Question - return plumbing

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Hi - quick question I hope.

I am currently running two return pumps each plumbed into separate 1" Sea Swirls. They are on opposite sides of the tank one in the front, one in the back. The one in the front is taking a bit too much room and the other one is too close to a rock so I was thinking about going back to 1 unit and placing it on the back center.

My question is this with respect to how return pumps work, pipes, etc. I'd still like to use the two returns (redundancy) so was thinking to remove the one Sea Swirl and then connect its line into a T which runs to the existing pumps line and move the Sea Swirl in the middle. So think single track or pipe but being feed by a pair of pumps. The random flow generator nozzle at the end can handle the pressure I'm pretty sure since it is 720-1,000 rated I believe.

My return pumps are a Cor 15 and a Cor 20. The 20 was used on the one furthest away or longest plumbing line. I alternate 4 times a day switching power between the two. So one is 100% the other 20% then other side 100% and the other back down. In this case I could do something similar but not sure how the water would treat the pipe or if it even matters. Just trying to save some space then use the 2nd one as a spare should something happen. This is what happens with a 54" wide tank and my vision not working correctly :D
 
Hi

I am not sure I am following 100%. We want to run the 2 pumps into one line, correct. If that is the case, it can be done. If the swirl can handle the gph the pvc will. If you were thinking to alternate between the 2 pumps, I don’t see any benefits. Your still getting flow from the swirl so it will not matter which pump it comes from. Varying power levels between the 2 pumps will give an affect like high tide/ low tide but wavemakers should do that unless the only flow is from the swirl.

If you plumb 2 pumps to 1 line I would run just one about 80% so I don’t burn it up. Then just kick on the second if the first fails. I run 2 returns, I used soft hose attached to an up and over return. The nose was flexible to tuck away in the stand and you have more flow.

I hope I kinda answered .
 
Yes, you answered actually what I was trying to ask :) Thank you. The main question was if I can run the two into a single line and yes. You raised something I need to check with regards to the sea swirl. I didn't check that yet so great catch.

Thanks a million. Appreciate it!
 

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