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How do I remove this Valve?

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  • Apr 10th, 2020 7:31 pm
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[OP]
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Feb 27, 2007
422 posts
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How do I remove this Valve?

So I have almost no experience with PEX so bear with me - replacing a toilet and I;'d like to swap out the supply stop so I can replace the escutcheon and install a less disgusting valve; any ideas how to remove this style of expansion fitting? I've tried puling on the fitting and there's not enough slack in order to cut it off and replace it with something else.

I've tried to find something on YouTube but I haven't seen anything like this there.
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19 replies
Deal Fanatic
Jun 24, 2006
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First thing. Make sure the water is off before you so anything. That just shuts off to the toilet, so it will also need to be shut off further down the line. Maybe at the main.

Then, take off the connection to the white line at the compression fitting. Then, try a wrench on the thin nut just below the valve and seeing it it turns. The valve should then spin off.
Deal Addict
Dec 17, 2007
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Alliston, ON
It could be a CPVC fitting which would be glued on, and need to be cut off.
A push-lok type vavke would have a ring on the bottom side that you'd pull up on while trying to pull the valve off.
I think you're going to have to cut the pipe if you want to remove the valve.
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Oct 15, 2007
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You’d have to cut it off, which you don’t appear to have room for.
It’s Rehau Pex-a expansion pex, similar to Uponor formerly known as Wirsbo. Not a very often used fastening system in North America for water distribution. More popularly used for heating applications
Last edited by Red_Army on Apr 10th, 2020 4:26 pm, edited 1 time in total.
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Deal Addict
Dec 9, 2003
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Strange fitting. It looks like the Dahl valve is attached to some kind of push fitting - like a SharkBite or TecTite or Mueller push connect except I dont think it is any of these.

My gut is you can hold the valve with vice grips and unscrew the hex fitting right under it. That way you can at least replace the valve.

edit while I was typing it looks like above post - Wirsbo - is correct. Still may be able to replace the valve?
Last edited by Cough on Apr 10th, 2020 4:12 pm, edited 1 time in total.
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Oct 15, 2007
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Cough wrote: Strange fitting. It looks like the Dahl valve is attached to some kind of push fitting - like a SharkBite or TecTite or Mueller push connect except I dont think it is any of these.

My gut is you can hold the valve with vice grips and unscrew the hex fitting right under it. That way you can at least replace the vale.
It’s not any of those . It’s Rehau .
Your gut is wrong
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[OP]
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Feb 27, 2007
422 posts
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Red_Army wrote: You’d have to cut it off, which you don’t appear to have room for.
It’s Rehau Pex-a, similar formerly known as Wirsbo. Not a very often used fastening system in North America for water distribution. More popularly used for heating applications
That's what I feared, was really hoping for a trick like this to be possible. I'm pulling the toilet this weekend, maybe if I'm lucky I'll find some slack under the floor.
[OP]
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Feb 27, 2007
422 posts
245 upvotes
Cough wrote: Strange fitting. It looks like the Dahl valve is attached to some kind of push fitting - like a SharkBite or TecTite or Mueller push connect except I dont think it is any of these.

My gut is you can hold the valve with vice grips and unscrew the hex fitting right under it. That way you can at least replace the valve.

edit while I was typing it looks like above post - Wirsbo - is correct. Still may be able to replace the valve?
Its definitely a dahl valve, if it's a push fitting underneath I have no idea how to remove it.
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Dec 9, 2003
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Red_Army wrote: It’s not any of those . It’s Rehau .
Your gut is wrong
Please clarify. My gut was about separation of the Dahl Valve from the Rehau fitting? Can this not be done?
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Cough wrote: Please clarify. My gut was about separation of the Dahl Valve from the Rehau fitting? Can this not be done?
No you cannot. It’s a manufactured piece.
There is a way to remove the fitting but it would be redundant as the pipe portion could not be salvaged in doing so
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Oct 15, 2007
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My only advice (if you don’t have slack) would be to carefully cut off the rusted escutcheon making sure to not cut into the plastic, and replace it with a split escutcheon, and lightly sand off the corrosion on the fitting
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[OP]
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Feb 27, 2007
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Red_Army wrote: No you cannot. It’s a manufactured piece.
There is a way to remove the fitting but it would be redundant as the pipe portion could not be salvaged in doing so
So I just stuck my head behind the toilet - by carefully pulling on the valve I was able to raise the valve 2" off the floor, or about 1.5" clear for the escutcheon. How far past the brass collar does the fitting extend?

I'm mostly just wondering if you think I have enough room to cut the pipe and fit a push fitting on it?
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von Monster wrote: So I just stuck my head behind the toilet - by carefully pulling on the valve I was able to raise the valve 2" off the floor, or about 1.5" clear for the escutcheon. How far past the brass collar does the fitting extend?

I'm mostly just wondering if you think I have enough room to cut the pipe and fit a push fitting on it?
The internal fitting ends at the collar. I’d be wary about installing a push fitting with out being able to properly hold the pipe. (If you feel you have enough room to hold it then great) Remember if there’s slack to pull up, that same slack can be pushed back when you try and install the push fitting.

I’d be more inclined to install a compression valve with nut, insert and ferrule.
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Jan 5, 2003
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Red_Army wrote: My only advice (if you don’t have slack) would be to carefully cut off the rusted escutcheon making sure to not cut into the plastic, and replace it with a split escutcheon, and lightly sand off the corrosion on the fitting
+1 since the valve is working and you're just thinking of cosmetic issues. Something like this is $1.40 at Home Depot: LINK

It's plastic so will never rust. It's split but with double sided tape where it splits so you just stick it back together when you put it over your pipe. Home Depot sells a few variations if you want brushed vs. chrome, etc.
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Jan 23, 2015
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I would give the escutcheon and valve a coating of silver rust paint and be done with it.
[OP]
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Feb 27, 2007
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Red_Army wrote: The internal fitting ends at the collar. I’d be wary about installing a push fitting with out being able to properly hold the pipe. (If you feel you have enough room to hold it then great) Remember if there’s slack to pull up, that same slack can be pushed back when you try and install the push fitting.

I’d be more inclined to install a compression valve with nut, insert and ferrule.
Thanks - I might just do that. Only looking at the push fitting as I have one on hand; I'd prefer not to have to order and pickup from Home Depot if I can avoid it. I was able to get the extra inch simply by reaching behind the toilet at giving it a slight tug, once the toilet's out I can take a better look.

Otherwise I might see if I can cleanup the valve and cutoff the escutcheon and replace it at a later date depending on how the valve looks.

Thanks for all your help!
Deal Expert
Feb 24, 2007
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I am with Bianco. If the esthetics are that much of a concern, get some type of a decorative cone and cover the damn valve.
[OP]
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Feb 27, 2007
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eldiablo wrote: I am with Bianco. If the esthetics are that much of a concern, get some type of a decorative cone and cover the damn valve.
I should have mentioned the valve passes; replacing it is both esthetics and functional.

But hey - continue to post low value comments, whatever floats your boat.
Deal Expert
Feb 24, 2007
15062 posts
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von Monster wrote: I should have mentioned the valve passes; replacing it is both esthetics and functional.

But hey - continue to post low value comments, whatever floats your boat.
now..you hurt my feelings..bro.

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