Mrx7899
Valuable Member
Really like the idea of two return pumps for my tank but my tank only has one return line think you guys can make a little video on different options for hooking two return pumps on one return line.thanks
2 return pumps one return line
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I think that will defeat the purpose of having two pumps. If one goes out, the path of least resistance is going to bypass your aquarium and send the return water right back into your sump...
MaiReef
Valuable Member
No video, but putting check valves on the lines would help before the T, but the force would really be pushing against itself. You would be better off with two return pumps with check valves and ball valves, but only use one and either have it turn off and the other on when the flow or voltage is not correct.
pluikens
Valuable Member
Run the pumps in series? If you have experience with this, I'm definitely interested to hear how it would work but I would be very hesitant to plumb the outlet of one pump into the inlet of another. I don't see how this would increase flow to the display if the second pump isn't running and if both pumps are running, then the flow to the tank would be regulated by the flow created by the second pump's impeller. I would like to see BRS start carrying schedule 80 wye fittings. If I were to run two return pumps (which may be a good use for my AC pump when I upgrade to a DC return as the primary), I would wye in a second pump after my check valve that the main pump flows through and would also have a check valve before that wye from the second pump. I would use the fitting: https://www.pvcfittingsonline.com/1-schedule-80-pvc-wye-875-010.html upside-down from how it's shown in the picture on the product page. Main Pump > Swing Check Valve > Wye straight plumbed to DT. Secondary Pump > Swing Check Valve > 45 degree into wye going to DT. Keeping the check valves as close as possible to the two inlets of the wye.
OP
OP
Mrx7899
Valuable Member
I do not have any experience with either set up. I came across them when doing research. When plumbing them in a series it will increase head pressure not so much flow but I'm not looking to get more flow just looking to always have flow if one fails and I'm not around to switch it out.
I don't see why it wouldn't work using that y fitting with 2 check valves as close to the ends as possible and 2 equal size pumps.
I don't see why it wouldn't work using that y fitting with 2 check valves as close to the ends as possible and 2 equal size pumps.
pluikens
Valuable Member
I believe the wye would also decrease pressure head on the pump with lower flow by venturi effect. Hey @randyBRS @Ryanbrs , I think I have an upcoming BRSTV Investigates topic! I'd like to see some tests similar to the "Which reduces more flow, 45 or 90 degree elbows" flow test video but with the Neptune FMK utilized to test flow rates of multi-pump returns. 1. Single return pump, 2. two pumps with same flow rating as the first pump, 3. two pumps each with half the flow rating of the first pump. Thanks!
This would make for one great BRStv Investigates video! Not sure we'll be able to get to it right away, but I'll definitely add it to the idea board!
-Randy
mfinn
likes zoanthids
Why 2 return pumps?
We had a good discussion about return pumps for our ULM Tank Trials series, in which 2 returns were brought up. Here's the point in the video where Ryan talks about them briefly and then again later in the vid. HERE
mfinn
likes zoanthids
My thought on that involves buying quality equipment in the first place.
In more than 30 years in the saltwater hobby, I've never had a return pump fail outright.
As far as the tank not lasting long without heat, your house would have to be pretty cold to have the tank cool off fast.
I've had power outages that lasted for days and when I had a single generator I would turn it off late at night and then back on early in the morning so my tanks didn't have heat or circulation for 4-5 hours. I never had any serious problems.
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Mrx7899
Valuable Member
I buy quality equipment but you never know. My tanks are in my basement I live in Jersey and in the winter if I lost my return pump my tank would be pretty cold because my basement is about 64 degrees.
Clownfish2
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Having 2 return pumps is as redundant as having 2 jet engines when flying. Jet engines are very reliable, but sometimes they can fail, catch fire, or swallow a goose. My next build will have 2 return pumps.
mfinn
likes zoanthids
LOL, that's too funny. I can really see the connection between jet engines and aquarium return pumps.
