Thread: Help Needed with Water Pump Advice

Hoping some of you folk with more knowledge than me can help. Bit out of my depth to be honest.
We want to pump water from the creek, roughly 70 meters, and uphill to the water tank which is about 6 meters above the creek. This is out at the hut we've been restoring
Was just going to buy a portable 4 stroke pump with 2 inch inlet and outlet, and some lay-flat hose., The one Im looking at is rated 5.5 HP and capacity of 30m3 per hour
Any advice or suggestions would be great
Thanks

What I'm asking is whether a pump with this capacity is enough, given the distance and the lift

I'm pumping 90m elevation about 500m with 25mm pipe with a 4 panel solar system.
I measured it the other and at the tank doing 300l an hour.
Not heaps but enough as 30,000l tank

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Originally Posted by Bos

Hoping some of you folk with more knowledge than me can help. Bit out of my depth to be honest.
We want to pump water from the creek, roughly 70 meters, and uphill to the water tank which is about 6 meters above the creek. This is out at the hut we've been restoring
Was just going to buy a portable 4 stroke pump with 2 inch inlet and outlet, and some lay-flat hose., The one Im looking at is rated 5.5 HP and capacity of 30m3 per hour
Any advice or suggestions would be great
Thanks

How much fall do you have in the creek - can you fit a ram pump?

Originally Posted by hotbarrels

How much fall do you have in the creek - can you fit a ram pump?

I run a ram pump in our creek a biggish one 4" drive pipe.
But a young guy knocked one of these up.
They work.
Neighbour a piddly little one 1/2" fittings that beats away.
https://www.instructables.com/Hydraulic-Ram-Pump/

You need the pump curve. Some are designed for pressure (lift), others are rated for flow. Some can do both. HP rating is not enough to work on. That said, 6m lift is bugger all. There may be more head lost in the lines. What size line are you using. 2" is pretty large if you're filling just a tank. 30m3/hr is 8l/s. That's a slab of beer every second.

Originally Posted by kiwijames

You need the pump curve. Some are designed for pressure (lift), others are rated for flow. Some can do both. HP rating is not enough to work on. That said, 6m lift is bugger all. There may be more head lost in the lines. What size line are you using. 2" is pretty large if you're filling just a tank. 30m3/hr is 8l/s. That's a slab of beer every second.

A very quick look also has a 2" steel pipe giving 1.8m of head via frictional losses at 3.5m/s for 30m3/hr. This maybe an ask for the pump if you have it trying to suck up the hill as most need +ve NPSH to function correctly. This does not allow for any valves or a check in the line which you will most probably need to keep it primed. If you can leave the pump at the creek it would be easier.