L/min v psi on water pump

[Cush]

Looking to get a spare / replacement water pump for the very old original whale. Would you go for 10l/min at 30 or 40 psi?

Always thought flow rate would be a product of psi but apparently not. Every day is a school day

 

[Two on Tour]

Looking to get a spare / replacement water pump for the very old original whale. Would you go for 10l/min at 30 or 40 psi?

Always thought flow rate would be a product of psi but apparently not. Every day is a school day

Will the joints and fittings on your pipework system take a 10 psi increase in pressure without popping or leaking ?

 

[Cush]

Just checked current one is 30 psi so that’s what I’ll go for . Just wondering what effect the additional pressure has on flow rate. Is it the pressure it maintains in the system or the pumping force when the tap is open?

 

[mitzimad]

putting you finger on the end of a hose doesnt change the pressure only the flow rate

 

[Pausim]

Pressure or psi is how hard the pump is pushing the water. Flow or l/min is how much water the pump can shift. You need the right combination of the two to get a decent shower. Too little pressure and the pump will not be able to push the water hard enough to get it to the shower head and eject it with enough force to create a spray. However even if you have lots of pressure if the flow is too small you will not get enough water for a good shower.

Think of water pistol that squirts a small amount of water a long way, it doesn’t deliver enough to soak the person on the receiving end, that is because it has lots of pressure but very little flow. In contrast an open ended hose siphoning a bucket that is only 3 feet above it can quickly empty the bucket because there is a good flow, however it will not project the water very far because there is very little pressure (only 1.3 psi). Given pressure and flow you can have a nice shower.

^{_{Subscribers  do not see these advertisements}}

 

[Gaston aires]

I would buy one the same or near the original one.
Phil upmesink

 

[Cush]

I would buy one the same or near the original one.
Phil upmesink

That’s the plan. Now. Old one is a whale 8l/min @ 30 psi. Will choose something similar from shurflow. Whale are about twice the price!

 

[Cush]

Pressure or psi is how hard the pump is pushing the water. Flow or l/min is how much water the pump can shift. You need the right combination of the two to get a decent shower. Too little pressure and the pump will not be able to push the water hard enough to get it to the shower head and eject it with enough force to create a spray. However even if you have lots of pressure if the flow is too small you will not get enough water for a good shower.

Think of water pistol that squirts a small amount of water a long way, it doesn’t deliver enough to soak the person on the receiving end, that is because it has lots of pressure but very little flow. In contrast an open ended hose siphoning a bucket that is only 3 feet above it can quickly empty the bucket because there is a good flow, however it will not project the water very far because there is very little pressure (only 1.3 psi). Given pressure and flow you can have a nice shower.

Appreciate that clear explanation. Thank you. Painted a very clear picture