Loc-Line attaching to PVC

If i wanted to split my PVC return line into (2) loc-lines with nozzles, is this all I would need?

If I drilled a small hole for siphon break above the water line in the PVC, could these loc-line returns be submerged?

Needed:

Female 3/4" Threaded Adapter (PVC)
Male 3/4" Threaded Loc-Line Adapter
(2) 6" Segments Loc-Lines

This will be my first time having a return and using loc-lines. Any advice? I was probably going to get the rectangular nozzles also.

 

That's what a lot of people do , sounds like you have it figured out.

 

NEVER depend on drilled holes as a form of backflow prevention! They can and do fail every day. Keep your returns close to the surface so with a very small, easily calculated backsiphonage before the return is exposed to atmosphere and you have an air gap, the siphon breaks and you have the best form of backflow prevention known to man. Nothing to clean or maintain and nothing to fail ever.

In my case I have just what you describe in a 100G display with a 30G sump. The returns are 3/4" below the surface so no splashing or noise yet when the power goes off I only siphon 3.5 gallons to the sump before the returns are exposed and the siphin breaks. Since water cannot jump uphill it cannot fail or flood.

Its easy to calculate how much room you need to maintain in the sump, LxWxH/231 or in my case 60"x18"x.75"=810, 810/231= 3.5 gallons. Thats a 3/4" drop in the display.
My sump is 30G and it functions best at about 1/2 to 2/3 full so I always have close to 10 gallons of freeboard or spare capacity at all times so no worries about flooding or getting my feet wet. If I were to calculate the sump volume it shows it holds 1.66 gallons per vertical inch so that 3.5 gallons will raise the sump just ove r2" is all.

 

or maybe just a check valve?
Just kidding AZ, Have a good day man.

 

LOL, now that's funny! Every time I see someone say check valve I first think about AZ then immediately after I imagine a flooded living room.

 

There is a three way (branch 1 to 2) loc line. I got some for my setup but decided to use just one on each side.

You should do a water test on your setup first. I did and simulated a power fail. My sump handles all the dump until the siphon breaks.

 

So it sounds like to split my return into two loclines I need this piece list:

(2) 3/4" Loc-Line Modular Hose
(2) 3" Flare Nozzle for 3/"
(1) Y Fitting for 3/4" Loc-Line Modular Hose
(2) 3/4" NPT Connector for 3/4" (Used to connect to pvc threaded return line.... I think)

 

Yep,thats it.

Not sure if you have seen this site but it makes it easy to visualize the LocLine fittings since they are all pictured:
ModularHose.com - Loc-Line 3/4" ID System