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

crosstrnr
crosstrnr Member Posts: 24
in Modifications & Upgrades
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!


2019 320s Boondock Edge
TV is 2007 Kia Sorento EX with 3.8L engine

Comments

  • ScottG
    ScottG Administrator Posts: 5,674
    @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.
    2015 T@B Max S (320)
    2015 Nissan Frontier SV V6 4x4
  • crosstrnr
    crosstrnr Member Posts: 24
    edited January 2023
    @ScottG
    What did you use to reseal the hole when done? Concerned since we do use the shower.
    2019 320s Boondock Edge
    TV is 2007 Kia Sorento EX with 3.8L engine
  • Grumpy_G
    Grumpy_G Member Posts: 748
    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
    ScottG Administrator Posts: 5,674
    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
    2015 T@B Max S (320)
    2015 Nissan Frontier SV V6 4x4
  • crosstrnr
    crosstrnr Member Posts: 24
    @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.
    2019 320s Boondock Edge
    TV is 2007 Kia Sorento EX with 3.8L engine

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