Small engine driven water pump

Kidds

Member
Horticulture
The flow rate chart for that pump says it will work at that head, assuming minimal frictional losses through a 3" pipe it should be fine.
(someone more educated on such matters should be consulted before using my assumptions)

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Mursal

Member
Hire first, then decide ...............
Hire as close to the spec of the above pump, as you can

Wonder can you get replacement crankshafts for them?
 

Half Pipe

Member
@Pheasant Surprise
The part that puzzles me, I presume flow rate drops as head rises!?
Does this mean the friction loss in the pipe drops or does the shear weight of 3" of water in a length of pipe stop flow.

My 2nd thought , if pump not capable, would it manage if had a 2nd pump at 75m?
What problems would this create?
 

Half Pipe

Member
Hire first, then decide ...............
Hire as close to the spec of the above pump, as you can

Wonder can you get replacement crankshafts for them?
Like the idea of hire 1st easiest way to see if works or not.

I would think replacement crank be available as most copies of yanmar style engines. But cost of replacement crank and work involved probably means engine be scrap
 
@Pheasant Surprise
The part that puzzles me, I presume flow rate drops as head rises!?
Does this mean the friction loss in the pipe drops or does the shear weight of 3" of water in a length of pipe stop flow.

My 2nd thought , if pump not capable, would it manage if had a 2nd pump at 75m?
What problems would this create?

So for a given size/smoothness of pipe the frictional loss increases as you increase the flow. Try it in the calculator for different flow rates. You must assume a flow rate that the pump can manage as per below.

The Hyundai pump head vs flow diagram assumes just static head (as they don’t know about what length /size pipe your using) so that is the theoretical volume of water the pump will shift for a particlular static head.

The total dynamic head @ the pump = frictional loss (of pipe at said flow) + static head.
 

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