Fixing A "professionally Installed" Irrigation System - Landscaping & Lawn Care - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Landscaping & Lawn Care


Thread Tools Display Modes
Old 03-20-2012, 12:58 PM   #1
crankcase's Avatar
Join Date: Sep 2010
Location: Minnesota
Posts: 131
Rewards Points: 75

Fixing a "professionally installed" irrigation system

I had a contractor install a large irrigation system 2 years ago, so this season will be my 3rd startup. I have spent more time than I think a homeowner should have had to resetting head height, adjusting rotors, adding teflon tape to many riser pipes where they screw into the rotors because of leaks, and even moving a few rotors with a little funny pipe because they are not in a straight line. So now I just noticed that all of my rotors have 2.5GPM nozzles, no matter if they are full circle, half circle, or quarter circles. How do I correctly calculate the correct nozzle size on a zone that has a combination of rotor requirements noted above? Some zones are 5-360 degree heads, others may have 2-180's a 90 and 2-360's.

Here are some of the specs of my system which may be of some help:

He figured max GPM for sprinkler demand at 12.5GPM, that was supposed to give me capacity to run the shower or some water usage in the house if the sprinkler is on.
All rotors are 2.5GPM nozzles. Hunter PGP rotors
Rotor to rotor coverage, max spacing is 40-45'
15 zones @ 5 rotors per zone.
1 zone @ 3 rotors per zone.
1 zone with 10 or 12 microspray misters. (1/4" push on tubing)I think they are Rainbird.
1 1/4" main line
1" line for everything else.
1" valves
Blazing saddle Tee's
Oh and I know that he mentioned that when he pulled the pipe that feeds a lateral where the heads are (If that's the correct term) he fed it to a "T" and not into the end of the run so that the head on the far end wouldn't suffer from a pressure drop.


crankcase is offline   Reply With Quote
Old 03-20-2012, 01:22 PM   #2
Join Date: Nov 2011
Location: Hartfield VA
Posts: 34,419
Rewards Points: 13,968

There's tons of on line design tools. I just Google "lawn sprinkler system design and hundreds came up. Here's one.


joecaption is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Leaking Irrigation System daveclt Landscaping & Lawn Care 0 10-09-2011 02:29 PM
Well pressure boost for lawn irrigation system. wernerp Plumbing 8 08-22-2011 10:33 PM
Whoa, how much water can my irrigation system use??? J187 Landscaping & Lawn Care 19 11-10-2008 03:04 PM
Using my gutters as an irrigation system for landscape beds? joeyboy Landscaping & Lawn Care 7 07-29-2007 10:13 AM
Size A/C system properly 70stang HVAC 1 03-26-2006 07:22 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1