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If you wish to undertake plumbing work alone, opt for plastic, or more precisely PER (high density crosslinked polyethylene). An installation in PER does not require any welding, is insensitive to rust and is installed by screwing. You can buy pipes already sheathed, so you just have to connect them. Be careful not to over-tighten the collars as this type of plumbing tends to expand.

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