Forum Discussion

Sundown858's avatar
Sundown858
Explorer
Feb 10, 2023

Anyone know what this cold water tube is for?

These two tubes are coming from under the bathroom sink cabinet. One side of these tubes go to the faucet and rest of the trailer. The other side (pictured here) go through the floor to the underside of the travel trailer. When I connect to city water , the blue tube gushes and I have no water in the faucets. Is that blue tube supposed to be capped like the red one so pressures goes throughout trailer? If so, any idea how to cap it. It's kind of tucked way back there.

Link to picture of the tubes:
https://ibb.co/pdpphGq
  • Bobbo's avatar
    Bobbo
    Explorer II
    Feb 10, 2023
    I agree. They are low point drains. The red one is capped, as they both should be. The blue one is broken off. It needs to be replaced, and capped.

  • FrankoToo's avatar
    FrankoToo
    Explorer II
    Feb 10, 2023
    BB_TX wrote:
    Can’t see the end of the blue one very clearly, but guess is that it broke off. If you can access that pipe from under the sink you might replace the blue one with a longer one and either cap it or put a shutoff valve on it. And add a valve to the red one while you are at it so you can easily use the low point drains.


    ^^^^^ This ^^^^^
  • wanderingbob's avatar
    wanderingbob
    Explorer II
    Feb 10, 2023
    On my trailer those would be the low point drains . In the bottom of the sink cabinet on mine are two push/pull valves that will turn them open and closed !
  • BB_TX's avatar
    BB_TX
    Nomad
    Feb 10, 2023
    Can’t see the end of the blue one very clearly, but guess is that it broke off. If you can access that pipe from under the sink you might replace the blue one with a longer one and either cap it or put a shutoff valve on it. And add a valve to the red one while you are at it so you can easily use the low point drains.
  • enblethen's avatar
    enblethen
    Nomad
    Feb 10, 2023
    OPs link
    Red is hot and blue is cold
    looks to be low point drain that should be capped or a valve installed.
    It should have water flow while using holding tank and pump. Put some water in freshwater tank and turn on pump to verify!

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