3-Bar Truck Foam Arch

Model # 910930

The 3-Bar Truck Foam Arch is a drive-through foam applicator for washing large vehicles and features 3 foam bar assemblies mounted above and and at the sides of the vehicle for complete coverage. This venturi injection unit uses city water pressure (40 - 125 PSI) to draw and blend chemical concentrate into the water stream to create accurately diluted solutions using precision metering tips. For optimal performance, water pressure should be 50 PSI or higher. Compressed air is injected to greatly increase volume and coverage ability, creating rich, clinging foam that is projected through multiple fan nozzles on each foam bar. The foam consistency (wet/dry) can be adjusted.

Key Features
  • Dilutes chemical concentrate at the unit independently for each foam bar
  • Creates rich, clinging foam which increases chemical contact time and effectiveness
  • Foam consistency (wet/dry) is adjusted with a single air regulator
  • Chemical resistant wetted components ensure durability and years of reliable performance
  • Water and air pressure gauges eliminate guessing to reduce set-up time and help with troubleshooting
  • Available for pre-diluted chemical systems (#910910)
  • See more foam/spray bar units in Catalog 10


  • Lockable, stainless steel enclosure
  • Three machined polypropylene Arch Foamer bodies
  • Machined polypropylene water manifold and air manifold
  • Air regulator
  • Three water ball valves
  • Three sets of 20 color-coded precision metering tips to set dilution ratios
  • Three 1.5" discharge hose barbs (for connecting user-supplied hoses to the foam bars)
  • *One 8' top foam bar
  • *Two 13.6' side foam bars
*Side bar lengths and nozzle placement are factory customized at the time of order
Temperature up to 160°F
Pressure 40 - 125 PSI
Flow 7.35 GPM @ 40 PSI (total)
2.45 GPM @ 40 PSI (per bar)
Hose/Pipe 1-1/2"
Compressed Air up to 12 CFM

Side bar lengths and nozzle placement are factory customized at the time of order

Dilution Ratio Range 560:1 to 6:1 @ 40 PSI
Drum & Tote Stick Lengths, Styles & Seal Materials
Drum Stick, 33" (Viton or EPDM)# 491643 / 491643-E
Drum Stick, 48" (Viton or EPDM)# 491648 / 491648-E
Drum Stick, 54" (Viton or EPDM)# 491645 / 491645-E
Tote Stick, 33" (Viton or EPDM)# 491653 / 491653-E
Tote Stick, 48" (Viton or EPDM)# 491654 / 491654-E
Tote Stick, 54" (Viton or EPDM)# 491656 / 491656-E
Alternate Check Valve - Viton Standard
Check Valve, Chemical, PP, 1/2" HB (EPDM)# 491403
Lafferty Equipment Manufacturing, Inc.
5614 Oak Grove Road
North Little Rock, AR 72118
TFN: 1-800-999-2820

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