Planted Tank Enthusiast
Join Date: Nov 2006
Location: Calgary, Canada
The trick is when you're filling its at 60 to 80psi head loss across the solenoid, on drain you'll be lucky to see 10psi from what I can gather. Much larger orfices(or pressure) are required to achieve reasonable drain rates...
I'm trying to get a conventional diaphram type 3/4 drain solenoid to provide a reasonable rate and its been pretty disappointing thus far. 1/4 inch line/solenoid will be fine for the fill.
I'm going to try a booster pump and see how my rate goes then, the backup plan is a 3 way valve and a booster pump...