Water Pump Issue - Any ideas on accessing the PEX behind the toilet?

crosstrnr

I have a 2019 T@B 320s Boondock Edge with water pump issues. The system runs fine on city water. I have disconnected the water pump intake hose and put it into a bucket and the pump is sucking water through the pump. This leads me to believe I have air entering the system somewhere on the intake side of the pump.

I had to replace the sink last summer and know that the PEX moved around a lot during this repair.

Thanks to earlier posters I have a photo of the wall behind the toilet.

Any ideas on how best to find the air leak short of cutting a hole in the wall?

Thanks!

ScottG

@crosstrnr, this was the very first question I asked when I joined the forum in 2015. Unfortunately, there were no good answers. A few years later when I spring a small leak in a PEX fitting down in those nether-regions, cutting a hole in the wall was exactly what I had to do.

The project was less traumatic than I expected, and now I am happy to have a (sort of) easy way to get into that awkward space if needed.

crosstrnr

@ScottG
What did you use to reseal the hole when done? Concerned since we do use the shower.

Grumpy_G

Your test of the pump might be misleading unless the intake water level was below the floor like the fresh water tank. I was fighting a similar/same issue a year ago and the pump bench tested fine from a bucket. I ended up replacing the pump. PEX is pretty rugged so it's not very likely it sprung a leak.

ScottG

crosstrnr said:

@ScottG
What did you use to reseal the hole when done? Concerned since we do use the shower.

I used vinyl foam weatherstripping on the back of the cover. It appears to do the job just fine.

https://tab-rv.vanillacommunity.com/discussion/comment/116858/#Comment_116858

crosstrnr

@ScottG
I completely missed the link in your first post -- great explanation and photos. Looking forward to working on this once it warms up a bit.