Wayne's 90 Gallon Build

[wmcinnes]

Originally Posted by reefwars

why three gate valves????

I'm doing a Herbie overflow so I need one on my main drain line to control the syphon, one on my return to control flow and complete isolation when i need it, and one on the tee'd-off line from the outlet of the return pump to the refugium.

Probably only really needed two but they are already ordered..