Ball valves have it 😉
If you have a 40 & 50mm standard drainage pipe system, then these ball valves give a 100% seal 😮

🕔 Chapters:

02:14 Suction test before
05:48 Suction test after
10:02 Tips
12:52 Scissors lift

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Thanks a mil for taking the time ⏱️
Good luck 🍀

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