I'm investigating replacing my toilet's water supply line/the possibility of installing a bidet.

This is what my current supply line looks like enter image description here

From what I can tell, there's no easy way to replace this type of hose without replacing the water shut off line, but I'm a bit scared to attempt that as I have no idea how difficult it is, nor do I particularly want to do it if I don't need to.

Is there a way to replace this style supply line easily, or am I going to need to replace the line + the shutoff valve?

  • 3
    This looks like a common compression fitting line that should come right off of the valve. Have you tried to remove it and had difficulty?
    – JPhi1618
    Commented Feb 18, 2020 at 16:28
  • I agree a replacement can be found at any home store or plumbing specialty. Show them the photo, very common.+
    – Ed Beal
    Commented Feb 18, 2020 at 16:37
  • @JPhi1618 Not yet, I tried removing the supply line in a previous apartment I lived in and had to get the complexes maintenance crew involved to get it fixed, this one looked similar so I wanted to get as much information as possible before messing with it.
    – Eabryt
    Commented Feb 18, 2020 at 17:13
  • why are you replacing the water line?
    – jsotola
    Commented Feb 18, 2020 at 17:38
  • @jsotola I'd like to replace it with one in better shape + most likely will install a Bidet and I do not believe the current supply line will be flexible enough to install a T-valve.
    – Eabryt
    Commented Feb 18, 2020 at 18:18

1 Answer 1


As was mentioned, the gray hose is connected with a compression fitting at the bottom, and maybe a pre-crimped fitting at the top. In any case, they thread right off.

I'd go buy a stainless mesh-wrapped hose in the next length up from what you need and with the correct end fittings (standard for a toilet). These will have integrated seals, so just snug them up slightly.

Put a slight corkscrew twist in it to take up the slack. It'll look great.

Optionally replace the valve with a nice clean new one and shorten the supply pipe to get it closer to the wall. This will require a compression fitting, but they're not difficult if you start with a clean pipe. Be sure to use two wrenches, one on the valve body and one on the connection nut, so as not to strain the pipe.

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