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Head loss calculation

roostertech

roostertech

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So I had to take a detour from my reef tank to redo my freshwater tank that was damaged during the move. This time I want to hide equipment under the sink cabinet (tank sit on top of countertop). This is my first brush of doing PVC plumbing so naturally it has been a mess. I tried to "clean up" the pvc cement as I would with extra pain, and learned the hard way it doesn't work.

Anyhow my biggest issue right now is the massive pressure loss. I'm running an eheim 350 which can push about 5ft of pressure.

By my calculation, I would have 2ft of pressure from the setup + 3 ft of elevation to the tank but from my first test it seems a lot worst.

Flow: https://goo.gl/photos/8x6Hf643PvttUszr6

I might have to rearrange the Co2 Rx to the intake side to avoid the double U turn of water flow. Any idea?


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I see a lot of elbows n a couple PVC to tubing adapter/reducers.

Each 90deg elbow is going to add 1' of head pressure. The reducers will add more.

The manual for the 350 says 5'11" from bottom of canister to top of water level for optimum operation.


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I read about the 90 degree = 1' somewhere too, but when I put 5 elbows into the calculator it gives 2' of head loss /confused.

Also does elbow matter on both in and out or just out.

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