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ophedian

New Member

1

Saturday, May 19th 2007, 10:26am

60 x 60 yard design approval

hey All, I need my thinking processes looked over. First the info:
* Front Yard Size: 60' x 60' feet square.
* Grass Type: Bermuda mowed at approximately 1' height.
* Yard faces: South/south east: Full sun from morning to night: No trees so it needs a lot of water.
* Water Static Pressure: 80psi at 3/4" main tap off.
* Water Pressure measured through 3/4" pipe after back-flow preventer: 55psi at 14gph flow rate or 45psi at 16gph flow rate:

I am planning on using RainBird rain curtain 5000 series sprinklers on the yard. When I drew the layout I ended up with 8 sprinklers around the border of the yard and 1 sprinkler in the middle: Total 9 sprinklers. I am going to use a 1' main to valves then 3/4" laterals with 3/4" to sprinkler heads: sch 40pvc for all runs.

Planned Zone division:

<b>Zone 1:</b>
5 border sprinklers at 45psi with 2.0gph nozzles: 10gph

<b>Zone 2:</b>
3 border sprinklers at 45psi with 2.0gph nozzles: 6gph
1 center sprinkler at 45psi with 4.0gph nozzle: 4gph
Zone 2 total Gallons per hour: 10gph:

This shall give me approximately 4 gallons at 45psi in each zone for future improvements and also for the occasion water pressure drop in the local water system [:)]

How does that sound as it is taking a miracle for wife to let me do this, so I want to get it right. I do not want to lose WAF for this project and ALL future projects. [:)]

Thanks for your help...

Tom

Supreme Member

2

Saturday, May 19th 2007, 11:43am

seems like your going to use the 2.0 nozzle for both corner rotors and half circle rotors- DON'T!

you need corner-1.0 gpm
half-2.0 gpm
full-4.0 gpm

Or, nozzles that are fairly close to this ratio.

But, since your using the rainbird 5000 heads, get the MPR color coded nozzles. The green ones will give you the exact 30' you need with matched precipitation.


And, just use 1" pipe for the whole system







ophedian

New Member

3

Saturday, May 19th 2007, 4:42pm

Since these are rain curtain nozzles, using 1gph nozzles, will the water drops still be enough to nicely create the rain curtain effect? I have also noticed that these units come factory shipped with 3gph nozzles. Is that their optimum flow rate in order to get the proper rain curtain effect?

To make sure of the coverage, I tested one sprinkler unit running at 55psi with a 5gph flow rate and the rain curtain was so nice that the neighbor next door asked "which sprinkler was that?" as his does not have a Rain Curtain effect. I was using a 42SA RainBird from home depot to test the throw distance. Since this is a lower model line product, am I to assume that the 5000 series would even do a better?

Wet_Boots

Supreme Member

Posts: 3,880

Location: Metro NYC

4

Saturday, May 19th 2007, 5:28pm

'Rain Curtain' is a nice look, but the objective is watering the grass, and not pleasing your eye. Rainbird 5000 series would work, and so would Hunter PGP rotors. By the way, "gph" means gallons per hour. With the water supply you describe, no problem with two zones of rotors.

Jef

Active Member

5

Monday, May 21st 2007, 2:41pm

gpm (per minute, not hour)

jmduke7

Advanced Member

Posts: 158

Location: FT. Walton Beach, Florida

6

Monday, May 21st 2007, 2:52pm

Do as Tom specified. Match your precipitation rates! It is a must, especially if you want to do it right!
Josh
Irrigation /Landscape Lighting / Pump and Well Specialist

ophedian

New Member

7

Thursday, June 7th 2007, 7:52am

Okay, i have a 4ft wide sidewalk which disects my lawn into the large section above 60ft x 60ft and a small strip of approximately 2ft x 60ft. I would like to put this strip on its own zone instead of putting the big rotors in the strip and have them fire across the sidewalk into the rest of the yard. The problem is that I cannot find anyone that has 2ft strip sprays[End Strip, and center strips]. I have checked the usual suspects... Rainbird, Hunter... they all offer either 4ft or 5ft as the smallest strip noozles. I checked out Toro at the link below, they talk about 2ft wide strips but I cannot find them anyway on the net. At the below link, in the additional features, it mentions 2ft x 6ft strips. Any idea what their SKU # is so I can order them or if you know of where I can get these strips that would be great.

Thanks for all of your help... i am installing everything starting the weekend of June 12th.

Toro Link at SprinklerWarehouse.com
http://www.sprinklerwarehouse.com/Toro-Rectangular-Center-Stripe-MPR-Plus-Nozzle-p/4-est-toro.htm

Wet_Boots

Supreme Member

Posts: 3,880

Location: Metro NYC

8

Thursday, June 7th 2007, 12:10pm

Toro 2x6 side strip nozzles are a pain to use. They require a supplemental metal screen to keep the nozzle from clogging. Narrow strip heads are a relic of the brass nozzle days. One might just use turned-down center strip heads. (which would still overspray the sides a bit)

Tom

Supreme Member

9

Thursday, June 7th 2007, 2:36pm

I'd eliminate a strip thats 2' x 60'- just doesn't make sense to water such a narrow area.

Can the sidewalk be enlarged that extra 2' width, or can you remove the grass and install decorative rock?

ophedian

New Member

10

Thursday, June 7th 2007, 8:05pm

The actual size of the strip is 2' by 148' if you count all the way across the front yard. I was only going to do the 2' x 60' that is on the front left of the yard first then the other side of the yard later on in the year.

The neighbors who had sprinkler systems installed have the rotors installed in this 2' strip and firing across the 4' sidewalk and into their yards.

Since it appears that the strip sprinklers are not going to work, how about some solution that perhaps can use some type of drip irrigation sprinkler, spray, bubbler, etc. The option of doing some type of hard scape is a last last result as I am sure my wife would not go for it.

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