City Water Pressure/Flow Test Kit

Part Number # 336340

Chemical management made simpler, neater, cleaner and safer - Lafferty. In addition to supplying spare parts for all Lafferty equipment, Lafferty offers many convenient accessories to complement its wide range of chemical application equipment.

City Water Pressure / Flow Test Kit

  • Connects to a standard male garden hose fitting
  • Quickly confirms available water pressure and flow rate
  • Use to determine equipment needed for existing setup or a new facility
  • Can be mounted in-line with installed equipment to read operational water pressure
  • Useful for selecting metering tips based on the available pressure
  • Troubleshoot existing setup; see if and when the water pressure fluctuates
  • Includes three flow restrictors for testing to see if enough water volume and pressure are available
  • Includes a blank (undrilled) plug the user can modify to simulate other flow rates


  • Select the flow restrictor most similar to the flow rate of the unit being installed
  • Thread the flow restrictor into the discharge side of the gauge assembly
  • Install the gauge on the water line as close to the unit installation point as possible
  • Read the gauge only when water is flowing.
    • This is the "dynamic" water pressure, which is specified in unit requirements and used for metering tip selection
    • Reading the gauge without water flowing will display the "static" water pressure, which is not a useful measurement for metering tip selection
  • A flow restrictor is not required for installation in-line before the actual equipment
    • Unscrew the flow restrictor plug adapter from the discharge side of the gauge assembly to reveal male garden hose threads

Metering Tip Calculator available at

Other Popular Lafferty Accessories

  • Stainless Steel Chemical Jug Racks (#224195 - #224216)
  • Stainless Steel Hose Racks (#224140 - #224150)
  • Polypropylene Drum & Tote Sticks (#491643 - #491654)
  • Jug Lid (1&5 Gallon) with Suction Tube (#709101)
  • Metering Tip Driver (#443790)
Water Pressure (Max) 160 PSI

Water Flow Rate @ 40 PSI
Install to Simulate Unit Flow Rate

Small Restrictor 1 GPM
Medium Restrictor 4 GPM
Large Restrictor 9 GPM
No Hole To simulate static water pressure without any flow
Lafferty Equipment Manufacturing, Inc.
5614 Oak Grove Road
North Little Rock, AR 72118
TFN: 1-800-999-2820

Comments and/or questions about this website should be addressed to