The return lines....thru the back OR over the back?

pmrossetti · 10/04/2009, 03:01 PM

Which do you do/prefer and why, please. Thank you

Playa-1 · 10/04/2009, 03:07 PM

Thru the back would be nice as long as they are at or above the water line. Over the back is nice so you don't have to drill extra holes in the tank. Backflow prevention and/or control is the key element in the deciding factor on the return lines.

pmrossetti · 10/04/2009, 03:11 PM

Thanks P, Usually the holes I've seen in the back are not high enough to prevent significant backflow. I wonder how close to the top you can make the hole??????

Playa-1 · 10/04/2009, 03:34 PM

That depends on how much water you can afford to allow to back-flow. Some sumps are bigger then others. It can also be manipulated with the position of the nozzles and/or strategically placed anti siphon holes in the return lines.

lordofthereef · 10/04/2009, 03:39 PM

My preference depends on wether or not there will be a canopy in use. I prefer over the back if there is a canopy for the reasons already mentioned above. Without a canopy though I think it looks tacky to have plumbing coming over the back of your tank. Through the back is much cleaner looking IMO in this case.

pmrossetti · 10/04/2009, 03:43 PM

+for the nozzles,but if using lockline I don't think they're water tight and water would drain to level of bulkhead not exit nozzle. For some reason I just don't trust the anti syphon holes.

Over the top offers no possibility of a leaky bulkhead and since tank is against the wall that's a good feature. Not as nice looking though. And you could cut pvc to be at water level, right? I think? Decisions, Decisions
Anything else? What have I missed? THANKS

lordofthereef · 10/04/2009, 03:59 PM

Quote:

Originally Posted by pmrossetti

+for the nozzles,but if using lockline I don't think they're water tight and water would drain to level of bulkhead not exit nozzle. For some reason I just don't trust the anti syphon holes.

Locline is water tight. It is perfectly safe to use as mentioned. Anti-siphon holes are a personal preference I guess, but if they are not allowed to get clogged up (regular maintenance), they really pose no threat. Also helps to make multiple holes in case one does clog that doesn;t mean 20 gallons of water on your floor

pmrossetti · 10/04/2009, 04:01 PM

HI l, Are you absolutely sure about lockline being water tight? That would be great news.

pmrossetti · 10/04/2009, 04:04 PM

IN fact that's my next thread. The lockline question!!!!!!! Here goes.

sedor · 10/04/2009, 04:04 PM

If your willing to drill through the back of the tank, why not drill through the bottom and add an overflow. That way you can come right up through the bottom of the tank and not have to worry about losing a siphon on an overflow box anymore.

pmrossetti · 10/04/2009, 04:08 PM

I've already decided on a center overflow box with 2 1.5" drains. However I want to limit the number of holes in the bottom of the tank, thus thru the back or over the top.

Tanks against a wall so internal overflow box.

lougotzz · 10/04/2009, 04:52 PM

I would drill and just use a larger sump, so if the power goes out the sump will hold it.

lordofthereef · 10/04/2009, 04:53 PM

Yes I am SURE locline is water tight.

EDIT: modularhose.com has a a Q&A

Q: Is Loc-Line water proof or leak-proof?
A: No. Loc-Line is designed to be leak resistant but it is not leak proof.

So I guess it is not leak proof. That said, I have had no issues, nor have I heard of anyone having issues with it.

lougotzz · 10/04/2009, 04:59 PM

I dont understand, why does the loc-line need to be water tights? The cracks and crevices in the lod line will not create a new syphon. Once the water level drops under the end of the hose the syphon is lost. If his sump can hold it what does it matter?

pmrossetti · 10/04/2009, 05:04 PM

Hey guys, just got an idea. Feedback PLEASE. What if I drill the return hole directly behind the internal overflow box at the top and use lockline to split the flow to both sides of the overflow box by removing one of the teeth of the top of the overflow on each side. Since the water in the overflow with Durso is lower than the DT level, no back flow,right? Only one bulkhead right?
What do you think?

