Originally Posted by Carol H
Katie, I think Byron has the best suggestion, not sure you really need all that for venting...... may simple be a build up of gunk in the trap. Helped a friend replace the trap last year and it was jammed full of gunk.. nothing wrong it just needed a good clean out and the kink taken out of the drain hose attached to it.
Am I wrong in thinking if it were a drain trap problem that I'd still continue to have problems with it backing up (because the vent is distal to the trap)? Since allowing the air escape
, I haven't had any problem with the drain at all. I figured the backup was mainly because I've attached a hose to the RV connection and created a long, small-diameter, closed circuit and therefore significantly increased the peripheral resistance. It didn't do this when I was emptying it directly into a buck using a short length of hose.
(20 minutes after writing above paragraph): For good measure (and piece of mind), I removed the drain trap to inspect for build-up and it was completely clear. I think the problem was my original suspicion about the air needing venting. I'm sure I'll tweak my system a couple more times before finding the perfect solution, but for now it's working really well!
Thanks for all the feedback!