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Any sprinkler guys? Help

Discussion in 'Homeowner Assistance Forum' started by Gators10, Apr 6, 2012.

  1. ffemt1271

    ffemt1271 LawnSite Bronze Member
    Messages: 1,285

    If i'm reading correctly, you said you have 25 psi at your well? you may have to look into intalling a higher psi set of contact points on your well. i have 40 to 60 PSI points (cut on at 40 psi & off at 60 psi) on mine and it's like having city water pressure. i would also reccomment putting a pressure gauge on your well so you can monitor the pressure on it any time you need to.

    i'm not a sprinkler expert, but i have maintained all our wells on our property for many years.
  2. Patriot Services

    Patriot Services LawnSite Fanatic
    Messages: 14,159

    Have you tinkered anymore?
    Posted via Mobile Device
  3. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    25 PSI at the pump is not enough to run anything. That is your first of many problems.
  4. Gators10

    Gators10 LawnSite Member
    Messages: 11

    I don't think it's 25 psi at the pump. I think he said it was a volume meter maybe?

    What pressure do you need for a proper working sprinkler system?
  5. Gators10

    Gators10 LawnSite Member
    Messages: 11

    I just checked and there is a gauge on the top of the sprinkler pump. It is jumping like crazywhile running between 10-20 psi. So is that my problem? The well isn't cutting it?

    Thanks guys
  6. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    Ideally you want ~ 45 PSI at your typical rotor nozzle and ~ 30 PSI at your typical spray nozzle. In terms of the pressure reading, what was running (in terms of water usage) when the pump was running? Have you audited your irrigation water usage? Collect information on each zone for sprinkler type and nozzle type, then look up the water usage in the charts for the recommended operating pressure on each nozzle. If any zone exceeds 8-10 GPM then that is your first problem, assuming the well is actually putting out 12 GPM.
  7. Gators10

    Gators10 LawnSite Member
    Messages: 11

    Wow ok. So is it safe to say I need another well. The neighbors have sprinkler systems and they kick butt and look like they are supposed to. Hell next door the guy has one that probably shoots 50 feet where my struggle to do 15.

    The only thing running at that time was the sprinkler system. One zone with 7 rotary heads. I have never audited the water usage since all the math seems quite confusing for a normal person to do, and there are 4 different type of rotary heads across that one zone (Hunter, K rain, rain bird and orbit) and most are so old you cant see anything on them to figure out what exact type they are.

    Part of me would like a second well anyway and keep using the one well we have now for the house since the pressure for that is fine. I am assuming the screen is clogged, or the well pipe has holes in it which are causing the pressure issues?
  8. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    Don't jump to conclusions

    The difference might be as simple as a properly designed system vs. yours.

    Then depending on the nozzles, you could be easily exceeding the wells capacity. Given the reported pressure reading, this is more likely the case than not.

    It's not confusing .... simple addition. The nozzles typically have a number on them.

    Personally, I wouldn't do anything until I had fully audited the irrigation system. Based on what you have said so far the system sounds like it was poorly designed and is in need of a overhaul. The poor design is also quite likely the reason for the poor performance, assuming it has always performed the same.
    Last edited: Apr 11, 2012
  9. Gators10

    Gators10 LawnSite Member
    Messages: 11

    Ok well tonight I will try to get all that info together. What is the proper way to do an audit if you dont mind me asking? And let me get this straight, a system can work with low flow, but you just have to either make more zones to spread the load, or get low flow nozzles?

    Also, wouldnt it be better to get a second well anyway so I could at least run the house pump and sprinkler pump at the same time for convenience?
  10. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    No offense, but this is something you should hire a qualified consultant to do. This is the minimum you would need to do.


    Yes, but simply swapping nozzles may not do it. It is possible you could replace the rotors with something more appropriate (like MPRotators), but that depends on how the system was designed and installed. You also have to consider your pumps BEP.

    If you have money burning a hole in your pocket then put in a second well. That however doesn't fix the problems with your irrigation system so that begs the question why. Collect the data you need to make an informed decision.

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