Peter Gallagher is professor of plant and environmental science, teaching for over 35 years. He has a Ph.D. in landscape horticulture.

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How To: Change a Sprinkler Nozzle (Part 1)
by Peter Gallagher       #How to   #Irrigation   #Video

How To: Change a Sprinkler Nozzle (Part 1)
 - Video Transcript, Demonstration by Peter Gallagher

Alright, now once we have installed an irrigation system – especially a turf irrigation system, we have to look at adjusting it and getting it to work correctly.  

The items that we will be using for today's project include an assortment of nozzles, and then the tool for the appropriate nozzle, and then finally there's a collar. You can find these tools at a local dealership that specializes in irrigation equipment or at someplace like Lowe's or Home Depot.

For example, this particular head is a Weathermatic Turbo head, and this is the tool that one would use with that. And, it's specific to that type of head. So, you have to know that. What happens is, uh, this end here is used for lifting it out of the body. And, you can see what it looks like when it's pulled up like that, and then you can drop it back down again. Or, there is this little collar, and that works for some of these as well. Not for all of them, but for this one it does work quite nicely. That collar can be placed in here, and the neat thing about it is it holds this in the open position so you can work with it.

These nozzles are numbered from 1 in this case to 13. Thirteen is a very large nozzle. But the nozzles, the smaller the number the smaller the nozzle. And for the most part, what happens is that the numbers are pretty closely aligned to the number of gallons per minute that come out of the nozzle. So, a small nozzle like 1 will let about 1-gallon per minute come out. And another one maybe a 5 will be about 5 gallons per minute. And, the 13 would be thirteen gallons per minute, for example. What we typically try to do is use a larger nozzle on a head that is set to go like 360 degrees or 270 and a smaller nozzle for those that are set to go only about 45 degrees. So, uh, we want the precipitation rates to match. So, in order to match the precipitation rates, we would have to go, for example, a number 1 on a 90 degree, a number 2 on a 180 degree, number 3 on a 270 degree, and a number 4 on a 360 degree nozzle.

Okay, so let's say that I take one of these nozzles. Choosing the appropriate size for the condition. And, I will be placing it into the head, uh, It has to be pushed in so that these tabs are at the top or these wings are at the top like that. And then it gets pushed in just as far as you can. And it, uh, probably I got it just about as far as it can go, but I want to just make sure because if it's not in all the way, then it's hard to get the screw to go down and it's not going to stay in properly.

Okay. So, I've got it down. It's at an angle. It isn't just straight across. It's at an angle, so that water will squirt upward. Okay. Now I take this tool. So, I turn this it's engaging that screw and putting it down into the nozzle. If you look at it, you may be able to see the screw is actually down here, and it's holding that nozzle in and keeping it from coming up. That same screw can go down a little further and it can block some of the water and spread it out a little bit, but normally we want it to be just above where that hole is for the nozzle. So, then I can take that out and then the nozzle is set and ready to go. Okay, so then I'll take this out.

So, that's the way we adjust the irrigation heads. I'm Peter Gallagher with State-by-State Gardening.


Posted: 10/30/15   RSS | Print


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