Herbie Question?

[Kabong]

Is it the gate valve on this setup that makes all the difference?
Looking at the design of the top of it in theory couldn't you cut the top off your durso and accomplish the same thing for the top?

I have a durso that comes out the back.



Would cutting off the top to let air have unrestricted flow, along with replacing my ball valve with a gate valve give me the Herbie effect?

[mark]

With a Herbie the valve sits just above the sump, stricting flow into the standpipe causing the water to back up so that's all that's flowing (no air).

[Todd]

Would cutting off the top to let air have unrestricted flow, along with replacing my ball valve with a gate valve give me the Herbie effect?

Doing so with only one drain would practically guarantee a flood. Why is it that you have a ball valve on there now? Restricting return flow should only be done with a back up flow.

[Kabong]

So if there is no air intake down the drain is the GPH lower then a regular setup?

Why is it that you have a ball valve on there now?

I Have a ball valve on my current setup to control flow to the refrigium

[mark]

As Todd said, you need two standpipes for a Herbie (primary and backup) as asking for flood without.

It's not that bulkheads flow less, just flow is balanced to return pump. Skimmin has Herbies, 2-1.5" drains, and flows ~2000gph so not like bulkheads running less (but must be closed to max'd for gravity).

[Kabong]

I got it.
So Technically it would probably work, But I'd just be begging for a flood without a back up pipe.

It's not that bulkheads flow less, just flow is balanced to return pump. Skimmin has Herbies, 2-1.5" drains, and flows ~2000gph so not like bulkheads running less (but must be closed to max'd for gravity).

According to the RC drain size calc you need a minimum 1.85" for 2000GPH Giving a difference of 1.15" So it's got a fair bit of spare.

Any one else running a Herbie setup could you give your drain size + your Aprox flow.