Siphon Break help!!!

[firereef]

I have 4 locline returns coming out of my overflow through the front and side of the overflow box. They are about 4-6 inches down form the top of the tank. I also have 2- durso drains in the same overflow. How do I do a siphon break on this setup? if the power fails will my tank drain untin it reaches 4-6" down where the 4 locline returns are???what do I do???
2 - 1.5 " lines come up form the bottom of the overflow and both tee into 2-3/4" return lines and go out front and side of overflow box.
whats the best option?

 

[firereef]

anyone have any idea?

 

[squidd]

I'm trying to get a "mental" picture here...
You say you have two "durso" standpipes AND two return lines...that ""T" off into four lockline outlets, but the outlets are 6" below waterline...?
Sounds "crowded" in your one overflow box...unless it's really large...
The "durso"s will stop siphoning when water gets below "inlet"...
In order to get a "siphon break" you would have to "route" your two 1.5" return lines..."up" higher than the water level (where you could drill a S.B. hole) And then loop them back down to hook up to the loc line outlets...
Otherwise the water will drain to the level of the loc line outlets...

 

[jlem]

Give people more than 11 minutes to answer
I really don't know any way besides trying to run your pipe higher up the overflow so it won't drain as much

 

[firereef]

what about drilling a hole in the top of the tee's and running tubing up higher?
check valve?
raise the locline up near surface inside tank?

 

[squidd]

Originally posted by firereef
what about drilling a hole in the top of the tee's and running tubing up higher?
Won't work...water will still flow through loc line and drain...you need to need to get an "air break" in a loop to stop water flow...
check valve?
Not reliable, tend to get cloged/stuck/gummed up
raise the locline up near surface inside tank?
That would drain "less" water, but at that point you could just loop them higher than the water level,drill the S.B/ hole and then down to outlets...

 

[firereef]

hi...
quote:
"That would drain "less" water, but at that point you could just loop them higher than the water level,drill the S.B/ hole and then down to outlets."..
I dont really follow??
what do you recommend is best to deal with this?
locline only runs on the outside of the oveflow.

 

[squidd]

Your two 1.5" return lines come up from the bottom of the tank...they need to get up higher than the waterline and loop back down to the outlets...wherever you chose to place them...
In this "exposed" loop you drill a small hole which becomes your "siphon break"
Then you can set you outlets at the waterline below the waterline,"T" them off in different directions, whatever you want...
It's the "exposed loop" (higher than water level) that will keep the tank from draining...
If you just "raise the locline up near surface inside tank?"your tank will still drain to the lowest loc line "outlet" (which becomes an inlet in reverse siphon)...