Return line question

sam.basye · 10/17/2017, 12:46 PM

I just bought a new tank that came with a bunch of equipment and a sump.
The return pump has a barbed T fitting with a green line coming off of it before the main return goes into the UV sterilizer and back into the tank. It looks almost like a dosing line.
The previous owner didn't know what it did. He thought it was just an overflow..

Pump is a Rio 1700 and 3/4 return tubing.
The smaller tubing in the pic is not a part of it.

Any ideas what it's there for?

jacksonpt · 10/17/2017, 01:01 PM

Just guessing... maybe fed a refugium?

Reefpuck · 10/17/2017, 01:02 PM

Is there anything in that "bunch of equipment" that needs a water supply?

outy · 10/17/2017, 01:27 PM

some overflows needed to stay primed and used aqua lifters, that is what it could be used for among manner other imaginative explanations

ca1ore · 10/17/2017, 02:05 PM

Is the black thing a standard T or a venturi? If the latter, then it was likely an air vacuum for the U tube on a HoB overflow box. If a regular T, then who knows ... feeding something.

Dugless · 10/17/2017, 02:13 PM

Could be a make shift siphon break. Maybe?

dt204 · 10/17/2017, 02:16 PM

There is gunk in the green line by the looks of it. Maybe it was dosing something slowly into the pump line

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mcgyvr · 10/17/2017, 04:12 PM

Its a trumpet tube.. Blow into it while you turn the pump on

sam.basye · 10/17/2017, 05:55 PM

The tank is a 30 cube with custom overflow. It’s drilled which flows into a trickle filter in a 10g sump. No baffles or chambers. The skimmer sits next to the return pump and from there up to a UV sterilizer then out the return in the tank.

jacksonpt, no refugium from the info I got from the seller, who is the original owner, that bought the custom tank from a pet shop in its present setup a few years ago.

Cruiznblue, nothing I’m aware of

outy, that’s an interesting possibility

ca1ore, appears to be a standard barbed T with a threaded end. No HOB equipment to my knowledge.

Dugless, you might be onto something since the discharge nozzles are under the waterline and below the overflow teeth?

dt204, that’s a possibility, but wouldn’t the return be too much pressure for a dosing pump?

mcgyvr, I’ll definitely have to try that! Haha

ggdowski · 10/18/2017, 05:50 AM

Anti-siphon airline for when the pump is turned off.

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Xxero · 10/18/2017, 06:32 AM

Quote:

Originally Posted by mcgyvr

Its a trumpet tube.. Blow into it while you turn the pump on

Michael Hoaster · 12/03/2017, 11:12 AM

So this is what you've been up to!

That looks almost exactly like the setup I had for a calcium reactor, in my reef tank days. I'm sure you could connect it to just about any reactor you wanted. GFO, charcoal, bio pellets, chaeto - you name it!

Now that you've piqued our interest, how about a build thread?

10/17/2017, 12:46 PM	#1
sam.basye Registered Member Join Date: Feb 2014 Location: Lynchburg, VA Posts: 1,227	Return line question I just bought a new tank that came with a bunch of equipment and a sump. The return pump has a barbed T fitting with a green line coming off of it before the main return goes into the UV sterilizer and back into the tank. It looks almost like a dosing line. The previous owner didn't know what it did. He thought it was just an overflow.. Pump is a Rio 1700 and 3/4 return tubing. The smaller tubing in the pic is not a part of it. Any ideas what it's there for? __________________ }<`SAM`;{°< Current Tank: 30 Cube build: http://www.reefcentral.com/forums/showthread.php?t=2661418 26g Foam Rockwall build: http://www.reefcentral.com/forums/showthread.php?t=2457621 Foam Wall

10/17/2017, 01:01 PM	#2
jacksonpt Registered Member Join Date: Aug 2001 Location: Vestal, NY Posts: 3,679	Just guessing... maybe fed a refugium? __________________ Jackson - All advice I give is based on my first hand experience. YMMV. Current Tank Info: 38g (mostly LPS) with a 20g sump/fuge and all the other standard goodies

10/17/2017, 01:02 PM	#3
Reefpuck Registered Member Join Date: Jul 2004 Location: Georgetown, TX Posts: 1,122	Is there anything in that "bunch of equipment" that needs a water supply? __________________ Josh Current Tank Info: 90g mixed reef w/ 55g sump/fuge.

