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Twin-Line Concentrate Doorway Foam Unit for 2-Part Products

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  • Draws from two concentrated products simultaneously
  • Ideal for 2-part products that need to be mixed on the fly
  • Dilutes at ratios of 7:1 to 125:1 (water:chemical) for each product
  • Dilution rates can be independently controlled for each product
  • Repeat cycle timer
  • Quick-change pump
  • Supports up to 3 twin-line stainless steel nozzle assemblies
  • Up to 100 ft. (30.5 m) total distance between control box and nozzle(s) (distance does not need to be evenly distributed)
  • Consistent, reliable dilution rates, regardless of changes in water pressure

Compressed air requirements40-80 psi (3-5 bar) with 5-10 cfm (141-283 l/min)
Water requirements10-100 psi (0.7-6.9 bar)
Backflow prevention is required – consult local plumbing ordinances for more information.
Liquid temperature range40-100˚F (4.4-37˚C)
Electrical requirements120 VAC at 60 Hz, 2 amps (GFCI protected outlet)
Operating voltage120 VAC
Chemical compatibilityChemical 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.
Power typeCompressed air, electricity
Chemical pickup typeDraws from concentrated product
Dilution ratio range (water:chemical)*7:1 to 125:1
Note: Dilution rate can be set independently for each product
Number of products unit can draw from (and whether it draws simultaneously or one at a time)Two products, simultaneously
Suction line length/diameter8 ft. (2.4 m) clear hose with 1/4 in. (6.4 mm) inside diameter
Output volume19 gal/min (72 l/min)
Flow rate*2 gal/min (7.6 l/min)
Pump sealsSantoprene, Viton, or Kalrez
Timer operation typeRepeat cycle
Coverage areaOne nozzle: up to 9x5 ft. (2.7x1.5 m);
Two nozzles: up to 8x4 ft. (2.4x1.2 m) at each nozzle;
Three nozzles: up to 6x3 ft. (1.8x0.9 m) at each nozzle
Fan tipOne nozzle: ST80200;
Two nozzles: ST80100;
Three nozzles: ST8060-1/2
Nozzle typeTwin-line stainless steel nozzle assembly (GK7T)
Number of nozzlesOne control box can support up to three nozzle assemblies
Distance from nozzles to control boxThe combined distance between the control box and the nozzle(s) must equal 100 ft. (30.5 m) or less
Tubing/fitting sizesDesigned for use with 1/2 in. (12.7 mm) outside diameter tubing between control box and nozzle(s)

*Dilution rates and flow rates given are based on chemical with viscosity of water and factory air pressure settings.

What's in the box?

  • Complete foam unit
  • Twin-line foam nozzle(s) with spray tip(s)
  • Adjustable ball-type nozzle insert to hold spray tip
  • Mounting hardware for control box and nozzle(s)
  • Clear tubing (50 ft. (15.2 m) of 1/2 in. (12.7 mm) outside diameter tubing per nozzle)
  • Tee fittings
  • User manual


 Pump Seal Material Number of Nozzles
DS4-2PSantoprene (standard)-One (standard)
Viton (V)Two (2)
Kalrez (K)Three (3)

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

  • DS4-2P (standard unit with Santoprene pump seals and one nozzle)
  • DS4-2P-2 (unit with Santoprene pump seals and two nozzles)
  • DS4V-2P-2 (unit with Viton pump seals and two nozzles)

Also available in a version for single products >>

Pump Seal Material Compatibility

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616.656.9225 or 800.567.5420