Replacing Durso with Herbies questions

Jeepjeep_0 · Jan 14, 2020

All right so I’m about to plumb out my 180, the tank came factory dual overflows. Each overflow is drilled 1” with Durso stand pipe and drilled 3/4” with return. Gonna full siphon through the 1” holes and emergency drain the 3/4” holes. Then gonna run to 3/4” lines over the back of the tank as returns.

- How difficult is it to dial (gate valves) in the two drains? I’m starting to read it’s difficult with 2 herbies.

- Once they are both dialed in, is it a constant adjustment or will it just run well until something is changed?

Bigtrout · Jan 14, 2020

I just put a herbie on an eshopps pf-1200 with the dual drains...one herbie was easy to dial in with the gate valve. Id never have that fine of an adjustment with a ball valve. Mine has stayed tuned and starts back up and goes full siphon even after a power outage without adjustment. I dont think you have to do anything until something changes You may have to play with standpipe heights a bit to get dialed in.

I would switch up your plan however and use the 3/4 for drains and 1 inch for emergency. The drain will be full siphon...but the emergency may not go full siphon so you want it to be able to handle everything.

mfinn · Jan 14, 2020

My herbie drain needs to be tweaked maybe once every week or two, just a very tiny amount.
I would guess that doing 2 herbies would be challenging.
But I'm sure there are many doing it.