By allankn - 1/21/2021 2:07:29 PM
Couple of months ago I upgraded myself with 8mm silicone hose and the ECs couplings. Since I have had constant leaks in my vacuum. I haven't bothered too much and have run with the pump on. Last month I decided to examine where the leak was. First I checked the couplings attached directly on the pump. All good. Then attached the hose with couplings in each end. Leakage!
First I tried to replace the tape on the couplings, still leaking. Then I bought some specific thread sealant, still leaking. Then on top the hose I put specific hose clamps. Still leaking. Is the conclusion that the couplings themselves are leaking or am I missing something obvious here?
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By MarkMK - 5/6/2022 5:58:53 AM
Just another thought to add - When I used those couplings a while ago I had similar issues initially and was left feeling that it must be the couplings that were letting in air
You mentioned using a thread sealant (liquid type?) but, I found, using a gas-specific sealant tape around the threads (not the type designed for water pipes) was the best way to ensure a leak-free fit. It seemed to take away the issue, anyway
It only needs to wrap around a couple of time and can be a bit fiddly, but it seems like the best solution to sealing air couplings.
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