[Shop-talk] Fwd: slow disposal drain

[Wayne]

On 4/14/2013 8:32 PM, Elton E. (Tony) Clark wrote:
> My wife, desperate to clear a disposal drain before company arrived,
> plugged both sides of the sink, ran the disposal side full of hot water and
> then unplugged that side and turned on the disposal . . the pumping action
> of the disposer and the weight of the full sink of water cleared the

My place was built around 2001, and has these "air admittance valves" 
(check valves, basically) rather that vent stacks on the drains.

Filled the disposer & sink full of water to test for leaks, and found 
the disposer has strong enough pumping action that water was going UP 
the pipe and spraying out all over the cabinet under the sink! Yuck. 
Supposed to only allow air IN, nothing out!

-w