/r/Irrigation

Photograph via snooOG

This is a place for professionals and non-professionals alike to discuss irrigation. Ask a question, ask for help, show off your work (no advertising), or show us what some idiot did. Just keep it cordial. Check out the user and post flair, and think about adding it to your post.

If you receive help from this sub, please let us know how we helped you.


The Irrigation Reddit

Irrigation - the artificial application of water to the land or soil. It is used to assist in the growing of agricultural crops, maintenance of landscapes, and revegetation of disturbed soils in dry areas and during periods of inadequate rainfall. Additionally, irrigation also has a few other uses in crop production, which include protecting plants against frost, suppressing weed growth in grain fields and preventing soil consolidation. In contrast, agriculture that relies only on direct rainfall is referred to as rain-fed or dryland farming.

Irrigation systems are also used for dust suppression, disposal of sewage, and in mining. Irrigation is often studied together with drainage, which is the natural or artificial removal of surface and sub-surface water from a given area.

Irrigation has been a central feature of agriculture for over 5000 years, and was the basis of the economy and society of numerous societies, ranging from Asia to Arizona.

Wikipedia: Irrigation


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/r/Irrigation

24,712 Subscribers

1

Extending irrigation system, backflow prevention questions

Hi folks. I’m looking to extend my irrigation system and want to make sure I’m going about backflow prevention correctly. I’m in CA, current system uses anti-siphon valves appropriately above grade from sprinklers.

Current setup: water main comes in from street to side of house, where it splits to feed the main house water line, a hose bib, and one set of 3 AS valves. At the front of the house, a branch off of the house line exits the crawl space and feeds a different set of 3 AS valves and a hose bib. It’s at this point (pre valves) that I’m planning to tap off and run ~80’ of buried pvc to the other side of the house, where I’ll feed a few more AS valves and a stubbed-up hose bib.

Does this all sound right? Does adding a hose bib after this new 80’ of buried pipe mean I need any additional backflow prevention? Is this setup with AS valves sufficient?

Many thanks!

0 Comments
2024/03/26
03:54 UTC

1

Feed irrigation system with city water?

A couple of my spring lawn amendment applications need to be watered in afterwards. My area doesnt turn on the dedicated irrigation lines until late April. Can I feed my irrigation system from my city water (bib to bib) with a simple vacuum breaker in line to avoid backfeed? My valve from the irrigation main is already off from fall blowout.

4 Comments
2024/03/26
00:19 UTC

0

Rotor doesn't water close to the head?

Are there any rotors that are better at watering the ground right in front of them? Currently using rainbird 3500s and they put out a lot of water at the end of the arc 30ft away, and it stays way to dry within 10-20ft beside the rotor itself

3 Comments
2024/03/26
00:06 UTC

0

Looking for work

Hello everyone, I recently started my own business and I'm seeking opportunities for work. I'd appreciate any advice or leads on where to find potential clients or projects. I'm based in Houston, Texas. Thank you!

4 Comments
2024/03/25
21:46 UTC

0

Drip line help

Hi all! I have done some minor drip line work before so I understand how to connect the offshoots to the main line, however, I don’t quite remember how to connect it to the source (pvc irrigation pipes if I remember correctly).

I have attached a picture of the current irrigation setup at my home. I would like to tap in to this. Could someone point me in the right direction on what I need to do?

Thanks so much.

2 Comments
2024/03/25
18:33 UTC

1

Quick question

What is the reason behind selecting different drip line sizes if some of them offer the same water flow? Do larger sizes cover larger areas? Like 1/2 covers up to 200 feet and 5/8 covers up to 250 feet?

1 Comment
2024/03/25
18:06 UTC

0

Need to attach hose to back flow device outside

So I just moved into a house that’s got back flow devices attached to the spigots. When I attach a hose most of the water comes out of the holes. Do I need an o-ring or something? Or is this the whole point of the attachment?

