Drive Over Foam Unit


Motion activated foam system that effectively applies product to the underbody of vehicles. Powered by compressed air and electricity and works with trucks and passenger vehicles.



  • applies foaming product to vehicle underbody
  • works with trucks and passenger vehicles
    • vehicle ground clearance: 7-49 in. (17.8-124.5 cm)
    • vehicle weight: up to 40,000 lbs (18.14 metric tons) per axle
  • sensor-operated system starts when vehicles approach – no need for an attendant
  • foam provides long contact times for maximum chemical effectiveness, and a visual way to verify coverage
  • easy to install
  • draws from concentrated product (includes proportioning tank)
  • dilutes at ratios of 4:1 to 530:1 (water:chemical)
  • powered by compressed air and electricity
  • low-pressure system
  • includes water separator to protect pumps


Drive Over Foam Unit

Operation Manual

Drive Over Foam Unit

power type

compressed air and electricity

chemical pickup type

draws from concentrated product (includes proportioning tank)

dilution ratio range (water:chemical)

4:1 to 530:1
NOTE: approximate dilutions at 40 psi (2.6 bar) water pressure for water-thin products at 1.0 cP.

number of products unit can draw from

one product

suction line length/diameter

from proportioning tank to chemical source: one suction line, 9 ft. (2.7 m) of clear hose with 1/2 in. (12.7 mm) inside diameter
from pump box to proportioning tank: six suction lines, each 10 ft. (3.1 m) of blue hose with 3/8 in. (9.5 mm) inside diameter


proportioning tank: 55 gallons (208.2 liters)

flow rate

13 gal/min (49.2 l/min)
NOTE: flow rate based on chemical with viscosity of water and factory air settings.

pump seals

Santoprene, Viton, or Kalrez

number of nozzles

includes five ramp nozzle assemblies and two side nozzle assemblies

distance from nozzles to control panel

minimum: 30 ft. (9.1 m)
maximum: approximately 50 ft. (15.2 m)

tubing/fitting sizes

designed for use with 1/2 in. (12.7 mm) inside diameter hose between control panel and nozzles

vehicle ground clearance

7-49 in. (17.8-124.5 cm)

coverage area

with 7 in. (17.8 cm) vehicle ground clearance, coverage area will be up to 65 in. (165.1 cm) wide
with 49 in. (124.5 cm) vehicle ground clearance, coverage area will be up to 102 in. (259.1 cm) wide

vehicle weight

up to 40,000 pounds (18.14 metric tons) per axle

ramp width

12 ft. (3.6 m)

traffic flow direction

suitable for traffic moving in one or both directions

sensor type

detects moving iron-based metal

compressed air requirements

50 psi (3.4 bar) with 20 cfm (566.3 l/min)

water requirements

25-100 psi (1.7-6.9 bar)
backflow prevention is required – consult local plumbing ordinances for more information

liquid temperature range

40-100˚F (4.4-37˚C)

electrical requirements

120 VAC at 60 Hz, 2 amps (GFCI protected outlet)

operating voltage

120 VAC

chemical compatibility

Chemical products used with this equipment must be formulated for this type of application and compatible with unit materials and pump seals. For more information on chemical compatibility, consult the manufacturer or SDS for your product or contact our customer service department.

FI-DOF Santoprene (standard)
Viton (V)
Kalrez (K)


Add option codes to item number as shown. For standard options, no option code is needed. Examples:

  • FI-DOF (standard unit with Santoprene pump seals)
  • FI-DOFV (unit with Viton pump seals)
  • 55 gallon (208.2 liter) proportioning tank
  • control panel assembly
  • ramp (in 4 sections)
  • 5 ramp nozzle assemblies
  • 2 side nozzle assemblies
  • sensor
  • 230 ft. (70.1 m) of 1/2 in. (12.7 mm) inside diameter blue hose
  • control panel mounting hardware
  • user manual

Support Videos

How to adjust the wet/dry foam needle valve

Cómo ajustar la válvula de la aguja de la espuma húmeda o seca


Which pump seal material should I choose?

Pump Seal Material Compatibility

Choose a pump seal material that is compatible with the chemicals you will use. Chemical incompatibility can cause accelerated wear and equipment failure that is not covered by warranty, so it’s important to do your research.

  • Consult the safety data sheet (SDS) for your chemical to learn about the ingredients.
  • Use a chemical compatibility database (like this one: to look up the ingredients and find material compatibility info.
  • Note that the concentration of chemicals makes a big difference in compatibility. Think about whether the chemical you use will be in a pre-diluted or concentrated form when it is used in the equipment.
  • If you need help, ask your chemical manufacturer. Or, send your SDS to and we can help.

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