tank overflow prevention?

[superduperwesman]

Originally Posted by asmodeus

Craig its really easy to sort out here keep your plumbing the same way open your ball valve full open.
what you need to do is drill a small hole in your return pipe just above the water line in your tank. This is going to allow you to back siphon the water once it reaches the water line so make the hole just below the water line then the pump goes off the water will drain only to the pipe with the hole. SUPER EASY

This doesn't address his issue... he's trying to use the ball valve to reduce noise... Basically you want a Herbie so your gonna need 2 drains