Plumbing remote sump: 90s ok?
 

Hey everyone,

I may need to have to plumb a remote sump down into my basement crawl space...

Will using 90s cause any problems with the overflow drains? Wanting to use herbies.

Also, where to place the gate valve for the herbie, just beneath the overflow?

Thanks!

http://i690.photobucket.com/albums/v...psixvdwugq.jpg

Forgot to add a couple things...

1) the sump goes in crawlspace.
2) would like to have a frag tank in-line in the stand.

Thanks

I have three 90s and two 45s on my overflow drains which is setup Herbie style. No problems here. My gate valve is also right below the overflow box, this way I'm able to tweak the flow every once and a while and watch the water level at the same time. Also, adjustments have an immediate effect.

90s are ok going down to the sump. 45s are far better for maintaining flow and reducing head loss for returning water to display.

BRS just did a video on 90s compared to 45s and the difference was minuscule.

https://youtu.be/h-PG4a0rU60

I was about to say the difference in 45 vs 90 is not much difference.

Saw the BRS video

All that BRS video did was prove that two 45s glued together acted the same as a 90 which isn't surprising. They didn't test if you have a gap between the 45s which I think would make a difference. The biggest difference though is pipe diameter.

Great info people!

So should I be looking at 3 Lines?
1 1.5" for herbie drain.
1 1.5" for emergency drain.
1 1" for return line?

That will be just fine. You could also do a 3/4 for the return.

I always have a good chuckle when hobbyists debate flow through different fittings. It's a plumber thing.

You would probably get a lot more flow out of your return pump if you run 1.25" or 1.5" depending which pump you use and it's rated flow. This is around 300 gallon system? You'll be using a big return pump, and the distance you describe using 1" pipe will strangle the flow. There is a point where using too big pipe diameter will cause extra head pressure on the pump too.

The size of the drain lines depends on the amount of flow and also the distance. With a Herbie drain, don't have any horizontal lines - make sure they all have a good slope downhill. Also, install the gate valve as close to the open drain end in the sump area as possible. Don't install it under the tank when you have a remote sump.