Help with Sprinkler pump location

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HappyLaker

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Here is my scenario.

· This irrigation pump is for a DIY lawn springer system application at our cottage in Manitoba Canada.
· The total height from the lake to the top of the yard is 12 feet.
· To get the pump close to the shore, because of obstructions that I would have to work around, I would have to run approx. 200’ of power cable from the electrical panel to the pump. This obviously means heavier cable and more voltage loss. The alternative place I could install pump is @ 65 feet from the shoreline. This would allow me to run only @ 90 feet of electrical cable from the panel to the pump, which would mean less power cable, and less voltage drop. I would then just need more poly pipe between the pump and the foot valve.
· I will be using rainbird sprinkler heads 3 per zone which have a flow of 3.8 gallons per [email protected], and 3 gallons per minute @40 psi.


I guess the questions I have are:

1. In your opinion, could go with scenario #2 and place the pump 75 ft from waters edge and use more inlet poly pipe rather than going with such a long run of power cable ?
2. I was originally thinking of a 1 1/2 hp pump. Do you think I would need a 2 hp pump, and which pump could you recommend.
 

HappyLaker

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I have read through specs, and according a 1 1/2hp should do. But, it is easier for a pump to push water than pull water from what I have read. So, having said that is having the pump 75' from waters edge is a detriment.
 

Twowaxhack

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I have read through specs, and according a 1 1/2hp should do. But, it is easier for a pump to push water than pull water from what I have read. So, having said that is having the pump 75' from waters edge is a detriment.
Again, I’d have to read the pumps specs. or I’d call or email the manufacturer.
 

Twowaxhack

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Here is a link to learn about pumps and head pressures.
 

HappyLaker

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Again, I’d have to read the pumps specs. or I’d call or email the manufacturer.
Not just pump specs but here's a lot to consider. It's easy to determine pump under normal application. This is a theoretically pointed question...where can I locate the pump. The inlet side of pumps is hose 2" and outlet is 1 1/2". So maybe better to pull water through 2' pipe than push water through 1 1/2" pipe?
 

Twowaxhack

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Did you read the article I linked ?

It will explain what you need to know. I’m not going to type it all out when it’s already online for you to read.

Good luck to you.
 

HappyLaker

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Not just pump specs but here's a lot to consider. It's easy to determine pump under normal application. This is a theoretically pointed question...where can I locate the pump. The inlet side of pumps is hose 2" and outlet is 1 1/2". So maybe better to draw water through 2' pipe than push water through 1 1/2" pipe?
 

RS

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I think it would work fine having the pump 75 feet from the lake, many pumps are that far from a well. Keep the pump as low as possible to reduce suction lift, and run 2 inch suction pipe with a minimum of fittings, with a foot valve out at the end under the water. You will have to prime the pump and the entire suction line to get it to start up. We have 1 1/2 hp pump pumping from a lake, but the pump is 6 feet from the lake and only 4 feet above it, but I have about 50 feet of suction pipe, to get out in deeper water. We are able to run 10-12 heads at once, but maybe not as big as yours. good luck, and let us know how it works!
 

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