建議

1. 用https://www.zoro.com/zoro-select-shielded-repair-coupling-43-psi-dx5001-66rc/i/G9679315/?utm_source=google&utm_medium=surfaces&utm_campaign=shopping%20feed&utm_content=free%20google%20shopping%20clicks&campaignid=19979164297&productid=G9679315&v=&gad_source=2&gclid=EAIaIQobChMIhuPMj8bygwMV9yCtBh2wEAfyEAQYBiABEgI9s_D_BwE&gclsrc=aw.ds

2. 安裝需要打磨光鑄鐵管外麵，否則會慢慢滲出來

https://www.youtube.com/watch?v=rNsLXhcSESU&ab_channel=CreativeProcessDIY

3. 安裝完邊上可以用Silicone

You don’t need glue, it’s called a no hub coupling. Just tighten the clamps on both sides. If it still leaks then silicone the ends. Hope this helps

3.

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