Thor Forums

[Pete'sMH]

Originally Posted by GeminiTK

Thanks. Good info. Looking at the schematic of the drainage system, I see an “Anti-siphon vent”. Now, it looks like I have to take a panel out to see it. How will I know if it’s closed?

If it’s a studer-vent it’s just screws off by hand. You should be able to suck air into it but not blow out through it. The “flapper” inside might be stuck from long periods of storage. Getting it freed up might be all you need to do but they also are cheap at big box hardware stores. It’ll be high up under the sink almost up to the countertop. I hope it’s something that simple. Good luck.