plumbing drain and return questions.

[The Guy]

I run a Speedwave 1320G - 24 volt DC speed controllable return pump and as mentioned dial it back to what you require or run it full out with a couple of T's after the pump to run reactors or what ever and or just dump extra flow back into the sump. This pump has worked great for me on my 90G reef with a 50G sump and was amazed with how quiet it runs compared to the Magdrive900 I had before. I would go with 1" for both your drains, herbie and your emergency overflow.

[LoJack]

Everyone so far has made great points.

That pump is massive … I ran 3600 GPH through a Reeflo Dart on a 144 gallon tank with 50 gallon sump, and 1 1/2" drains (Bean) And I dialed that down by switching to the other impeller that is about 2600 GPH because it was just too much flow. I also have 4 outlets going into the tank from the return pump.

The more you dial it down, the more wear and tear on the pump, hence the shorter its lifespan.

With a manifold and an overdriven pump, you'll also need to remember that once you get your overflow set with your gate valves, any time you try to isolate one of the reactors, as an example … you'll have to close the valve, which will increase the flow into you're main tank throwing off your Herbie.

Just make sure that you aren't banking on head pressure, and relief through your manifold to make sure your overflow can handle the volume. plugged reactors etc could cause volume spikes into the display … and then you'll be in for a wet feet surprise which is every reefers worst nightmare.