Originally Posted by Wolverine 1945
I am very surprised that waste could make it thru that P trap ???
I did go extreme on the trap I should of used 45's instead of 90's but it works good and does not clog. I always let my black tank fill between 3/4 to full before I dump then always flush it good then I let my grey waters fill up a couple of days before I dump and that washes out the trap and pipe.
We used to get some sewer flies but since I put in the trap no more flies and no more sewer smell.