Drain question

[WhatCouldGoWrong71]

My new tank (96x36x25) has 4 drains that are 1.5". I will be doing 2 that will be full siphon (draining from the bulkhead), 1 that will be secondary and the stand pipe will set the water height and the oh poop drain that should be just below the euro brace (I assume). Should I plan on running a gate valve on each of the full siphons? With nothing on the secondary. Thoughts?

 

[PapaFishRocks]

I’ve always run valves on them all. Probably overkill, but valves are cheap.

 

[WhatCouldGoWrong71]

Can you send me your supplier? I’m seeing them at $100 each, lol.

 

[PapaFishRocks]

Can you send me your supplier? I’m seeing them at $100 each, lol.

Dang!!! $100 each!!!! That’s $$$$

Lowe’s and Home Depot have them for less than $20

Amazon has a bunch of options too
4 pack for $37
https://a.co/d/hYa9N98

 

[Solo McReefer]

Lowe’s and Home Depot have them for less than $20

He's probably looking at Spears or Hayward valves

 

[WhatCouldGoWrong71]

HD and Lowe's do not have gate valves for $20.

 

[WhatCouldGoWrong71]

Those are not gate valves, those are inexpensive schedule 40 ball valves that I would personally not use on a drain set up. Actually, I have had bad luck with the schedule 40 low dollar ball valves freezing up. I have actually also had a few break.

 

[PapaFishRocks]

My bad. I missed the gate valve part. Monday morning and no caffeine.

 

[twentyleagues]

You only need gate valves on the siphons. You dont want the secondary to be a siphon.

 

[Solo McReefer]

To answer the question

I would use a gate valve on each of the drains I normally expect water to drain from

E drains no valve, obviously

 

[WhatCouldGoWrong71]

My bad. I missed the gate valve part. Monday morning and no caffeine.

That’s my life everyday!!

 

[theMeat]

How many gallons per hour are you planning on running to display? How big is display?

 

[EeyoreIsMySpiritAnimal]

My new tank (96x36x25) has 4 drains that are 1.5". I will be doing 2 that will be full siphon (draining from the bulkhead), 1 that will be secondary and the stand pipe will set the water height and the oh poop drain that should be just below the euro brace (I assume). Should I plan on running a gate valve on each of the full siphons? With nothing on the secondary. Thoughts?

I'm not sure you want 2 full siphon drains in the same overflow box...

 

[WhatCouldGoWrong71]

How many gallons per hour are you planning on running to display? How big is display?

@EeyoreIsMySpiritAnimal

Tank is built - it has 4 - 1.5" drains. If you asked me 6 months ago, I would have said 3-5 times display turn over. The display is 375G empty. Both my tanks (that will consolidate into this one) were both using rollers. In the last 60 days, by accident I stopped using rollers and my tanks really responded well. So, as it sits right now, my plan is to have 1 drain run through a roller and the other 3 (includes the oh poop) to simply run into the sump say hi to the skimmer and then back up in the display. If I am putting a gate valve on both full siphons, then I could slow them down. @EeyoreIsMySpiritAnimal would you recommend 2 secondary?

So my options are:
1) 2 full siphons each with a gate valve, 1 secondary and 1 oh poop
2) 1 full siphon with a gate valve, 2 secondary and 1 oh poop
3) ?

My tank is a peninsula and when I was deciding on a peninsula I talked to 2 people who both have very very similar sized peninsula. Both of which have 4 drain set ups with full siphons. But I forgot to look at their gate valve config.

What's the formular to figure out the math on gph down a full siphon 1.5"


Thanks for offering some insight, super helpful.

 

[EeyoreIsMySpiritAnimal]

If I am putting a gate valve on both full siphons, then I could slow them down. @EeyoreIsMySpiritAnimal would you recommend 2 secondary?

Not really... you basically have 2 secondaries already. If both main drains become completely blocked, in theory the secondary and emerg drain should handle the flow.

 

[WhatCouldGoWrong71]

Not really... you basically have 2 secondaries already. If both main drains become completely blocked, in theory the secondary and emerg drain should handle the flow.

AHHHH - So, I could have 2 full and 2 identical secondary that also act as a emergency drain. I could lower the emergency drain to the height of the secondary. What are your thoughts on the 2 drains that would simply be bulkheads in the overflow box. Each on a gate? You questioned having 2 full siphons.

 

[EeyoreIsMySpiritAnimal]

So, I could have 2 full and 2 identical secondary that also act as a emergency drain. I could lower the emergency drain to the height of the secondary.

I would not recommend this.

 

[EeyoreIsMySpiritAnimal]

Personally, I'd just plug one bulkhead and use a more traditional design.

 

[theMeat]

Use one full siphon with valve.
Use two as secondary with no valves.
Use one as emergency.

The height of the secondaries should both be the same, and they determine the water level height in the overflow

 

[Solo McReefer]

CMIIW, The reason for the gate valves is to is to prevent air from being drawn into the flow

To quiet the draining, from gurgles, burps, and splashing sounds

If you have running water through the "secondary" without a valve, it will pull air, correct. Making noise

You want the emergency to make noise

I too would want to utilize all the holes

In the tank. Just the way I was made