Need to fit an isolator to this stack of connections

[Salik]

I have this stack of connectors under my bathroom sink and I'd like to put an isolator there. I'm replacing the tap so may as well add in isolator.

Main issue is ... is it even possible now. this PVC fitting type is permanent. So I can't remove that fitting from the PVC.

One wonder why the previous owner did it like this rather than just pushing in a small section of copper pipe an then putting a standard isolator on there. Perhaps he though he was being clever.

I think he later caught on because in the other bath they did put a copper pipe out of the pvc fitting and I was able to put a standard isolator on it.

Any ideas.

 

[CountryFan]

Main issue is ... is it even possible now. this PVC fitting type is permanent. So I can't remove that fitting from the PVC.

No I don't think it's permanent, however not always reusable. Should be demountable.

Any ideas.

Undo the brass nut just above the plastic coupling and connect the isolation valve there.

 

[Salik]

No I don't think it's permanent, however not always reusable. Should be demountable.

Undo the brass nut just above the plastic coupling and connect the isolation valve there.

With polypipe it's permanent. The only way to demount is to cut.

The nut at the bottom? I think that a brass spigot which is pushed in to the connector. It would have been better had they use a polypipe isolator .. but we get what we get in housing.

Thanks for responding.

 

[CountryFan]

With polypipe it's permanent. The only way to demount is to cut.

Apologies, thought it was grey Hep.

The nut at the bottom? I think that a brass spigot which is pushed in to the connector.

The part I’ve marked is clearly threaded and should separate, keeping the brass nut in place and connect the isolation valve to that.

 

[Madrab]

The only way to demount is to cut.

No need to cut. the nut can be unscrewed and the fitting pulled apart. The grab ring is then twisted and snapped off. Used to be able to get packs of replacement grab ring replacements, they now do a component replacement kit for a pound odds too I think

Just replace it with a normal compression fitting though or just fit the pipe into the nut and olive part of the 1/2" compression adapter above once it's pulled apart.