Backwash valve leaking out waste

Debigold

Active member
Jul 1, 2018
29
San Juan Capistrano, CA
Hello Everyone,
Our hayward push pull backwash slide valve was slightly leaking at the elbow of the waste pipe. Not enough to come all the way to the end, but just enough to drip slightly at 1st elbow. We have replaced all o rings and still have the issue. Now what? I appreciate any help
Thanks