Calculate Pump’s gph

[wiselyy73]

Plan to set up a water change station in the garage which is about 50-60 ft away from the tank. How strong of a pump do I need? What brands are reliable?

 

[redfishbluefish]

If you're going external, Iwaki or Pan World are great pumps.

Now 60 feet is a long run. I'd highly recommend using a head loss calculator to pick a pump that fits you're flow needs. I'd also recommend going with the largest diameter pipe you can handle....you'll get the best flow.

 

[mcarroll]

50 feet of 3/4" plumbing at 1000GPH will create almost 25 feet of additional head loss via friction.

Switching from 3/4" up to 1" will cut that added loss down to +8 feet.

Switching to 1.25" will cut that to +2 feet.

Let's use 1" for our example.

In a flow chart you'd look up 1000 GPH on one axis and [the height of your tank above the water source] + [added head loss from friction] on the other axis to see which pump will come closest to doing that.

Let's say the top of your tank is 4' above the water level in the garage. +8 feet makes total head pressure 12 feet, or about 3.6 meters.

1,000 GPH is about 3800 L/h.

Looks up 3800 L/h @ 3.6 meters on your flow chart to select the pump that's closest.

 

[wiselyy73]

I will pump in my sump instead of the tank which will less the head pressure seems it’s lower.