Sump plumbing design

[Heltyman]

Hello all,
Which of the following two options do you think is best?

1) Horizontal drain plumbing (90º elbows)

2) Diagonal drain plumbing (45º elbows)

Thank you!!
Greetings!

 

[skydirt]

45 will always be the least restrictive and better for flow. If using 90 and possible use a long radius 90. Either will work though

 

[Koh23]

Way back, there was extensive testing of flow rates and pressure trough various pipe diameteres, and specialy 45 vs 90 elbows...

Cant find that article, but i remember, there is virtualy no difference in flow, all is in margin of error.

So if u have place, go with 45, if not, you will not lose anything if u use 90 elbows....

 

[shakacuz]

90 looks cleaner. as in, you'll have more sump room.

 

[BAMatter]

90 looks cleaner. as in, you'll have more sump room.

Totally agree. 90’s look way better. I’m also under the impression that as long as horizontal runs are under 24” you’ll be fine in terms of getting full siphon from the Herbie style. However I do believe the emergency drain is far better off having a direct straight path down to the sump in case it’s needed

 

[Heltyman]

Totally agree. 90’s look way better. I’m also under the impression that as long as horizontal runs are under 24” you’ll be fine in terms of getting full siphon from the Herbie style. However I do believe the emergency drain is far better off having a direct straight path down to the sump in case it’s needed

That's what i'm afraid of.
The horizontal line would be longer than 26 inches...
Therefore the 45 elbows would be safer, right?

 

[BAMatter]

That's what i'm afraid of.
The horizontal line would be longer than 26 inches...
Therefore the 45 elbows would be safer, right?

Would imagine it depends on how much longer you’re talking about, how big the piping is, and how many GPH you plan on putting through it. I’m by no means an expert on plumbing however.

 

[BAMatter]

Would imagine it depends on how much longer you’re talking about, how big the piping is, and how many GPH you plan on putting through it. I’m by no means an expert on plumbing however.

You can also look into flexible tubing as well…

 

[TangerineSpeedo]

IMO, 45 for the E-drain and 90 for the siphon. When I was making my surge filter on my rear compartment I was having a hard time getting that siphon to work. I did a bit of research which led to a few Hydroponics farmers sites that use a bell system siphon system. Using 90's was there way to restrict the flow enough to eliminate air out of the system to start the siphon. I would imagine a 45 might be harder to get the system started because of high flow over a long distance, even if you did use a gate valve. You would have to adjust your flow again after the siphon started. ( close it down to start the siphon/ open back up to get your flow rate)
my 2 cents

 

[Heltyman]

IMO, 45 for the E-drain and 90 for the siphon. When I was making my surge filter on my rear compartment I was having a hard time getting that siphon to work. I did a bit of research which led to a few Hydroponics farmers sites that use a bell system siphon system. Using 90's was there way to restrict the flow enough to eliminate air out of the system to start the siphon. I would imagine a 45 might be harder to get the system started because of high flow over a long distance, even if you did use a gate valve. You would have to adjust your flow again after the siphon started. ( close it down to start the siphon/ open back up to get your flow rate)
my 2 cents

But why 45 for the E-drain then? If as you say that way is more "difficult" to start the siphon, it wouldnt be more risky?

 

[TangerineSpeedo]

Typically with the E-drain you never will start a siphon. Nor do you really want to. When you set up the flow, you want the water level to "just" flow over the top of the E-drain to achieve the quietist results. You would not be able to create a continuous siphon that way. Because of that you want a Non-siphoned flow to run as efficiently as possible (45's) and not create any resistance to may lead to a on and off again siphon flow (noise).
hope this helps