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Old 06-16-2020, 10:44 PM #1
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irrigation line configuration fed by electric pump?

Hi Folks,

Curious to know your thoughts here. After hauling water last week I thought more seriously about a set it and forget it config. Have read BackCountry’s posts and others on this but no one has my answers.

- NorthStar 60 PSI/5.5gpm diaphragm pump
- 1/2” poly
- creek to plants: ~ 2’ lift, 15’ head (uphill), 60’ run
- Marine deep cycle (matched to Ah needs)
- 12v programmable timer
- 11 plants

Two questions:
- Any reason I can’t pump directly to the plants? Seems most people here commented to pump to rez’s buried uphill of plants.

- How should I configure the business end at the plants? Spaghetti lines, Drip emitters, halos, etc?

Thanks in advance!
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Old 06-17-2020, 12:14 AM #2
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When you write "Marine Deep Cycle" I 'm assuming this is a battery ... and I wonder how you will charge it?


I think your ability to charge the battery is a very important parameter in yr plan. How will you ensure recharge?


You should have enough pressure/volume to do without a reservoir. I would use 20mm (3/4 inch) hose for yr 60 meter run to reduce friction in the line.


You may have to organise a way to bleed off excess pressure to yr sprinklers if yr pump output exceeds sprinkler output.


Good luck!
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Old 06-17-2020, 01:03 AM #3
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Quote:
Originally Posted by F2F View Post
Hi Folks,

Curious to know your thoughts here. After hauling water last week I thought more seriously about a set it and forget it config. Have read BackCountry’s posts and others on this but no one has my answers.

- NorthStar 60 PSI/5.5gpm diaphragm pump
- 1/2” poly
- creek to plants: ~ 2’ lift, 15’ head (uphill), 60’ run
- Marine deep cycle (matched to Ah needs)
- 12v programmable timer
- 11 plants

Two questions:
- Any reason I can’t pump directly to the plants? Seems most people here commented to pump to rez’s buried uphill of plants.

- How should I configure the business end at the plants? Spaghetti lines, Drip emitters, halos, etc?

Thanks in advance!
F2F
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id consider these
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Old 06-17-2020, 02:44 AM #4
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Originally Posted by art.spliff View Post
Thanks for the feedback here guys.

ArtSpiff - I have those same exact emitters. Was thinking I’d need pressure compensated emitters to get equal delivery from beginning to end of run. Maybe if I crank progressively more and more open from start to end they could even out. Your second pic is probably the best way - a manifold at the head with equidistant feeds.

Cheers
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Old 06-17-2020, 02:57 AM #5
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Depending on your water source emitters, halos can clog easily. Why not just put plugs in your line ends and drill holes where you want water. If they get clogged - bigger holes.
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Old 06-17-2020, 03:01 AM #6
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Quote:
Originally Posted by Teddybrae View Post
When you write "Marine Deep Cycle" I 'm assuming this is a battery ... and I wonder how you will charge it?


I think your ability to charge the battery is a very important parameter in yr plan. How will you ensure recharge?


You should have enough pressure/volume to do without a reservoir. I would use 20mm (3/4 inch) hose for yr 60 meter run to reduce friction in the line.


You may have to organise a way to bleed off excess pressure to yr sprinklers if yr pump output exceeds sprinkler output.


Good luck!
Yep, deep cycle battery. I’ll only need enough charge to last a couple months. By my calculations I’ve got a battery with enough Ah (amp hours) to run every 3 days for 30-1hr, and make it through the dry season. Though, this is my weakest link. Calculations are not life. (Friction loss, slow drain, etxc)

Yep, friction needs to be planned for! Maybe ur right - 3/4”.

Regarding bleeding pressure - this pump is constant duty with bypass, which means the motor goes on standby when too much pressure is generated. But, pressure = slower irrigation which = longer run time = less battery life.

Thanks!
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Old 06-17-2020, 03:08 AM #7
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Originally Posted by Zeez View Post
Depending on your water source emitters, halos can clog easily. Why not just put plugs in your line ends and drill holes where you want water. If they get clogged - bigger holes.
Yeah, think this is correct as well. Wanting to go big to decrease run time but Stupid me hadn’t thought about clogs!

Cmoon- I have those and need to think on that more. Need to go Rez in this case.

Best
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Old 06-17-2020, 03:25 AM #8
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There are 12v and 24v pumps made for marine applications that are called 'on demand'. They only turn on when the pressure drops. Maybe this is an option with an irrigation valve. I use this setup to add nutes from a res.
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Old 06-17-2020, 03:15 PM #9
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Anyone have real life experience with this? I’m really curious about battery life calculations on paper versus in the bush.

If I have a 50 amp hour battery, and I pump for an hour every third day, in theory I could pump for 5mo (minus draw for the timer). But, I’m sure there is battery drain over time, and other inefficiencies, plus I don’t know how well the pump will run when battery gets on the low side.
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Old 06-17-2020, 10:39 PM #10
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Originally Posted by art.spliff View Post
Yeah man, so tempting, but I’m a little too “on the grid” to comfortably go that route. Though, I could probably pull it off. My plot is buried inside a bush honeysuckle forest, under power lines, which are under a flight path for the airport lol. Not much chance of choppers but I don’t really want to tempt fate.

I’ve been running some calculations on the battery and amp hours required...
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