help me silence the overflow!

[smokinreefer]

Originally Posted by smokinreefer

so... i'd need to:
-remove cap from tee
-add 2 90elbows to make the "U"
is this a secondary drain?
does the top of the "U" need to below the tanks water line?
-add an air valve on top
to fine tune drain?
-add gate valve to main drain
is this necessary?

thanks

so, is that right?