PRIVATE WATER SYSTEMS - Pumping Installation - Lawn

Pumping Installation - Lawn

 
Peak Demand Allowance (gpm) Individual Fixture Flow Rate (gpm)
Lawn irrigation 2.5 (5.0)
Garden irrigation 2.5 (5.0)
Automobile Washing 2.5 (5.0)
Tractor and equipment washing 2.5 (5.0)
Flushing driveways and walkways 5.0 (10.0)
Cleaning milking equipment and milk storage tank 4.0 (8.0)
Hose cleaning barn floors, ramps, etc. 5.0 (10.0)
Swimming pool (initial filling) 2.5 (5.0)

  1. List all of the lawn, gardening, and miscellaneous uses and the water demand for each. Make a note of the use with the highest PDA and its FFR.
    EXAMPLE: Given a residence on small acreage with a lawn, garden, and swimming pool.
     
    gpm
    Lawn irrigation (1 sprinkler) 2.5
    Garden irrigation (1 sprinkler) 2.5
    Car washing 2.5
    Swimming Pool (initial filling) 2.5
    Cleaning milk equipment and milk storage tank 4.0
    Hose-cleaning milking room 5.0
    Hose-cleaning hog house 5.0
    Hose-Cleaning poultry house 5.0
  2. Determine which uses are competing;

    - Competing uses are those sustained uses which occur simultaneously. This step involves deciding which uses will overlap. Two options to consider are the number of self-operating units (i.e. sprinklers), and the number of people that will be available to operate a hose. For the purpose of this example, suppose it was decided that only one sprinkler would be used at a time, and no more than two family members will be using cleaning units at any on time - one of these being car washing. This would leave the following competing uses:

    Lawn or Garden watering
    (1 sprinkler)
    Car washing
    (1 person)
    Heaviest hose-cleaning use
    (The other person)

    The rest of the uses are non-competing. Do not include them as part of the demand on the pump.

  3. Determine the demand allowance for the pump by totaling the demands for the competing uses. For this example, the demand on the pump is 10.0 gpm.

    If irrigation, cleaning, and miscellaneous uses are all the pump will serve, or if they are to be combined with household uses, skip the table for farm water uses and proceed.

    * For items not listed, such as iron-removal filters, cow- washing systems, milk processing equipment, liquid feeding equipment, etc. determine water demand from the manufacturer''s equipment specifications. Use 50% of that figure in your listing as "Demand on Pump".

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