10/17/2017, 02:05 PM	#5
ca1ore Grizzled & Cynical Join Date: Apr 2006 Location: Stamford, CT Posts: 17,319	Is the black thing a standard T or a venturi? If the latter, then it was likely an air vacuum for the U tube on a HoB overflow box. If a regular T, then who knows ... feeding something. __________________ Simon Got back into the hobby ..... planned to keep it simple ..... yeah, right ..... clearly I need a new plan! Pet peeve: anemones host clowns; clowns do not host anemones! Current Tank Info: 450 Reef; 120 refugium; 60 Frag Tank, 30 Introduction tank; multiple QTs

10/17/2017, 04:12 PM	#8
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	Its a trumpet tube.. Blow into it while you turn the pump on __________________ Who me?

10/17/2017, 01:27 PM	#4
outy Moved On Join Date: Oct 2004 Location: auburn CA Posts: 4,021	some overflows needed to stay primed and used aqua lifters, that is what it could be used for among manner other imaginative explanations

10/17/2017, 02:13 PM	#6
Dugless Registered Member Join Date: Oct 2005 Location: Spokane, WA Posts: 416	Could be a make shift siphon break. Maybe?

10/17/2017, 02:16 PM	#7
dt204 Registered Member Join Date: Dec 2015 Posts: 233	There is gunk in the green line by the looks of it. Maybe it was dosing something slowly into the pump line Sent from my Pixel XL using Tapatalk

10/17/2017, 05:55 PM	#9
sam.basye Registered Member Join Date: Feb 2014 Location: Lynchburg, VA Posts: 1,227	Return line question The tank is a 30 cube with custom overflow. It’s drilled which flows into a trickle filter in a 10g sump. No baffles or chambers. The skimmer sits next to the return pump and from there up to a UV sterilizer then out the return in the tank. jacksonpt, no refugium from the info I got from the seller, who is the original owner, that bought the custom tank from a pet shop in its present setup a few years ago. Cruiznblue, nothing I’m aware of outy, that’s an interesting possibility ca1ore, appears to be a standard barbed T with a threaded end. No HOB equipment to my knowledge. Dugless, you might be onto something since the discharge nozzles are under the waterline and below the overflow teeth? dt204, that’s a possibility, but wouldn’t the return be too much pressure for a dosing pump? mcgyvr, I’ll definitely have to try that! Haha __________________ }<`SAM`;{°< Current Tank: 30 Cube build: http://www.reefcentral.com/forums/showthread.php?t=2661418 26g Foam Rockwall build: http://www.reefcentral.com/forums/showthread.php?t=2457621 Foam Wall Last edited by sam.basye; 10/17/2017 at 06:02 PM.

10/18/2017, 05:50 AM	#10
ggdowski Registered Member Join Date: Jul 2005 Location: Brighton/Pittsford, NY Posts: 494	Anti-siphon airline for when the pump is turned off. Sent from my iPhone using Tapatalk

12/03/2017, 11:12 AM	#12
Michael Hoaster Registered Seaweedist Join Date: Feb 2004 Location: Boulder, CO Posts: 5,807	So this is what you've been up to! That looks almost exactly like the setup I had for a calcium reactor, in my reef tank days. I'm sure you could connect it to just about any reactor you wanted. GFO, charcoal, bio pellets, chaeto - you name it! Now that you've piqued our interest, how about a build thread? __________________ As many naturalists and environmentalists have suggested, we should set aside our arrogance, our desire to conquer and control everything, and walk hand in hand with Mother Nature. -Walter Adey Current Tank Info: 180g Seagrass Sandbar Lagoon, START DATE November 28, 2018