ext. overflow plumbing

mathman7728 · 06/15/2014, 09:03 PM

Hi,

i know there are many talk tracks on these forums regarding plumbing the overflow box but i must be stupid.

i have a 6" (deep) by 10" (height top to bottom) x 42" (coast to coast) external overflow with three 1' bulk heads on the bottom (note these are not on the side as in the photos of the bean animal).

I plan to use the bean animal design but it still isn't clear to me how tall do i make the three standpipes? or am i missing something basis on the bean design??

thank you!

RocketEngineer · 06/16/2014, 07:14 AM

Since I started running a BeanAnimal setup in an external overflow, I have been playing around with the standpipe heights and finally think I found what works best. The siphon should be about 1.5" above the bottom of the overflow box. The Durso elbow top (opening) is about 1" above the top of the siphon and the emergency drain is about 1" above that.

This is what has worked best for me so far.

HTH,

mathman7728 · 06/16/2014, 11:23 AM

thank you but i have to ask is how did you figure out that these differences in pipe height were the "right" ones for you? looking at the bean sight doesnt suggest differences...

also, how did you test these different lengths? the pipe needs to be connected to the bulkhead so once connected (glued) you cant change it without chaning the bulkhead, correct? what am i missing?

RocketEngineer · 06/16/2014, 11:44 AM

I figured it out by testing the system about a dozen times just after I got my new return pump and a bunch more since then. The most solid restarts were in this configuration where the siphon would purge quickly, the emergency drain just barely stayed dry and the Durso ended up with just the minimal amount of flow once everything has stabilized.

The fittings on the inlet side of the bulkhead (those in the box) don't need to be glued either together or to the bulkhead. In my case, when the return pump stops the water drops below the edge of the internal overflow so even if they did leak, it would just empty the external box which I accounted for in my sump design. Since they aren't glued I have been able to remove the three stand pipes, either cutting down or inserting a new section of pipe and then trying the system again. I had been running it slight different before I got the new pump but given I more than doubled the flow through the system, I had to adjust everything over again (after I removed the snail from the siphon pipe).

s2nhle · 06/16/2014, 12:00 PM

Thank you for sharing.

Donkeykong · 06/16/2014, 12:23 PM

They dont have to be glued just a snug fit, I wrapped the pipe with plumbers tape to ensure it was snug enough but still allowed me to remove it with a few good twists.

06/15/2014, 09:03 PM	#1
mathman7728 Registered Member Join Date: Jan 2010 Location: Gig Harbor, WA Posts: 230	ext. overflow plumbing Hi, i know there are many talk tracks on these forums regarding plumbing the overflow box but i must be stupid. i have a 6" (deep) by 10" (height top to bottom) x 42" (coast to coast) external overflow with three 1' bulk heads on the bottom (note these are not on the side as in the photos of the bean animal). I plan to use the bean animal design but it still isn't clear to me how tall do i make the three standpipes? or am i missing something basis on the bean design?? thank you!

06/16/2014, 07:14 AM	#2
RocketEngineer Space is big. Join Date: Feb 2007 Location: Maryland Eastern Shore Posts: 3,226	Since I started running a BeanAnimal setup in an external overflow, I have been playing around with the standpipe heights and finally think I found what works best. The siphon should be about 1.5" above the bottom of the overflow box. The Durso elbow top (opening) is about 1" above the top of the siphon and the emergency drain is about 1" above that. This is what has worked best for me so far. HTH, __________________ -RocketEngineer "Knowledge is what you get when you read the directions, experience is what you get when you don't." - Unknown Current Tank Info: None Currently

06/16/2014, 11:44 AM	#4
RocketEngineer Space is big. Join Date: Feb 2007 Location: Maryland Eastern Shore Posts: 3,226	I figured it out by testing the system about a dozen times just after I got my new return pump and a bunch more since then. The most solid restarts were in this configuration where the siphon would purge quickly, the emergency drain just barely stayed dry and the Durso ended up with just the minimal amount of flow once everything has stabilized. The fittings on the inlet side of the bulkhead (those in the box) don't need to be glued either together or to the bulkhead. In my case, when the return pump stops the water drops below the edge of the internal overflow so even if they did leak, it would just empty the external box which I accounted for in my sump design. Since they aren't glued I have been able to remove the three stand pipes, either cutting down or inserting a new section of pipe and then trying the system again. I had been running it slight different before I got the new pump but given I more than doubled the flow through the system, I had to adjust everything over again (after I removed the snail from the siphon pipe). __________________ -RocketEngineer "Knowledge is what you get when you read the directions, experience is what you get when you don't." - Unknown Current Tank Info: None Currently

06/16/2014, 11:23 AM	#3
mathman7728 Registered Member Join Date: Jan 2010 Location: Gig Harbor, WA Posts: 230	thank you but i have to ask is how did you figure out that these differences in pipe height were the "right" ones for you? looking at the bean sight doesnt suggest differences... also, how did you test these different lengths? the pipe needs to be connected to the bulkhead so once connected (glued) you cant change it without chaning the bulkhead, correct? what am i missing?

06/16/2014, 12:00 PM	#5
s2nhle Registered Member Join Date: Sep 2012 Posts: 298	Thank you for sharing.

06/16/2014, 12:23 PM	#6
Donkeykong Registered Member Join Date: Jul 2003 Location: Grover Beach CA Posts: 1,847	They dont have to be glued just a snug fit, I wrapped the pipe with plumbers tape to ensure it was snug enough but still allowed me to remove it with a few good twists.