10/04/2009, 03:01 PM	#1
pmrossetti Registered Member Join Date: Oct 2008 Location: Cali. Posts: 3,199	The return lines....thru the back OR over the back? Which do you do/prefer and why, please. Thank you

10/04/2009, 04:04 PM	#10
sedor Registered Member Join Date: Sep 2007 Location: Charlotte, NC Posts: 4,689	If your willing to drill through the back of the tank, why not drill through the bottom and add an overflow. That way you can come right up through the bottom of the tank and not have to worry about losing a siphon on an overflow box anymore. __________________ Ryan

10/04/2009, 03:07 PM	#2
Playa-1 Moved On Join Date: Jun 2007 Location: Laguna Niguel, CA Posts: 7,497	Thru the back would be nice as long as they are at or above the water line. Over the back is nice so you don't have to drill extra holes in the tank. Backflow prevention and/or control is the key element in the deciding factor on the return lines.

10/04/2009, 03:11 PM	#3
pmrossetti Registered Member Join Date: Oct 2008 Location: Cali. Posts: 3,199	Thanks P, Usually the holes I've seen in the back are not high enough to prevent significant backflow. I wonder how close to the top you can make the hole??????

10/04/2009, 03:34 PM	#4
Playa-1 Moved On Join Date: Jun 2007 Location: Laguna Niguel, CA Posts: 7,497	That depends on how much water you can afford to allow to back-flow. Some sumps are bigger then others. It can also be manipulated with the position of the nozzles and/or strategically placed anti siphon holes in the return lines.

10/04/2009, 03:39 PM	#5
lordofthereef One reef to rule them all Join Date: Sep 2009 Location: Leominster, MA Posts: 5,299	My preference depends on wether or not there will be a canopy in use. I prefer over the back if there is a canopy for the reasons already mentioned above. Without a canopy though I think it looks tacky to have plumbing coming over the back of your tank. Through the back is much cleaner looking IMO in this case.

10/04/2009, 03:43 PM	#6
pmrossetti Registered Member Join Date: Oct 2008 Location: Cali. Posts: 3,199	+for the nozzles,but if using lockline I don't think they're water tight and water would drain to level of bulkhead not exit nozzle. For some reason I just don't trust the anti syphon holes. Over the top offers no possibility of a leaky bulkhead and since tank is against the wall that's a good feature. Not as nice looking though. And you could cut pvc to be at water level, right? I think? Decisions, Decisions Anything else? What have I missed? THANKS

10/04/2009, 04:01 PM	#8
pmrossetti Registered Member Join Date: Oct 2008 Location: Cali. Posts: 3,199	HI l, Are you absolutely sure about lockline being water tight? That would be great news.

10/04/2009, 04:08 PM	#11
pmrossetti Registered Member Join Date: Oct 2008 Location: Cali. Posts: 3,199	I've already decided on a center overflow box with 2 1.5" drains. However I want to limit the number of holes in the bottom of the tank, thus thru the back or over the top. Tanks against a wall so internal overflow box.

10/04/2009, 04:52 PM	#12
lougotzz Moved On Join Date: Jan 2009 Location: PA Posts: 1,524	I would drill and just use a larger sump, so if the power goes out the sump will hold it.

10/04/2009, 04:53 PM	#13
lordofthereef One reef to rule them all Join Date: Sep 2009 Location: Leominster, MA Posts: 5,299	Yes I am SURE locline is water tight. EDIT: modularhose.com has a a Q&A Q: Is Loc-Line water proof or leak-proof? A: No. Loc-Line is designed to be leak resistant but it is not leak proof. So I guess it is not leak proof. That said, I have had no issues, nor have I heard of anyone having issues with it.

10/04/2009, 04:59 PM	#14
lougotzz Moved On Join Date: Jan 2009 Location: PA Posts: 1,524	I dont understand, why does the loc-line need to be water tights? The cracks and crevices in the lod line will not create a new syphon. Once the water level drops under the end of the hose the syphon is lost. If his sump can hold it what does it matter?

10/04/2009, 05:04 PM	#15
pmrossetti Registered Member Join Date: Oct 2008 Location: Cali. Posts: 3,199	Hey guys, just got an idea. Feedback PLEASE. What if I drill the return hole directly behind the internal overflow box at the top and use lockline to split the flow to both sides of the overflow box by removing one of the teeth of the top of the overflow on each side. Since the water in the overflow with Durso is lower than the DT level, no back flow,right? Only one bulkhead right? What do you think?