1 Comment
2024/03/25
17:51 UTC

2

Cost to move a sprinkler head?

I had some landscaping done and one of the sprinkler heads were buried underneath dirt and rocks. Any idea on how much it would cost to move the head and maybe line like 2-4 feet? Hoping we don’t need to move the rocks.

9 Comments
2024/03/25
16:42 UTC

1

Pressure tank install

Hi I am adding a 4gallon pressure tank above my irrigation pump. Will 6 in of 1" pvc sched 40 be adequate if installed between pump and tank? Or brass Thanks

3 Comments
2024/03/25
14:40 UTC

2

Help grounding 2-wire system

Hi there, we ordered a 2-wire irrigation system for our small market garden. Following the advice from Hunter and the irrigation company, I understand that I need to ground the system at the controller and at the last decoder (there are currently 9).

The grounding equipment they supplied is different to what Hunter have in their manuals, and the customer service from this irrigation company is... non-existent (won't work with them again, obviously). So I've come here for advice.

The equipment we have:

  • Hunter HPC controller
  • Hydrawise Ez-1 Decoders
  • 2 core 1.00m2 cable
  • 2x 1.8mm earthrod, copper
  • 4x Earthrod clamp
  • 6mm Earthwire

I am not really sure how I actually connect the earthwire to the controller and the final decoder. My electrical knowledge is fairly minimal, but I can follow a diagram if anyone is able to do a rudimentary illustration?

25 Comments
2024/03/25
03:25 UTC

3

How to fix this

How can I fix this myself? This is my first home with a sprinkler system (zone 8b) and water froze and caused this to burst.

10 Comments
2024/03/25
02:51 UTC

5

Antique Skinner S-750 3/4” brass impact sprinkler

1 Comment
2024/03/25
01:09 UTC

0

Drip irrigation fittings leaking

Hi all!

I am very much a newbie to drip irrigation and I am about to rip out my hair with all the issues I’m having.

I’m trying to set up a pretty simple raised bed drip irrigation system. I was really excited that I had finally set up everything…until I turned on the hose. As you can see from the video, it’s a disaster!!!

I got the 1/2” mainline, pressure regulator, and backflow preventer from a local nursery. The adapter and 1/2” compression elbows are from Home Depot.

Where did I go wrong???

24 Comments
2024/03/25
00:46 UTC

3

I don't think I blew out my DIY'd sprinkler system correctly (MN)

In 2023, I designed my own sprinkler system and did not bury the lines low enough, so I knew I had to blow it out for the winter. Long story short, I spent an entire day trying to blow the lines out. I even went and got a larger air tank to do the job.

As seen in the image below, I originally hooked it up to the brass hose connection there but then even took it a step further and cut the PVC pipe that was close to the pressure gauge

The valves are connected to the PVC pipe and when I was blowing them out, I manually turned each valve. I heard air coming out of the sprinkler heads, but not much for water. What did I do wrong? I'll likely have to repair some broken lines, but I am also trying to redesign my setup. I've watched a few videos on YouTube on how to blow out sprinkler systems, but I guess mine is too simple. This setup did work well for me during use.

Thanks for any input!

https://preview.redd.it/na1m1ajsedqc1.png?width=577&format=png&auto=webp&s=0cb76733fe0b8d45e4cf388cb4c73e2c2a9b16de

14 Comments
2024/03/24
23:59 UTC

1

Post home pressure increase for irrigation.

I have a spring reservoir and pump that provides all my water. Pressure at the house is adequate. Pressure for the hose for watering is adequate, but the pressure is not quite there to run two lawn sprinklers in series. This is especially noticeable when they are another 20 ft in elevation above the house. Given that I have a newly planted lawn and it’s large enough to need two sprinklers to cover it, is there a way to add pressure to the water between the outdoor faucet and the sprinkler? The main reason I ask is because in order to adequately water the area, I would need to walk across the new grass which I also do not want to do.

