So I just bought this house, and the plumbing is kinda... Funky, to say the least.
The issue I'm having is an extremely slow-draining bathroom sink. It's a very weird set-up: the sink tailpiece is connected to a vertical drain pipe via a PVC accordion-type piece and then runs straight downward under the house where it meets a common P-trap that it shares with the kitchen sink in the adjacent room. Weird.
The kitchen sink works fine, but the bathroom sink is ridiculously slow. I took apart the installation to inspect for clogs and cleaned it out with no improvement. I did find out thought that if I let the sink run until it's just about to overflow, it will create a vacuum and suck all the water down the drain forcefully. A general contractor said he thought it looked like a venting issue in that vertical run.
The common P-trap is properly vented and the kitchen sink works perfectly fine, so I'm fairly certain that the problem is localized to that one vertical run. AAV's are cool in my area, so I was hoping that I could just install one of those under the sink, but I'm worried because I know you're not really supposed to put them before any kind of trap. It could be possible to install another P-trap under the sink, but the space is very very small and I know that you're not supposed to double-trap a fixture. But would the difference in elevation kind of negate some of the problems with double-trapping?
Kinda stuck on what to do, I'd really like the AAV to just serve the purpose of venting that pipe before it hits the trap, but advice and suggestions would be greatly appreciated!
The issue I'm having is an extremely slow-draining bathroom sink. It's a very weird set-up: the sink tailpiece is connected to a vertical drain pipe via a PVC accordion-type piece and then runs straight downward under the house where it meets a common P-trap that it shares with the kitchen sink in the adjacent room. Weird.
The kitchen sink works fine, but the bathroom sink is ridiculously slow. I took apart the installation to inspect for clogs and cleaned it out with no improvement. I did find out thought that if I let the sink run until it's just about to overflow, it will create a vacuum and suck all the water down the drain forcefully. A general contractor said he thought it looked like a venting issue in that vertical run.
The common P-trap is properly vented and the kitchen sink works perfectly fine, so I'm fairly certain that the problem is localized to that one vertical run. AAV's are cool in my area, so I was hoping that I could just install one of those under the sink, but I'm worried because I know you're not really supposed to put them before any kind of trap. It could be possible to install another P-trap under the sink, but the space is very very small and I know that you're not supposed to double-trap a fixture. But would the difference in elevation kind of negate some of the problems with double-trapping?
Kinda stuck on what to do, I'd really like the AAV to just serve the purpose of venting that pipe before it hits the trap, but advice and suggestions would be greatly appreciated!
