TheWiggman
Haters' gonna hate
There's a lot of confusing information in here.
For starters, flow into the start of a pipe = flow out. Simple as that.
The pressure will be different through the pipe. Highest at the discharge of the pump, lowest/zero (assuming guage pressure, atmosphere is zero) where the water comes out.
The little green pumps are centrifugal pumps which means they have an impeller that spins to apply pressure to move the water. Picture this -
Hydraulic (gear, piston etc.) and peristaltic style pumps are positive displacement - that means they push a fixed volume of water, and the pressure is induced by the system. This is a completely different scenerio.
There is nothing wrong with your pump. The flow is what it is, and yes the pipe diameter will provide quite a bit of backpressure. Blow through it with your mouth and if you feel resistance, this resistance is much higher pushing liquid through it. I put in a HERM-IT coil and my flow basically halved.
If you want more flow - move the two tank HEIGHTS closer together. It's the difference in pressure that determines your static head, so lifting the bottom tank has the same effect as lowering the top tank. Moving the pump and and down between the two won't make a difference once it's primed for a home brew scenerio.
For starters, flow into the start of a pipe = flow out. Simple as that.
The pressure will be different through the pipe. Highest at the discharge of the pump, lowest/zero (assuming guage pressure, atmosphere is zero) where the water comes out.
The little green pumps are centrifugal pumps which means they have an impeller that spins to apply pressure to move the water. Picture this -
- You have a hose that goes vertically. The pump will push water up the hose until it reaches it's max operating pressure at the discharge of the pump. The height of this column of water is referred to as maximum head / pressure (pressure = density x height x accel. due to gravity. Or simply, 10m = 100 kPa). For these pumps, max head = 3.4m or 34 kPa. Hence the water will be pumped up to a height of 3.4m REGARDLESS of the daimeter.
- Imagine you trim the pipe off at 3.39m. A tiny, little bit of water will trickle out. Your pump is now pumping. Pressure will be 33.9 kPa at the pump discharge.
- If you continue to trim the pipe off lower and lower, more flow will come out because there is less water in the pipe vertically applying pressure at the pump.
- Continue this until the pipe is gone and the pump is spitting out water. This is the max flow it is able to acheive, at essentially zero pressure.
Hydraulic (gear, piston etc.) and peristaltic style pumps are positive displacement - that means they push a fixed volume of water, and the pressure is induced by the system. This is a completely different scenerio.
There is nothing wrong with your pump. The flow is what it is, and yes the pipe diameter will provide quite a bit of backpressure. Blow through it with your mouth and if you feel resistance, this resistance is much higher pushing liquid through it. I put in a HERM-IT coil and my flow basically halved.
If you want more flow - move the two tank HEIGHTS closer together. It's the difference in pressure that determines your static head, so lifting the bottom tank has the same effect as lowering the top tank. Moving the pump and and down between the two won't make a difference once it's primed for a home brew scenerio.