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Old 03-23-2014, 09:02 PM   #1
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Water dripping from the bottom of my coach.

Lately I've notice lots of dripping coming from the holes on the bottom of my coach. Little wet spots are forming under them and dripping from my bay doors.

Is this normal or something I should look into further?

1997 Beaver Patriot, Cat 330 DP, Magnum Chassis, Allison MD3060 Tranny, 50 amp 120v AC, 12v DC.
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Old 03-23-2014, 09:06 PM   #2
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You must have a leak in there somewhere. Water can run a long ways from where it comes from. Ck under and around water heater, and ck all lines you can see.

Al, Michigan.

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Old 03-23-2014, 09:10 PM   #3
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Holes? Which holes? Water Bay Area? We need more details.
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Old 03-23-2014, 09:11 PM   #4
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Do you have some pictures?
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Old 03-23-2014, 09:13 PM   #5
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Put some water into your fresh water holding tank and turn on your pump. If you have a leak you will hear the pump cycle off and on. You probably have a leak somewhere but that will confirm it for sure.

Finding it should not be to bad of a problem. Fixing it may be another story. It will depend on where it is located. Let us know what you find and I'm sure somebody here will have had some experiences with the same or similar coach.

You've got to tell us make, model and year of your coach. Floor plan will help for more specific information regarding the locations of your water lines.
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Old 03-23-2014, 09:21 PM   #6
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Are you somewhere that there is snow melting going on?
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Old 03-23-2014, 09:42 PM   #7
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Ok, I updated my signature with all my info.

It appears to be dripping from the tank outlets. It's directly under the water bay area. The toilet is above that. It's very dry here, no rain or snow.
1997 Beaver Patriot, Cat 330 DP, Magnum Chassis, Allison MD3060 Tranny, 50 amp 120v AC, 12v DC.
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Old 03-23-2014, 09:56 PM   #8
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Have you been running the A/C? Do you have Aqua Hot?
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Old 03-23-2014, 09:58 PM   #9
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When it is dripping can also help track it down.For instance if it gets worse just after dumping and flushing the black tank, only when it is hooked up to mains, only when the pump is running, only if there is water in the tank etc.
Did you go through a freeze recently? Is this happening just after dewinterising?

Also make sure the low point drain and tank valves aren't on a little bit.
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Old 03-23-2014, 10:20 PM   #10
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The dripping seems to be fairly consistent. Just a slow drip with a little wet spot beneath at all times.

I'm not currently hooked up to water, I just fill up and dump every few days.

We've lived in it all winter so no dewinterizing.

I have not been running the A/C and I'm not sure what Aqua Hot is.
1997 Beaver Patriot, Cat 330 DP, Magnum Chassis, Allison MD3060 Tranny, 50 amp 120v AC, 12v DC.
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Old 03-23-2014, 10:44 PM   #11
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My Dad was a plumber his whole life. For hunting leaks, he would start with paper towel and start drying it up at the lowest point and follow it upward. Access soon becomes a problem. As mentioned, timing is important, when it leaks. Also beware of whether it is stored water, not under pressure or from water supply under pressure.

Trace what you can, common sense guesses after that and then access.
He said all a plumber needed to know was that water runs downhill and payday is Friday.
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Old 03-25-2014, 06:49 PM   #12
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Hi Rufuss,

Sorry to hear about your leak. Looks like you have some troubleshooting ahead. First step is to determine which tank/system is leaking. Try to eliminate some systems.

Probably not your black water system The toilet sits atop a roto-molded plastic tank and there is a dump-valve out ..... pretty simple system, not a lot of leak possibilities here .... and if it was a raw sewage leak, you'd know it.

Possibly your grey water system .... but not very likely .... gravity drains in, and a big dump valve out. There could be a cracked or loose fitting in the drain lines. If so, you would see the leak worsen when you are using a sink or shower, and stop when not running water. If you haven't run any water for a day and you still see the leak, you can eliminate this system as the culprit.

I don't have an AquaHot system (sounds like you don't either from your response), but it is a basically closed loop radiant floor heating system. There is some kind of fluid reservoir, a heater, a pump and lots of under-floor tubing. A drain valve, freeze plug or the heat exchanger failure would be obvious. If there were leaks in this system, you would also see the fluid reservoir drop.

It could be your hot water heater. Open up the exterior heater bay and check for evidence of water. Could be a drain valve, freeze plug or the heat exchanger. Should be obvious also.

I would put my money on your fresh water system. It's the most complex system with the most fittings. You have a hundred gallons of water stored in multiple tanks interfacing with city water inlet and the pump. The roto-molded tanks are not very likely to fail. Sometimes an entry/exit port cracks and sometimes someone puts a screw into one, but they are pretty reliable in general. I would suspect the lines and fittings on either the inlet or outlet (pressure) side of the pump going to all your fixtures.

TeJay had a great suggestion for testing all the lines on the outlet side of the pump. If the pump cycles when you have all the faucets turned off .... you have a smoking gun. If that is the case, start checking every set of water supply lines, including sinks, washers, showers.

If the pump doesn't cycle with all faucets turned off, you may still have a leak on the inlet side of the fresh water pump. Getting to this area may be difficult, start at your valve panel where you connect city water. You may have to dis-assemble things a bit to see the pump and the inlet side. You will likely have PEX plastic lines connecting multiple fresh water tanks to the pump. Many manufacturers used hand-tightened plastic compression fittings on these lines. Reach in and feel around for a leak.

Good luck on your search! MJ56 gave you the first two rules of plumbing, but also remember the third rule of plumbing....keep your fingers out of your mouth.

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Old 03-25-2014, 07:26 PM   #13
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Originally Posted by MJ56 View Post
He said all a plumber needed to know was that water runs downhill and payday is Friday.
And don't chew your fingernails after working on sewer lines.
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Old 03-25-2014, 07:50 PM   #14
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Rufuss, it may be dripping from your fresh water drain valve. You may want to open it up all the way and then shut it a few times. May just have a little burr on the valve seat. May want to do the same to your "low point" drain lines if they are in the same area. Once you do this it will be wet, so maybe put a small bowl or plate under where you think it was coming from and check it a little later to see if it quit.


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