Do you slacken off push fit connector then push in copper or plastic pipe then tighten collar up and when undoing MUST you UNDO collars before pulling out?
Do people deburr the copper pipe being inserted?
On that style of connector, it must be loose when inserting the pipe, then tightened afterwards.
To remove, loosen the collar, push the end plastic piece in towards the fitting, hold it in and pull the pipe out.
For copper, cut the pipe with one of these: https://www.toolstation.com/rothenberger-pipeslice-tube-cutter/p50182 so there is no burr.
Scratched or hacked copper will damage the seal in the fitting and it leak forever.
That is never used, it will scratch the surface.sand paper
No bother, if they say use push fits then crack on, always best to read the MI.
My concerns with push fits are always leaking seals later on in an electrical appliance, that's why I suggested compression is better suited IMO, not that you couldn't use push fit
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