return line hole location ??

tl_vang86 · 08/31/2007, 07:29 PM

where do i drill the hole in my return line so when power goes out the display water does not get siphon by the return line ?? i marked three spots on there: a,b,c can someone help by pointing me in the right direction as where i have to drill the hole at ?? its for a 10gallon tank with 10gall sump so i hope you guys dont mind me posting in the nano section.

NanoReefWanabe · 08/31/2007, 07:39 PM

Niether A,B or C...

it HAS to be INSIDE the tank about 1/4" to 1/2" BELOW the surface of the water....or however far down you want the water to drain...the siphon will break as soon as the water level goes below the drilled hole...

also drill the hole in the side of the return line or on the back side of it...not on the top...other wise water will spray out of the tank when it is being pumped..

as long as the hole is parallel to the floor or slightly down ward you wont have any problems...

Agu · 08/31/2007, 07:42 PM

"A ", but go just below the water line, less noise and splashing that way. Also, if the return outlet is just below the water level that will break siphon also. The return on my one tank with a sump is just below water level so it breaks siphon very quickly.

Welcome to the nano forum.

tl_vang86 · 08/31/2007, 07:46 PM

*sigh* wow so glad i did not drill any holes!! i was thinking C hahaha. does it matter on the hole size at all ?? right now i only have a 5/32" bit, will that work ? so stress right now i just picked up some blue "tub" zoas and i dont want them to die because i am messing with the tank tonight.

Agu · 08/31/2007, 07:47 PM

Quote:

it HAS to be INSIDE the tank about 1/4" to 1/2" BELOW the surface of the water....or however far down you want the water to drain...the siphon will break as soon as the water level goes below the drilled hole...

It can be above water level. The advantage above water level is that a snail won't be blocking the hole at just the wrong time

It's just easier, cleaner and safer to have the return close to the surface with the siphon break just below the surface.

NanoReefWanabe · 08/31/2007, 08:09 PM

ahh those bugger snails for got about them...

i dont have a siphon break on my return, the pipe barely enters the water on my tank...

5/32 is pretty big hole..it doesnt have to be that big but that will work..only disadvantage is there will be more water spraying out the larger hole then the end of the tube, then if the hole was smaller..1/8" is perfect...LOL 5/32 is only 1/32 bigger i guess you will be fine..please ignore my ramble i am too tired to erase it all...LOL

08/31/2007, 07:29 PM	#1
tl_vang86 Registered Member Join Date: Jan 2007 Location: WI Posts: 26	return line hole location ?? where do i drill the hole in my return line so when power goes out the display water does not get siphon by the return line ?? i marked three spots on there: a,b,c can someone help by pointing me in the right direction as where i have to drill the hole at ?? its for a 10gallon tank with 10gall sump so i hope you guys dont mind me posting in the nano section. __________________ 29gal in the works Current Tank Info: 55gallon

08/31/2007, 07:42 PM	#3
Agu Registered Member Join Date: Oct 1999 Location: Sarasota, Florida Posts: 30,279	"A ", but go just below the water line, less noise and splashing that way. Also, if the return outlet is just below the water level that will break siphon also. The return on my one tank with a sump is just below water level so it breaks siphon very quickly. Welcome to the nano forum. __________________ Less technology , more biology . Current Tank Info: 30 gallon half cube and 5.5, both reef tanks

08/31/2007, 07:46 PM	#4
tl_vang86 Registered Member Join Date: Jan 2007 Location: WI Posts: 26	sigh wow so glad i did not drill any holes!! i was thinking C hahaha. does it matter on the hole size at all ?? right now i only have a 5/32" bit, will that work ? so stress right now i just picked up some blue "tub" zoas and i dont want them to die because i am messing with the tank tonight. __________________ 29gal in the works Current Tank Info: 55gallon

08/31/2007, 07:39 PM	#2
NanoReefWanabe Registered Member Join Date: Oct 2006 Location: Barrie, Ontario, Canada Posts: 6,639	Niether A,B or C... it HAS to be INSIDE the tank about 1/4" to 1/2" BELOW the surface of the water....or however far down you want the water to drain...the siphon will break as soon as the water level goes below the drilled hole... also drill the hole in the side of the return line or on the back side of it...not on the top...other wise water will spray out of the tank when it is being pumped.. as long as the hole is parallel to the floor or slightly down ward you wont have any problems...

08/31/2007, 08:09 PM	#6
NanoReefWanabe Registered Member Join Date: Oct 2006 Location: Barrie, Ontario, Canada Posts: 6,639	ahh those bugger snails for got about them... i dont have a siphon break on my return, the pipe barely enters the water on my tank... 5/32 is pretty big hole..it doesnt have to be that big but that will work..only disadvantage is there will be more water spraying out the larger hole then the end of the tube, then if the hole was smaller..1/8" is perfect...LOL 5/32 is only 1/32 bigger i guess you will be fine..please ignore my ramble i am too tired to erase it all...LOL