5 Comments
2024/03/24
23:03 UTC

0

Sprinkler Head

I thought my Hunter rotary sprinkler head wasn't hitting the right distance because of water pressure or it was the sprinkler itself.

I had my landscaper swap it out. He's like this is as far as the new one will go. I was like interesting. I'm thinking and thinking. I take my leveler outside and that sprinkler head is at a 5 degree plus downward angle. It's not level. That's the damn problem.

Do you guys typically make sure sprinkler heads are in fact level?

18 Comments
2024/03/24
22:59 UTC

3

Cleanest way to replace this tee?

Trying to replace this broken tee, but I’ve been going around in circles trying to do it without either digging up a ton of pipe going left and right or Frankenstein-ing the shit out of it. Any suggestions?

11 Comments
2024/03/24
22:26 UTC

0

Hunter Node 100

Weird issue that just recently started with one of my Hunter Node-100 units.

Manual or auto, it does send the power to the solenoid, but does not maintain power. As in, initial power is sent , solenoid makes noise & moves up/open, but the node-100 does not maintain power & immediately, the solenoid returns to closed.

Changed the batteries & already reset the Node 100. The issue is not on the solenoid (tested it with a manual 9v & solenoid will stay open. Also tested another new solenoid on the same node-100. Everything has been working fine for years.

Any ideas?

13 Comments
2024/03/24
21:26 UTC

1

Sprinkler System Not Working (Rachio 3)

https://imgur.com/a/rRTm7NO

Hey all, see imgur link above. Each picture has a description.

I replaced an old sprinkler controller in July 2022 with a Rachio 3, which has worked extremely well since. In late 2023 I had my system winterized prior to winter, as I did each year. Around the same time I was cleaning gutters and I removed an old rain sensor and cut the wire going to it, as I never used or needed it with the Rachio using weather data which had been sufficient.

So this week I went to dewinterize to get things kicked in again, turned on water valve in basement etc as usual. Rachio I took out of standby mode and it looks totally normal from the device and app. However, I cannot get anything to kick on. It's like the valve boxes never get a signal to open, even though Rachio shows it sent the signal and thinks things are running fine...

I did some research and I found other posts with similar issues indicating the common wire may be inlined with the rain sensor I removed. I followed advice and tried a combination of things at the Rachio and no success. Is there anything you guys can see from the pictures that woukd help? I have a hunch I can get into the valve utility box and remove the rain sensor from the whole operation, but cannot find a matching wire...

Last but not least I have always had Rachio set to have S1 and S2 disabled, even though you see them wired into S1.

I can't think of anything else that would have happened to cause this other than the rain sensor removal.

Thanks!

15 Comments
2024/03/24
21:15 UTC

4

How would I fix this leak?

The middle t fitting is leaking. How would I fix this?

20 Comments
2024/03/24
21:14 UTC

0

? re setting up a backyard gravity irrigation system.

I am setting up new rain barrel gravity system. The slope of the area is great -- both south and west, and the trees to be watered run in a line, one south, one west.

Do i need 2 lines running out of the barrel (complicated, b/c I have install another faucet in the barrel) or can i use one line and branch it with a T connector after the water passes through the filter, regulator, etc.

Thanks in advance!!

3 Comments
2024/03/24
20:54 UTC

2

Design question, switching from rotors to sprays ?

Hello,

Location : french riviera

We asked a pro a few years ago to get our irrigation system back in shape. For this area, he replaced some old spray heads with just 2 rainbird 5004 rotors. I really love their reliability and wind resistance but there are 2 problems :

  • they go too far, just to avoid spraying the alley below I have to "kill" the spray uniformity.
  • as they're placed high on the ground (4ft / 1,2m), I feel like the first meters are getting less water than the back, while I'd like the opposite (front is densely planted with small plants, back has bigger shrubs).

