how to get even drain from 2 pipes?

[juaninsac]

<a href=showthread.php?s=&postid=9877321#post9877321 target=_blank>Originally posted</a> by merseyman
... my 2nd IS a durso, and I'd say it carries at least 30%. How much depends on your manipulation of the valve on the other pipe obviously.

Ah. Do you get any noise from the air getting sucked in?

 

[merseyman]

nope. only problem I get now is an occasional "burp" from the higher tube every couple of hours. If I let the level in the overflow get too high, then I get constant burping, the same problem I had w/ 2 equal dursos. Never had a problem w/ an air sucking noise into the dursos, only an air burbing noise at their outlets.