280g Inwall

Parker · #1 10-21-2010, 10:02 PM

I run no piping on my main drain, just the bulk head on the bottom and my emergency is about even with the top of the overflow. The downside is my entire overflow drains when I shut the return down, but the sump is big enough to handle it. I would say my overflow probably holds 35/40 gallons.

lastlight · #2 10-21-2010, 10:33 PM

In my experience with the herbie setup I can't ever tune the gate valve finely enough to EXACTLY match the pumps output. The output also does change I suppose very slowly as it gets dirty. Either way what I have done is get it as close as possible so that the very slow creep is up and the emergency drain always has a very small amount just seeping down it. Bubble free, silent and like you said I have both my main pipe and my emergency very high. The overflow skims but drops about 1/2" into the box.

Lance · #3 10-21-2010, 11:54 PM

Quote:

Originally Posted by lastlight

In my experience with the herbie setup I can't ever tune the gate valve finely enough to EXACTLY match the pumps output. The output also does change I suppose very slowly as it gets dirty. Either way what I have done is get it as close as possible so that the very slow creep is up and the emergency drain always has a very small amount just seeping down it. Bubble free, silent and like you said I have both my main pipe and my emergency very high. The overflow skims but drops about 1/2" into the box.

Exactly.

StirCrazy · #4 10-22-2010, 07:40 PM

Quote:

Originally Posted by lastlight

Either way what I have done is get it as close as possible so that the very slow creep is up and the emergency drain always has a very small amount just seeping down it. Bubble free, silent and like you said I have both my main pipe and my emergency very high. The overflow skims but drops about 1/2" into the box.

um thats how it suposed to be set up. so a small amount is flowing through the second tube.

Steve

Delphinus · #5 10-22-2010, 07:56 PM

I have a small amount going into the upper tube, although it's not steady. Because of the variable flow coming into the overflow (because of the waves going) the water level tends vary by about 1/4" so it comes up about 1/8" above the drain pipe then 1/8" below.

The issue was that, well, actually it's not really an issue, it's not THAT loud, but because I used a strainer on each standpipe, and the Eurobracing overlapping part of the standpipes, I can't get the top of the standpipe higher than 4" down from the top. It still works it's just that there's enough flow you can hear the waterfall when you're in the tank room. Outside the tankroom there is no noise so it's not like it's a problem.

But I found something that will allow me to raise the standpipe while keeping a strainer on it. Pictures tonight if I get the standpipe reworked. Would have done it last night but I decided to watch some TV instead.

lastlight · #6 10-22-2010, 09:18 PM

Quote:

Originally Posted by StirCrazy

um thats how it suposed to be set up.

Somehow I never read exactly how it's supposed to work that was the only way I figured it could. Just brain-dumping here in the hopes of helping out.

Delphinus · #7 10-22-2010, 09:24 PM

It IS helpful, thanks.

FWIW I didn't realize you were *supposed* to have a trickle in the upper standpipe, rather I figured it was harmless to have it.

Chin_Lee · #8 10-22-2010, 09:56 PM

nice skimmer......

Delphinus · #9 10-23-2010, 02:55 AM

Ok, so, you know how sometimes Home Depot will surprise you by what they don't have? Sometimes, although less frequently .. they'll surprise you with what they do have.

I found this by serendipity last night:

It's meant as a vent cover for 2" PVC, sits inside a coupler piece.

So, a quick bout with the chop saw and the top of the standpipe now looks like this:

So I cut a new piece of pipe (only had about 12" left of 2" PVC) and extended the standpipe. Looks like I could have gone 1/2" - 3/4" longer still, but nevertheless it's still a huge improvement in noise:
http://www.youtube.com/watch?v=wed0uKr0AY8