Drip tubing Precipitation Rate- help please!


#1

So I’ve been back and forth with customer service this week and scrolled through these forums looking for an easy way to calculate PR for my extremely long and sub-mulch drip tubing. I know the tubing has 1 gph emitters every 18 inches but my landscape is large and the tubing courses through a few hundred feet of landscape. Can anyone assist in this calculation with straight forward instructions? Love the product but the advanced settings on my drip tubing zones alludes me. Thanks !


#2

Check this out and see if it helps.


#3

Also check out the ‘IRRIGATION HARDWARE (Drip emitters)’ at the bottom of the 1st post here.


#4

azdavidr. really appreciate your input on this. The information you have provided to the forum is excellent. I definitely have evenly spaced emitters but Rachio’s calculator for this type of drip assumes the area that is being watered is 1 square foot so I am unsure how to measure the amount of water put down for one square foot over a period of time since I have hundreds of emitters. The water meter measures all of the drip emitters collectively since they are all on the same zone. I have emailed support with this question but if anyone here knows the answer please post it. Thanks again!


#5

Don’t get me started on that area=1 assumption @OrthoDoc. I just don’t see it. Anyway, did you look at that second post “Where to start on Flex Daily” and the final calculator pointed to from wsu ? It seems to cover your scenario.

I tried it for my garden which had evenly spaced emitters and wasn’t crazy about the results, but I don’t remember why. You might give it a shot if you haven’t already. What I ended up doing was that I had a good idea of how long I needed to run my garden every day. Using the GPH for the line and the runtime I wanted, I was able to calculate the total number of gallons I wanted to put out (GPH * runtime in hours). Once I had that I went back to my original calculator and used the total number of gallons to get a PR. Does that make sense ?

And thanks for the kind words!