plumbing advice needed

[parkinsn]

Originally Posted by Davidbugera

Having it threw the front of the over flow is not a good idea in my opinion just cause if u use lock line the links don't seal together proply and If u have a power failure water will drain to the level of the bulk head I found this out by dumping 7ish gallons of water on my upstairs floor lol. I guess if u use a really good check valve it would bee ok but the ones for lock line suck

There is nothing wrong with doing as mentioned and pictured above. I doubt the lock line seal will fail any time soon for one. Also there is an easy solution if you are worried about that. Drill a couple small holes in the PVC return line in the overflow that will stop the syphon. I have pretty well the same over flow as Doug has pictured above, I drilled the under side of the 90 and have no problems, and no need to worry about the lock line failing.