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Concentrate Spray Unit


Wall mounted, air-powered, concentrate spray unit with a stainless steel ball valve. Choose between Santroprene, Viton, or Kalrez pump seals and hose color options.



  • draws from concentrated product
  • dilutes product at ratios of 34:1 to 640:1 or 24:1 to 640:1, depending on fan tip used
  • powered by compressed air
  • quick-change pump
  • poly spray gun wand with fan tip
  • anti-kink hose protection
  • color coding options:
    • discharge hose – 4 colors (BL, GN, YL, RD)
  • consistent, reliable dilution rates, regardless of changes in water pressure


Concentrate Spray Unit

Operation Manual

Concentrate Spray Unit

power type

compressed air

chemical pickup type

draws from concentrated product

dilution ratio range (water:chemical)*

34:1 to 640:1 with ST2520 fan tip;
24:1 to 640:1 with ST2550 fan tip

number of products unit can draw from

one product

suction line length/diameter

8 ft. (2.4 m) clear hose with 1/4 in. (6.4 mm) inside diameter

discharge hose length/diameter

50 ft. (9 m) hose, with 1/2 in. (12.7 mm) inside diameter

discharge wand/tip type

polypropylene trigger handle with 25˚ fan tip

output distance

10-12 ft. (3.0-3.7 m)

output volume

2 gal/min (7.6 l/min) of liquid with ST2520 fan tip;
4-5 gal/min (15.1-18.9 gal/min) of liquid with ST2550 fan tip

flow rate*

2 gal/min (7.6 l/min) with ST2520 fan tip; 4-5 gal/min (15.1-18.9 l/min) with ST2550 fan tip

pump seals

Santoprene, Viton, or Kalrez

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

compressed air requirements

40-80 psi (3-5 bar) with 2 cfm (28.3 l/min)

water requirements

10-100 psi (0.69-6.9 bar)
backflow prevention is required – consult local plumbing ordinances for more information

liquid temperature range

40-100˚F (4.4-37˚C)

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.

SP-WC Santoprene (standard)
Viton (V)
Kalrez (K)


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

  • SP-WC (standard unit with Santoprene pump seals)
  • SP-WCV (unit with Viton pump seals)

other available options:

  • color coding – discharge hose
  • control box assembly
  • discharge hose and wand
  • mounting hardware
  • metering tip kits for spray injector
  • stainless steel hose rack
  • user manual


Support Videos

How to set the operating pressure on a water regulator (WR12SS) for wall mounted units


How to change the water regulator (WR12SS) for wall mounted units


How to change a pump - with quick-change pump bracket

How to replace a hose or wand


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: https://www.coleparmer.com/Chemical-Resistance) 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 techsupport@foamit.com and we can help.

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