Sump pump size...

[George]

Originally Posted by hdrob

The tank that I'm hopefully picking up this weekend has 2 corner overflows with one hole in each overflow (hole is drilled right in the centre, no room for another hole). Just outside of each over flow is is another hole for return. So, I should be able to setup one overflow as a semi-herbie with the second overflow as an emergency drain? Or should I set it up with stockman type of drains?

-Rob.

With 2 holes, you can do a full herbie. Not sure what you meant by semi-herbie. You will use one hole as the main drain and another one as the emergency.

[hdrob]

I was asking if mark's setup was possible or if anyone had it setup like that.

One hole per overflow with 2 corner overflows.

Thanks Mark!

[mark]

Only issue I could see with running primary in one and emergency drain in the other overflow is water becoming stagnant in emergency's chamber.

Was going to raise the lip height of the overflow with emergency but never did. What I ended up doing was drill a hole in the side of the emergency drain standpipe so I have a small but continuous movement of water. My sump can easily handle the full volume of the chamber in a power outage but I still drilled it up near the top of the standpipe and have a 1/4"OD tubing running to the bottom. Since hole is near top, that's my siphon break.

I'm also running a 20g fuge separate from my sump and just tee's the primary drain. About 200gph to the fuge rest to the sump. Here's my post on converting from dual Dursos to the Herbie.

[hdrob]

I was planning on raising the emergency overflow lip.

Is there a benefit to letting a small amount of water flow through emergency overflow?

[mark]

think it's a either or type thing. Raise the lip or if both OFs same height, move the water a bit. For the emergency drain line itself, can't see advantage of running water through it, though see some conventional Herbies always running a little moist.

btw since you only have a single hole in each, seems a Bean is out.

[sphelps]

Why not use all drilled holes for drains so you can setup a dual herbie, then just run your return behind and over your tank.

And the dart isn't a bad size for the tank, a little big but nothing it couldn't handle. Personally I would go with a good quality internal pump for noise and reliability but that's just my personal preference.

[mike31154]

The way he described his overflows (post #8), the extra, or return holes are drilled outside of them. He'd have modify or move the overflows to include these outside holes (or plug them?) to do the Herbie using all drilled holes.