeding the back of the water heater.  More drip than running water.

Don't know about the white washers but the ones on the lines were black and the ones I replaced them with were black.

Found attached at Home Depot and had to shave them down as the we're too tall.

Hardest part was unscrewing and reattaching the supply lines one handed through the small round access hole in wall of the adjacent bay.

Re: Water Leak

Reply #26 –
Randy,

That will work a while but for your info the replacement washer info you need is PEX/ ZURN # QSETFC 1/2" washers.  A good plumbing store will most likely give you a couple as they usually have some in the bottom of some of there bins that have fell off fittings.  Yep that is the part number.

Mike

Re: Water Leak

Reply #27 –
Mike, thanks. Do you have a source?  Amazon sellers want $5.40 per washer...can that be true?

Re: Water Leak

Reply #28 –
The last time I bought some (about 6 months ago) they were ~$15 for 100.  For the AMZ price of $5.40 each they should at least give you a kiss...  A PEX plumbing supply company will have them in bulk so look around.

Mike

Re: Water Leak

Reply #29 –
I've always just picked up a few at a local RV store. They are cheap and look and feel just like the originals. Never had any problems.
jor

Re: Water Leak

Reply #30 –
Now that I understand our plumbing better I'm going to replace all the 18 year old rubber cone washers to avoid future leaks!

Re: Water Leak

Reply #31 –
I bought a few last year at a RV place in Knoxville, TN for .69 each.

Re: Water Leak

Reply #32 –
We were getting ready for a trip to New Mexico when I found water under the coach. Took the outside water closet apart to investigate. Only thing I could figure is that the outside faucet must have been open a bit. Dried everything out zipped it all up connected it to water; same problem. Only thing I can think of at this time is a leaking valve in the bathroom vanity. There are no water lines that run rearward of that compartment. No time to play now will have to look into it later. Not gonna take the coach took NM. Water my nemesis.

Roland

Re: Water Leak

Reply #33 –
This one is a b&_#h. I see the water dripping like Niagra Falls outside under the rear bulkhead. Dry beneath the vanity, shower, toilet. Dry on top of the tanks where the water lines run. Wet in the compartment where the grey and black water tanks are Wet behind the panel in the outside water closet, looks like it's coming from under the tanks. All water fittings are dry. It's fresh water that is leaking, only leaks when the lines are pressurized. Looks like the water is coming from under the grey and black tanks but I don't believe there are water lines under there. Yes it's fresh water that is leaking. Water pump compartment is dry. From what I can tell it's been leaking a while. Rear bulkhead is shot. Keep tearing things apart till I find the sucker.

Roland

Re: Water Leak

Reply #34 –
Roland I had the same problem. Couldn't find it anywhere! Turned out the "spun in" OEM fitting into the bottom of the fresh water tank that connected to the fresh water intake and low point tank drain. It wasn't a visible volume (or so it seemed) but spread across the tanks and water close and pump/water heater area is small amounts. We ultimately pulled the belly skin and realized we needed a basement structure rebuild. On the next trip, we found a stream of water coming out from between the skins. literally after weeks of searching we found two weeping, dripping polybutyl swivel connectors. We replaced those and pipe with PEX and flair fittings and so far, so good. Sorry for the long story. The fittings were attached to the turn off the OEM regulator after our mechanical reel and at a turn behind the water closet wall.

Re: Water Leak

Reply #35 –
Thanks for the info Alan.

I'm wondering if anyone has a schematic for the plumbing in a 1993 U280? Kinda working blind. I'll replumb the whole coach if I have to, but would like to see how FT ran the lines. I hadn't checked the ice maker yet did that this morning and yep it's dry. Draining the fresh water tank now before I go any further. The leak is somewhere in the pressurized lines whether they are pressurized by outside supply or by the water pump. Gonna be disconnecting lines and I don't need extra water coming out of the tank.

And yes my pump cycles but we have an RO system for drinking and cooking water with a seven gallon tank so it's difficult too determine if you have a leak with the pump on. In addition we always keep the pump off unless we are using water, compounds the issue.

Roland

Re: Water Leak

Reply #36 –
Just an FYI from experience with original post.  Leakin fittings on the back of the water heater are at the extreme inside of the water pump bay on our coach. Because of a slight side to side lean toward drivers side it appeared water pump bay was dry and water seemed to originate from the "utility" bay side leading me to incorrectly concentrate on water fill side.  Eventually I discovered that although water was showing up on drivers side utility bay it was cut ally originating in the passenger side water pump bay.  I now routinely reach up in the back of the water heater to check.

Re: Water Leak

Reply #37 –
I believe I have found the problem. I removed the expansion tank and pressurized the system. Left it pressurized for four hours and no leaks. I will leave the system pressurized overnight and see what happens. The bladder in the expansion tank is toast. I think water was leaking from the expansion tank. My tank is the original that was installed in 1993. Will be looking for a replacement but I will also look for an alternative place for it. May use one of the tanks I have four RO water. Not full-time any longer so a 3 1/2  gallon RO tank should be OK. I can use the second tank for a water supply expansion tank.

Roland

Re: Water Leak

Reply #38 –
Quote from: Roland Begin –
My tank is the original that was installed in 1993. Will be looking for a replacement but I will also look for an alternative place for it.
Roland,

I moved our tank from the wet bay to inside the coach under the bathroom sink.  Opens up the water pump/water heater bay area - much easier to work on leaks and other stuff.

Water Pump Accumulator Tank

Re: Water Leak

Reply #39 –
Nice setup Chuck. May follow your example. Makes for a cramped space where it is now that's for sure.

 Still running tests at the moment. left the water pump on all night no leak this AM. Shutoff the water pump and turned the outside water spigot on shouldn't make a difference but will leave it on for 24 hours. If I don't have any leaks I will consider the problem solved and button everything up.

Roland