DIY Sump: GPH on a 2 inch hole?

[DannyBoy17]

So the hole in my tank is 2'' in diameter I believe. If I were to build a sump, where gravity pull the water into the sump, how would I calculate the GPH needed with the pump?

DB

 

[Lateral Line]

Not possible to say with the information given. A hole near the bottom of a tank will have more pressure and therefore flow on it then one nearer the surface. A deeper tank will throw more pressure differential then a shallow one. An overflow can take any kind of pump upto a maximum determined by similaly absent parameters.

 

[Blacky]

biuld a weir around the hole and the you get a many gph as the pump states on the packet and also you are then garenteed no tank or sump over flows!!!!!

 

[chrisdoesntmiss]

I restarted this thread as i thought it could be useful, sorry if no one cares

Where is the hole located in the tank ?

When you know how much water will be drained off from the tank you can build a sump with that capacity and get a pump to suit.

To work out the gallon per hour you put a 5 gallon bucket at the end of the pipe work, start the flow and take a measure of how long it takes to fill the 5 gallons. The divide the volume by the time. Work out how much volume in one minute and then multiply by 60 to give you the hourly volume.

For example

5 gallons takes 5 minutes = 1 gallon per minute

1 gallon per minute x 60 minutes = 60 Gallons per hour.

Not the most complicated suggestion but still works

Chris