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The user then pulls the level as necessary to pressure the pipe into forming a perfect bend around the shoe.
This turbulence in the water can cause air bubbles which, if allowed to collect, can cause air locks. Bending copper pipe accurately requires some measurement and angle work so please do not think you can just go and hire a copper pipe bender to get a perfect job first time, it takes some practice. Ratchet pipe bender - Ratchet pipe benders look much different to other pipe benders as they use a lever to 'push' the pipe into shape. Pipe springs can be used in pipes up to 22mm diameter but bending a 22mm pipe with a spring is a herculean task which none of us would attempt. If you are going to try this method, I would suggest Woods Metal, available from Reeves ( possibly other suppliers too?
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