When installing small-diameter PEX pipelines, the bendability of the pipeline should be utilized, and no or less pipeline connectors should be provided as much as possible. The minimum bending radius is 8De when the pipe is not equipped with connectors. When the PEX pipeline passes through the floor slab, roof concrete wall panel, and pool wall, the reserved holes, pre-embedded casing or pipe fittings shall be matched with the civil engineering according to the design requirements. The reserved aperture should be larger than the outer diameter of the pipe by 70mm, and the inner diameter of the embedded casing should not be larger than the outer diameter of the pipe by 50mm. When PEX pipes pass through the roof floor, strict anti-leakage measures should be taken. Wall-embedded pipelines should be reserved or drilled in accordance with civil engineering at certain positions. The distance between the groove wall and the outer wall of the pipe should not be less than 10mm, the depth of the groove should not be less than the distance between the outer wall of the pipeline and the rough wall of 5mm, and the notch should be neat and smooth.
