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May I ask what a waterproof shoulder is? It's best to have pictures.

2020-03-20View Original

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I have never seen waterproofing of pipes passing through walls. Please give me some advice.
Reply #22020-03-20
This post was last edited by Shutong on 2020-3-20 09:44 Pipes passing through the roof must be equipped with waterproof shoulders and rainproof caps
Reply #32020-03-20
HG/T20549.4 P174

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