Return pumps and head height

[Mariette]

soooo are head height measurements universal or brand/pump specific. I’ve seen ones w the chart. But I also see ones that say max X gph rated for a max head height of X. For example, the Jebao DC 2000 controllable Nano Water Pump w level float (235-525 gph). It says “head pressure: 2.2 meters”. Does that mean that, w a head height of 2.2 meters, it can pump 235 to 525 gph? It’s called a “...NANO...” so I assume it’s not for a 110g tank but the math’s got me confused. Help!!! I should add that I don’t know the head height as of yet...

 

[Brad Miller]

Head pressure is defined as the height the pump will be discharging plus friction loss of the pipe and fittings on the discharge line, measured in feet of head.

 

[Mariette]

Head pressure is defined as the height the pump will be discharging plus friction loss of the pipe and fittings on the discharge line, measured in feet of head.

Thx Brad. So I’ve become familiar with what head pressure IS. It’s how it effects output that’s got me confused. Does that make sense or am I more confused than I thought I was? Would the pump above be able to handle 2.2 meters of head pressure and still pump 235 to 525 gph. Or does it pump 235 gph at 2.2 meters of head pressure?

 

[WVNed]

Head height is the distance between the water level the pump is pumping from to the water level of the vessel it is pumping to or the end of the pipe. whichever is higher.

 

[Rlreefing]

head height is where the pump output will become nearly 0 that means that the max height for the pump to pump water is 2.2 meters or about 7ft. When a pump is rated for specific flow rates they are usually for right out of the pump and will be greatly reduced for each foot it has to vertical climb. For a 110 I would get something with a minimum of 1750gph. I have a reef octo varios8 and 5.5 head and I am utilizing 65% power. do note that I also have 2 1" and 2 3/4" drains on my 120. also note that if you restrict the pumps flow through downsizing tubing it may effect the flow rates and may damage the pump.

 

[Mariette]

Head height is the distance between the water level the pump is pumping from to the water level of the vessel it is pumping to or the end of the pipe. whichever is higher.

Hmmm perhaps I’m not being clear on what my question is. I’ve tried to clarify in my above response to Brad. Does that make any sense?

 

[Mariette]

head height is where the pump output will become nearly 0 that means that the max height for the pump to pump water is 2.2 meters or about 7ft. When a pump is rated for specific flow rates they are usually for right out of the pump and will be greatly reduced for each foot it has to vertical climb. For a 110 I would get something with a minimum of 1750gph. I have a reef octo varios8 and 5.5 head and I am utilizing 65% power. do note that I also have 2 1" and 2 3/4" drains on my 120. also note that if you restrict the pumps flow through downsizing tubing it may effect the flow rates and may damage the pump.

AHA!!! That’s what I was looking for. Thank you!!!! I’m leaning towards the
Hydor Seltz D 2400 gph rated for a max head pressure of 15.1 feet.

 

[Mikeneedsahobby]

Normally the gph for a pump is listed at 0 head. So this pump is adjustable for 235- 525 at 0 head.

The head listed is normally max lift at 0 flow rate. So your pump can lift water up to 2.2 meters but will stall at this height.

It is best to look at a chart of head vs flow rate to really know what it will do with your head pressure. For jebao look for fish street for specs.

 

[Mariette]

Normally the gph for a pump is listed at 0 head. So this pump is adjustable for 235- 525 at 0 head.

The head listed is normally max lift at 0 flow rate. So your pump can lift water up to 2.2 meters but will stall at this height.

It is best to look at a chart of head vs flow rate to really know what it will do with your head pressure. For jebao look for fish street for specs.

Awesome thx!