DIY Plumbing durso oveflow

[originalsd]

So i have a internal durso style overflow, and i need help with plumbing instructions(what pieces i need and the best way to do it? If anyone can help that would be awesome. Anything helps. Thanks

[drainbamage]

so what sort of drains do you want to do? The three system herbie, or just the durso with a backup? Or the gate valve with a backup system (honestly can't remember which names go with what anymore)?

and if you can get pics/dimensions, will be much easier to suggest the plumbing pieces you'll need.

[Techknowledgy]

Instructions