SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

After pump installed, had Rainbird, Toro, and Orbit 'recommend' a system. The plans helped me with the rotors coverage, but have concern about the pop-up coverage along the street and narrow side of house. Each developed a two circuits on the sidewalk to street section (8' wide front street section and 9' wide side street and 300 feet long) and used overlapping semicircles with heads along sidwalk and street. Toro got really creative on the 9' wide section, and almost what I was thinking, using twin 4x30's placed a few feet apart, then repeated 15' later for that 140' run.

I was thinking using 9x15 Rainbird or 9x18 Toro rectangular pattern side strip. Not only would it decrease the # of heads and piping, it would take all the heads off the street, placing them along the sidewalk spraying towards the street. I e-mailed Toro asking about it and their reply was to keep it as drawn, aluding to a coverage issue if I used 9x18' placed 9' apart.

I guess my question is: 1) is there a coverage issue with overlapping 9' rectangular pattern where the overlapping semicircle is better? Did Toro not want to admit that there was a more efficient and cheaper way than drawn?

Additionally, Rainbird makes a 15x15 square pattern. Any problen using that down the left property line that is 15 ft to house/driveway in lieu of the half circles down both the property line and house/driveway?

Thanks.

Thanks, I was afraid of that. Don't look forward to putting appox 30 heads along the street to become road kill. There is no raised curb, just a concrete edgeing to the asphalt, coupled with that property line bowing out for road curvature - but cars go straight beating down the grass at the edge. Would have been sweet if the 9x18 performed to standard.

The 10H's actually makes sense. I don't care if there is a little water on the street, rolling back to edge - particurally when it is unmetered well water.

Got graph paper and compass out and drew to scale to see what the model would look like. Compared 10' head to head spacing with the suggested 8' and 9' spacing. With 10' spacing, the overlapping arcs on the 9' wide section intersected right at the curb. On the narrower 8' section, the same overlapping arcs/curb occured with 11' spacing, but keep 10' for head to head and the added benefit of not having to cut/extend PVC for the extra foot.

The advantage of the 8 and 9 spacing as suggested, despite a little more on the road, there is is a smaller area of single spray beyond the two arcs and creates a triple spray area near the head. PVC pipe isn't really an issue, as I plan to buy 20' PVC with the flared end. Cut to length and have at most 1 joining section between heads with the flared end providing less friction than the standard joining of 10' PVC.

Also, the 10H's supports more heads per circuit with 0.71GPM vs. 9x18's (also spaced 9' apart) with 1.20GPM at 30PSI.