Pressure Regulator For Blowouts

Discussion in 'Irrigation' started by White Gardens, Oct 10, 2012.

  1. White Gardens

    White Gardens LawnSite Fanatic
    Messages: 6,776


    So, unfortunately the rental house I was going to get a 90 cfm compressor from doesn't have one in the area.

    All the other houses have basically the same compressor. 185cfm and about 125 psi.

    So, needless to say I have to use it regardless.

    So, I need to regulate the pressure. I guess I can just crack the valve half way and figure I'm getting low enough PSI for the irrigation systems.

    But that's not good enough for me. I'd like to know the exact PSI I'm pushing through.

    So, I was thinking of a simple Pressure Regulator you can buy for standard air compressor, adding two male quick connects on each side and run it in-line with my air hose.

    Do you guys think this is a viable solution, or would I just be wasting my time. The regulator is only like 10 bucks total, and that's cheap for a bit of piece of mind.




  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,759

    Spend more money for a 3/4-inch or 1-inch brass regulator that is specifically rated for high-temperature use, meaning at least 300ºF
  3. S.O.Contracting

    S.O.Contracting LawnSite Member
    Messages: 186

    All the diesel tow behind compressors I've used have had a built in regulator and gauge. You just gotta find it.
  4. White Gardens

    White Gardens LawnSite Fanatic
    Messages: 6,776

    Thanks, that's a better idea by far.

    See, that's what I would assume with any tow behind unit. Everyone I called though (4 shops total) said there is no way to control the pressure, and I don't buy it.

    I might call the rental house tomorrow and get the specific make and model and try to find a manual for it on-line and figure it out.

  5. irritation

    irritation LawnSite Gold Member
    Messages: 3,594

    Yea, it's there. They just don't want you messing with it.
  6. Mdirrigation

    Mdirrigation LawnSite Gold Member
    Messages: 3,794

    They all have pressure regulators its just knowing what to look for , then knowing how to adjust them .
  7. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,759

  8. cjohn2000

    cjohn2000 LawnSite Senior Member
    Messages: 570

    What weve always done is use a ball valve on the end of the hose with a pressure gauge down stream of it. Not perfect because the air pressure can build so the trick is to either switch the valves fast or manually open a second one and close the first.
  9. biodale

    biodale LawnSite Member
    Messages: 184

    The compressor will probably surge if your adjust the pressure regular on the compressor down to 50 psi. I use an external pressure regulator mounted by the reel.

    Slowly opening the ball valve is not a good way to regulate the air pressure. It is too easy to open faster than you intend and create a water hammer that will send a sprinkler head into space.

    I get a lot of sprinkler repair in the spring because of unregulated air.
  10. AI Inc

    AI Inc LawnSite Fanatic
    Messages: 27,060

    what he said. Like all it will have a lock nut and a bolt that screws down to increase , up to decrease.

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