What is the purpose of the two drains on bottom of LE2?

[Dirt Duff]

My new-to-me 2017 LE2 has two drains in the undercarriage.  One drain is under the bathroom (see photo) and the other under the closet.  Water was dripping out of the one under the under the bathroom this morning.   I opened the "overflow valve" on the wall inside the bathroom and more water came out.  What is the purpose of the two drains? 

[topgun2]

49 minutes ago, Dirt Duff said:

My new-to-me 2017 LE2 has two drains in the undercarriage. 

Dirt - 

Actually, if you look around, you have more of these "drains" than you have found - so far.

These are "scupper" holes similar to those found in kayaks/boats.  They serve the purpose of removing any water/moisture that manages to collect between the inside and outside shells of your Oliver.  Generally this water/moisture is in the form of condensation - not actual dripping water.  

Since you have found dripping water this (almost certainly) is a sign that you have a leak in your plumbing system - somewhere.

Bill

[Steph and Dud B]

If opening the bathroom drain valve increased the flow of water, you probably have a leak in the bathroom drain system.

[jd1923]

1 hour ago, Steph and Dud B said:

If opening the bathroom drain valve increased the flow of water, you probably have a leak in the bathroom drain system.

True, but understand that valve only opens/closes the bathroom sink drain plumbing to the gray tank.

The only way opening that valve would release water is if when trailer is parked nose down, allowing gray water to float upstream. If that’s truly happening the leak is certainly in the front sink drain plumbing.

A simple test for that is to have the valve closed, run the sink faucet until there’s  some water on the shower floor. Then turn off the water pump (or disconnect City Water). If the leak keeps dripping after the water supply is depressurized AND the water on the shower floor recedes, then you have a drain plumbing leak. Hopefully (and likely) the leak is under the bathroom vanity, as the other drain plumbing is not so easy to access.

You'll likely have to remove the front panel of the bathroom vanity. If it’s screwed on, that means prior owner was in there. Ours was only mounted with a sealant and after doing some heater duct repair (check yours while in there!) I remounted ours with 4 screws and a rubber seal (I truly dislike sealants)!

When testing for water leaks, it’s imperative to the Oliver plumbing and tanks design, to make certain your Oliver is perfectly level! Make certain of this first! 🤣

 

[Dirt Duff]

Topgun2 - You were right on target!   The P-trap beneath the shower drain was dripping at the nut.  Luckily, the P-trap is located directly above the "scupper hole".   Although a  small puddle developed from the P-trap leak and it was quickly drained via the "scupper drain".   

The P-trap is in a very tight location that makes if difficult to hand-tighten ,or tighten with a the plumbers nut-tightening tool. I'll just keep working the angles in the tight location till I can find a way to tighten the nut on the P-trap.   Like the sinks in my house, there is likely no gasket on the P-trap elbow.  I wonder why a gasket is not required on the P-Trap joint with the nut as this is a common problem in house sinks??   Thank you again 🙂