Filling hole with expanding foam

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Wanted to fill this big hole in one hit so used expanding foam then cut it off to wall edge then pushed into hole then filled on top with filler. I guess this is the best way.

How you clean foam canister so it doesn't get all blocked up?
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Does the householder know that you are asking questions on how to carry out work in their house???

Also, those pipes should of being cut back and not a dead leg. (Soldered might have being a better option.)

Andy
 
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Isn't there an issue with push fit connection being encapsulated and not being allowed to move meaning that they can't seal after a change in pressure and leak? I know they're not allowed to install them behind plasterboard on new builds for risk of them being encapsulated in plasterboard adhesive.
 
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After use If you immediately dribble lighter fuel in the nozzle it cleans out all the live foam .
 

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