Sprinkler System Design - How Many Heads on a Line?
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- Опубліковано 30 січ 2020
- “How many heads can you put on a line?” This is one of the most common questions we receive in the irrigation industry. Unfortunately there's not a simple answer. Doug Donahue from Ewing Irrigation & Landscape Supply explains in this video.
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Ewing Outdoor Supply is the largest family-owned supplier of landscape and water management products in the country. As your business partner, we offer products and education for irrigation and landscape, turf and land management, outdoor living, sports fields, golf and sustainable solutions. Our nationwide network of friendly, knowledgeable staff helps green industry professionals discover products and services for business success.
I'm upgrading the sprinkler system on the house we just bought and it's been a nightmare. The previous homeowner had everything hooked up to a hose bib and used 1/2" poly pipe as their lateral lines. Their zones have anywhere between 1 head and 5, so I get totally different performance out of the heads (all the same model) depending on which zone is pressurized. I think eventually I'm just going to dig it all up and build it properly...
Thanks I enjoyed it
very well explained
Thanks for watching and for the comment!
Great video
Thanks!
My sprinklers are not on the same water line as the house and hose bibs around it. How do I measure the pressure then?
Is there a formula of how much the pressure decreases for each sprinkler head? Does using a specific sprinkler head reduce water pressure more than other? (ie rotors, rotary nozzles, spray nozzles, impact sprinkler heads…).
Does too many sprinkler heads reduce the pressure just mostly at the end or even the first sprinkler head?
And what type of sprinkler head still works ok at very low PSI? (I bought a house with a full system set up over 1/2 acre. At the bottom of the hill I tried to test the PSI and I think it’s like 10. ). There are 14 Rainbird R Vans and even a drip line to this section.
Oh, and does having all the sprinklers in a row off the same line effect pressure any differently than having the main line branch 2 separate directions with the heads off 2 different branches?
Thanks.
40psi 4 heads rotor or mist 1" line from 1.5 to 3.0 nozz on hunter pgp
8van to 15van on the rain bird 1800 series, this works for me
50 psi 5 heads and so on,
Baccum breaker backflow
And i just open a hose bib in full i take a look on how much water comes out, and thats it, im ready to do the installation 😃
God bless heal and save you
Question
I have 100 psi for my water. How many rainbird 42SA+ head can I installed on a single line?
Probably like 20-23 half heads. I think that's too much pressure. You should reduce it to at least 85 pounds. And work from there
How do these jets get full coverage? For example if you set to spray out 10 feet distance... then how does it cover all of the area of the grass from zero to ten feet? Does each individual stream throw a difference distance to cover all of the area as it rotates? Thanks for the help.
The MP Rotator nozzle streams have varying angles to cover the area from the head to the outer radius. This combined with head-to-head spacing ensures that you have coverage over the entire turf area. This video will give you a better idea. ua-cam.com/video/nmsZtby1iOw/v-deo.html&ab_channel=HunterIndustriesResCom%2CandGolfIrrigation
Thanks for the question!
Thank you so much for the quick reply this helps a lot. I see there a rotator heads available to purchase. What type of base do we buy to screw on the rotator head to.
Any standard pop-up body will work. Be aware that there are both male and female threaded MP Rotators so purchase the correct option for the pop-up body you use. This option is the recommended body for MP Rotator nozzles: www.ewingirrigation.com/44012040-pro-spray-4-inch-pop-up-with-prs40-and-cv . There are other heights available as well.
Thank you really appreciate it
What is the rule for 40degree slope area in vertical line sprinklers at a distance of 25feet. Each line has 10 sprinklers .thee water force is 3hp pump with 2.5inch main pipe. Please know how should be telescopic system. This is for arecca
If your irrigation system is feeding the lines downhill (7%-10% grade) does the pressure increase to any degree due to the momentum increase in running downhill??
Correct, for every 10 feet of fall in elevation, you will gain +4.33 psi.
Yes so if your zone is on a hill, you must zig zag your underground lines to slow down the water as opposed to installing it straight up and down, so that the heads at the top still have pressure. Made this mistake once... never again🤦
Cool story. 1 example would have been nice
Yeah this is good information but most people really don't need to know all of this. Using an 1800 sprinkler head I find about 4-6 heads per zone is the sweet spot. Normally I do 5 for a home with average pressure.
Would it affect or damage the system if I only have one or two sprinkler heads for one zone or valve?
As long as your pressure doesn't exceed product specifications you should be fine. Thanks for the question!
@@ewingoutdoorsupply thanks! I'd like to buy products from you guys, do you help guiding through the installation process and designing?
There's quite a bit to know about installing an irrigation system so our branch staff might not have the bandwidth to help with design and training. That said, we do have some training resourses online that you can refer to (link below). Our primary customers are landscape contractors so we can also provide referrals if you decide to hire someone.
www.ewingirrigation.com/education-past-webinars
I need a book like u have there
Google, there's nozzle flow charts for every head, by every manufacturer. You have to know this info to be able to use their product.
wow 90psi!
right, wtf lol
Do you have this clases in Spanish?
We have a variety of webinars that are available in Spanish. You can see previous webinars as well as enroll for upcoming live webinars here:
store.ewingirrigation.com/education-past-webinars
Where can I get that catalog??
You should be able to pick one up at your local Ewing branch or you can download a digital copy here:
www.hunterindustries.com/sites/default/files/hunter_catalog_dom.pdf
Thanks for watching!
What "this particular rotor"?!
What "this particular nosel"?!
The most difficult task is to get out of ones own head
FOMO or fear of missing out is what you are referring to?
install a sprinkler pressure pump, use at least 1" pipe, problem solved. no more Einstein tinkering.
Yes I grew up working with the Parks Department we kept downsizing the pipe for pressure does a contractor myself the run the largest diameter right and to the heads and use the nozzles to keep the pressure up it might take a little longer to load but I want as much water out there as I can get
You also need to take into account elevation.
I thought the "bucket test" was outdated and extremely unreliable.
No answer provided.
Hydraulics = FLUID in motion
Fill in the variables and give us an example 😩
Q: how many sprinklers can you put on a line?
A: it varies and you have to do math... in other words call a pro.
Lol
Can no one give even one example of how many heads per line. Come on, 1 is normal, 30 is normal or is 200 normal for a house? Give a guy a bone. I would say anyone who has put in sprinklers for a couple weeks could tell you how many they normal can put on one zone. You could say 30 psi with 35 rotors sprinklers is normal or something! Maybe 3 examples would be very helpful for sure.
I’ve given up trying to work out all this. So I just worked out how many litres/gallons per minute flow from my tap, reduced it by 20% and that is my measurement. I’m going 3/4 inch pipe as it’s the most common for lawns so I just stuck with that and I’m buying my supplies. I’ll install it all in the coming months.
ua-cam.com/video/eEfyFiOUeUA/v-deo.html. I used this video, followed it exactly, and my system is working fantastic
1 isn't Normal. 30 isn't normal. 1, however, is more normal than 30. Hope that helps.
So still did not say how many 😂😂😂😂😂😂
Lol Fr
Because there are way too many variables to give a definitive answer. There are different manufacturers, sprinkler head types, water pressure variables, pipe fittings and diameters, altitude, etc. With this many variables, you can't realistically give an answer. What this guy does is give us a formula that would allow us to make a calculation of our needs based on the variables unique to us.