Lake irrigation

[Jmathis]

New to this forum. Trying to figure out the following. I live on Kentucky Lake in TN, we have a permit with our boat dock for irrigation from the lake. Problem is the house is about 1000 feet from the water and the rise in elevation is from 359' to 580'. looking for suggestions on pipe size, pump size? this will be run by the appropriate size wiring according to local codes. Any help or direction would be appreciated.

Thanks, Jimmy

 

[Valveman]

New to this forum. Trying to figure out the following. I live on Kentucky Lake in TN, we have a permit with our boat dock for irrigation from the lake. Problem is the house is about 1000 feet from the water and the rise in elevation is from 359' to 580'. looking for suggestions on pipe size, pump size? this will be run by the appropriate size wiring according to local codes. Any help or direction would be appreciated.

Thanks, Jimmy

So, the lake is at 359' and the house is at 580' for a lift of 221' right? Oh, and how many GPM's do you want to irrigate with?

 

[Sponsor]

 

[Jmathis]

So, the lake is at 359' and the house is at 580' for a lift of 221' right? Oh, and how many GPM's do you want to irrigate with?

Correct on the footage of rise, I would guess not more than 10gpm. Most of the irrigation will be low pressure like drip irrigation but i also would like to water the lawn in areas that would require at least 10 gpm .

 

[Valveman]

Lifting 221' is about the same as 100 PSI. Adding the 50 PSI you need for sprinklers, you will need a pump that can do 10 GPM at 150 PSI. That is going to take a 10 GPM, 1.5HP submersible. I would use 1 1/4" 250# poly pipe and #6 copper wire. Up at the house I would use a PK1A-10 kit set for 40/60 and 50 PSI constant to control the pump. Oh, and make sure the pump has a flow sleeve and a good check valve.

 

[Jmathis]

Lifting 221' is about the same as 100 PSI. Adding the 50 PSI you need for sprinklers, you will need a pump that can do 10 GPM at 150 PSI. That is going to take a 10 GPM, 1.5HP submersible. I would use 1 1/4" 250# poly pipe and #6 copper wire. Up at the house I would use a PK1A-10 kit set for 40/60 and 50 PSI constant to control the pump. Oh, and make sure the pump has a flow sleeve and a good check valve.

Valveman, thank you so much. I have a 2 horse Grundfos that I was planning on using.

 

[Reach4]

A submersible pump would be twice as efficient. If you can safely put a submersible into a flow inducer sleeve, that will be good. That sleeve is basically a piece of PVC.

Pressure is in psi. So if you want to run an impact sprinkler, you will need more pressure up top.

When running power to the pump, you should decide if you want to put some outlets for shore power, while you are at it. If you just power the pump, that 1000 ft run could be smaller wire probably. My initial estimate is that you would need 10 awg copper for the run if you can use a 1/2 hp 240 volt motor. If you use a jet pump, you will a lot more power and bigger wire.

In using the pump, you may trade gpm for pressure. In other words, to drive the drip emitters, you could pull a lot more gpm than if you were driving that impact sprinkler that might want 60 psi.

I don't know if you could run just 2 wires to the dock, or if you would also need to run a ground wire too.

 

[Valveman]

Valveman, thank you so much. I have a 2 horse Grundfos that I was planning on using.

What is the pump model number?

 

[Jmathis]

A submersible pump would be twice as efficient. If you can safely put a submersible into a flow inducer sleeve, that will be good. That sleeve is basically a piece of PVC.

Pressure is in psi. So if you want to run an impact sprinkler, you will need more pressure up top.

When running power to the pump, you should decide if you want to put some outlets for shore power, while you are at it. If you just power the pump, that 1000 ft run could be smaller wire probably. My initial estimate is that you would need 10 awg copper for the run if you can use a 1/2 hp 240 volt motor. If you use a jet pump, you will a lot more power and bigger wire.

In using the pump, you may trade gpm for pressure. In other words, to drive the drip emitters, you could pull a lot more gpm than if you were driving that impact sprinkler that might want 60 psi.

I don't know if you could run just 2 wires to the dock, or if you would also need to run a ground wire too.

Thanks reach4, plan on running wire enough for extra outlets, etc.

 

[Jmathis]

What is the pump model number?

I'll have to check on the number...

 

[WorthFlorida]

Wiring to a boat dock for outlets, lighting, bonding and grounding has serious code requirements, meaning for safety. I know it is not your question but do look into it.