My idea is to water "heavily" only the first 12ft / 3,5m (or even 7ft / 2m if I want to avoid spraying the lavenders) and run a drip line for some of the shrubs below. Area is 20ft / 6m wide. I'm not sure what would be the best option for that :

  • Rainbird 3004 ? still gonna go too far IMO
  • MP Rotator 800 / 1000 ? Looks good on paper but I see some people complaining about their reliability especially for the shorter ones. It needs to work for at least a few months without problems.
  • Rainbird HE-VAN : looks tried and tested but the wind resistance is probably lacking ?
  • a dripline like the rainbird XFD. That would be a lot of hoses though..

Even though it's not optimal, I would like to keep the heads against the wall only. Water is clean. Soil is sandy.

Thanks a lot !

https://preview.redd.it/pbt1lcnh79qc1.jpg?width=2652&format=pjpg&auto=webp&s=68995307bf81a0bda6901a2b454cdd660e97ae03

2 Comments
2024/03/24
09:48 UTC

1

Controller upgraded, now master valve won’t open?

Switched out my old hunter x-core controller for the hunter Hydrawise Pro-C controller. Once all the wiring was done and controller was set, I tried testing the zones but they wouldn’t run. I checked a few valves and they would click which indicates the solenoids are operating, so wiring was fine. I realized that the master valve wouldn’t open so although the zones were “running”, there was no water flow. Am I missing something? The master valve was working right before I switched controllers, now it’s not opening via controller. Has anyone experienced this? Please help!

5 Comments
2024/03/24
06:30 UTC

1

Double check (?) backflow preventer valve has rusted shutoff valves

Had a water leak at one of the zone valves and could not shut off the main sprinkler valve because shutoff valve 2 has rusted handle and cannot be turned off while shutoff valve 1 has the on/off handle missing. The valve stem on shutoff valve 1 seems to have its threads intact while 2 is completely rusted. Do I have to replace the whole double check valve or can I replace the shutoff valves at either end? Thanks for your help. Be gentle, I am not a pro but can fix things with some help. Thanks

https://preview.redd.it/284vjwnd28qc1.jpg?width=4000&format=pjpg&auto=webp&s=2edc1654c3fbcce7dffdbb71038ac0cb55a485ad

0 Comments
2024/03/24
05:56 UTC

1

Need advice on sprinkler run

I’m putting in a small yard, 15’x22’. 7.5GPM flow rate. Will 4 90 degree sprinklers in the 4 corners be sufficient or do I need 180 degree sprinklers half way on the 22’ run? I’m also trying to assess if it can be 1 zone or if I need to split it.

13 Comments
2024/03/23
23:56 UTC

2

Rainbird low pressure filter leaking

I have a 3 zone irrigation system that is probably 20 years old and is having some issues.

  • Zone 1 works without issue
  • Zone 2 stopped working late last season. Today I diagnosed that as a bad solenoid which is an easy fix. Good to go there.
  • Zone 3 is leaking around the filter threads pictured at the top right of the photo. I don’t believe it’s always done this, I first noticed it a couple of years ago and cleaning it did not fix the issue. Lubing the O ring did not fix the issue and the O ring seems undamaged. So I simply turned off that valve and zone as it just waters my hanging plants on my porch. But I would like to repair it.

I don’t have a spare on hand to test with. The filter doesn’t appear to be clogged. Some other related posts suggest too-high of pressure. Unless this specific valve is a low-pressure I’m not aware of any pressure regulation on the irrigation system. If it is a low pressure valve I need to learn how to verify and adjust the pressure.

I’ll dig away some of the dirt that’s accumulated in the sunken box to ID the valve. It’s a city feed into a backflow then straight to the valves as far as I know.

Thoughts?

4 Comments
2024/03/23
23:28 UTC

0

Rain Bird ESP-TM2 : Does manual mode water daily? Why does zone 1 show 6 minutes on it every time I go to it?

I cant get it to show zero, when I do a time with the other zones they go to zero and stay that way, why not zone 1?

2 Comments
2024/03/23
22:03 UTC

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