plumbing help!

[ashr]

Hey all

I am about to buy all my parts for me animal bean over flow. I have 1" slip/slip bulk heads all read and two 3/4 slip/slip for my returns.

So far I am needing a 1" Gate Valve. slip/slip or threaded. Not sure what would be best.

Also I am needing a ball valve or a True double union ball.

Now this is where I am stuck.. Not sure what other major parts I will need.. Maybe check valves?

Any help would be great

Thanks