Return to the Landscape Design Forum | Post a Follow-Up

Help with mixed use low pressure system

Posted by filetree 6 (My Page) on
Thu, Aug 23, 12 at 3:43

This is a drawing of my backyard. I hope to explain everything in enough detail so I can get some solid info.

Kennewick, WA
Weather data:
88 psi (this year) from the irrigation main. Generally, it's right around 85 psi.

Under the 11" tall, 8 sq ft. raised beds is pea gravel (1/4" round rock), and under/around the trees is hemlock bark mulch. The valve box in the corner spits out two 1" PVC lines running along the property lines on three sides.

Along the bottom is what I call "The Island". It's surrounded by grass, house, patio, and path. I currently irrigate TI by turning on the hose bib. Out of the HB, the city water goes straight down (through a 25 psi reducer and a fancy union fitting) to buried 3/4" PVC lines that come back out of the dirt and feed flexible poly tubing, and finally to 1/4" drip line. They pop up in about eight locations. Based on the plants water needs, there is either an open 1/4" tube, a shrubbler, or a microsprayer. All plants are well irrigated, but we chose more drought resistance species. That section runs five minutes per day at most.

The raised beds all have drought resistance species and only shrubblers. Every two beds are fed from a threaded PVC saddle connected to the 1" main line, 25 psi pressure reducer, and poly pipe into 1/4" drip line. Most have three shrubblers. They are running at nearly no flow, and are set to run fifteen minutes, three times a day. Healthy plants in there.

The trees are also set to run fifteen minutes, three times a day. They each have their own saddle, 25 psi pressure reducer, and short poly pipe into 1/4" drip line. All six trees have "tree stakes" at the root system. 12-20" long PVC stakes that have 2gph shrubblers stuffed down to the bottom running wide open. Each tree also has a wide open shrubbler at the root base.

Finally, the questions!

What is a good way to start irrigating The Island using the irrigation water based on how the timer is currently set? I was thinking that anything in TI would need to be REALLY set to almost no flow, based on how it's irrigated now. Or do I add more lines to the trees and adjust the time down?
Switch to super low output microsprayers for TI?

Follow-Up Postings:

RE: Help with mixed use low pressure system

Seems like your thread is misplaced and should be on the IRRIGATION forum instead of LANDSCAPE DESIGN.

RE: Help with mixed use low pressure system

Hopefully it can be deleted. Apologies...

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Landscape Design Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here