Well pump questions

Discussion in 'Irrigation' started by Classic Lighting, Aug 18, 2010.

  1. Classic Lighting

    Classic Lighting LawnSite Senior Member
    Messages: 510

    1. How do I determine the correct size pressure tank for a pump?

    2. What are the pros/cons for using galvanized or sch 40 or sch 80 for plumbing inlet/outlet on the pump?

    3. Pros/cons for 120 or 220 volt electrical supply?

    4. What is a "packer"? I frequently hear this term when reading about deep well pumps.

    I am trying to learn more about pumps and where the water comes from. General knowledge........ better understanding as a whole.
  2. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,401

    "packers" are for well points - they give you a pipe inside a pipe. Not very common these days.

    Pressure tanks are sized to allow a minimum time to elapse between pump starts. Pick your pressure range, and pick your minimum time between starts, and you can work out what tank fits your pump.
  3. AI Inc

    AI Inc LawnSite Fanatic
    Messages: 26,830

    If using 120 , make sure you have enough amps and a large enough wire. 1.5 hp pulls 16.6 amps.
  4. Classic Lighting

    Classic Lighting LawnSite Senior Member
    Messages: 510

    I know there has to be more than 2 replies. Come on pump experts, any more input?
  5. Wet_Boots

    Wet_Boots LawnSite Fanatic
    Messages: 50,401

    Doesn't work that way, pal. Be glad anyone replied at all. You need to hire your pump work done.
  6. Sprinkus

    Sprinkus LawnSite Silver Member
    Messages: 2,305

    1. Research proves that manufacturers, like Amtrol, have product sizing wizards.

    2. Galvanized pros: Doesn't melt, pretty hard to break off or damage.
    Galvanized cons: More expensive, needs to be cut and threaded if certain unavailable lengths are needed.

    PVC pros: Easy to cut to size, cheaper.
    PVC cons: Melts, not UV resistant, breaks easier.

    3. 120v pros: Good for smaller pumps and where 220v is not available.
    120v cons: Takes larger gauge wire, not an available option in larger pumps.

    220v pros: Use smaller gauge wire, larger pumps can be used, can run certain VFD drives to control 3 phase pump motors.
    220v cons: Not always needed, not always available.

    4. Dunno.

    5. Why do some lighting contractors use wire nuts with electrical tape on them for direct bury? Why is 95% of the lighting wire and conduit I see buried at a depth only one or two inches below grade? Why is it that lighting contractors use irrigation ditches to run their pipe?
  7. Classic Lighting

    Classic Lighting LawnSite Senior Member
    Messages: 510

    Sprink, that for the info.
    To answer your question.....1. Direct buried wire nuts with tape are frequently used by HO's, irrigators who moonlight as lighting installers, or hacks in general. It's utmost importance to ensure waterproof connections due to wicking. Connections are considered weak points of a system, no need to cut corners here.
    2. Wire is generally recommended to be installed at 6" minimum. 1-2 inch installation are usually due to laziness and short cuts. Again, HO's, moonlighters, and hacks in general.
    3. I have no idea. During installations, I don't even consider how the irrigation is installed. All I'm worried about is my install, not piggybacking on the irrigation trench. The only thing I MIGHT consider is using a irrigation sleeve. Usually it is too tight to fish wire through so I end up making a mess installing another sleeve.
  8. bavaria-n

    bavaria-n LawnSite Member
    Messages: 131

    I use pump to water the lawn only, without any pressure tank, works grate
  9. hoskm01

    hoskm01 LawnSite Fanatic
    Messages: 5,690

  10. greenmonster304

    greenmonster304 LawnSite Gold Member
    Messages: 3,655

    That is a suction grate it keeps the big chunks out of the impeller
    Posted via Mobile Device

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