The Silencer Kit: Suttner ST-160 Foam Injector + ST-75 Foamer

6 reviews
Nozzle Size (See Chart at Bottom of Page if Unsure)
Pick Up Tube Option
Choose Your Gallon

Based on 1 review

The Silencer kit

This simple, efficient and durable foaming system features the Suttner ST-160 Foaming Injector and the Suttner ST-75 Foamer. This system solves the biggest problem with all foam cannons which is the refills by injecting the chemical at the outlet of the power washer. The ST-160 utilizes dosing nozzles for automatic dilution with a range of 10:1 to 200:1, completely eliminating all guess work when it comes to the strength of your soap. We set these injectors to draw at 100:1 which is 1% of the GPM, perfect for our super concentrated soaps. This equals 4-5 times less soap than standard injectors. Not only do you get the benefit of efficiency but you also get further cling time allowing work on larger areas and less soap run off.
This professional but affordable package is completely plug and play. To install, plug the ST-160 Injector onto the outlet of your power washer. To engage foam mode, attach your ST-75 Foamer to the gun or lance outlet. To switch back to rinse, reattach your rinse nozzle.


1. Suttner ST-160 Single Foaming Chemical Injector
2. Pick Up Tube Option: Choose Safe Flow Lid OR Standard Pick Up Tube
3. Suttner ST-75 Foamer Complete with 1/4" QC Plug
4. Liquid Option: Choose One OR None


SUTTNER ST-160 Injector

The Suttner ST-160 Single Chemical Injector is the most efficient and durable foam injector available, with a dilution range from 10:1 to 200:1. Constructed completely from high quality stainless steel and no moving parts this injector was built to last. MORE INFO HERE.
  • Plug + Play
  • Uses 4-5x Less Soap Than Traditional Style Injectors
  • 9 Dosing Nozzles Included
  • Durable Stainless Steel Construction

*Other downstream injectors must be removed from your machine.
*Limited to 150' of power washer hose after the injector.
*ST-160 injectors come standard with a 3/8" QC Plug on the inlet and a 3/8" QC Coupling on the outlet. QC orientation can be reversed upon request.


Your choice of pick up tube strainer style

Both styles come with 10' of pick tube that can be cut to any length.

SAFE FLOW LIDS provide safe and convenient dispensing of chemicals from 1 gallon containers. The threaded lid keeps out contaminants, prevents chemical splashing and spillage. These unique, heavy-duty, machined polypropylene lids attach to a chemical pick up tube with a 1/4" hose barb and can be quickly unscrewed and attached to another container or easily removed and stored. Includes a hastelloy strainer and suction assembly to place inside the chemical container.

STANDARD pick up tube with weight & strainer. Compatible with 1 gallon containers, 5 gallon pails & 55 gallon drums. 



The compact ST-75 produces thick foam for an easy application with out any mixing or refilling. The quick connect plug makes swapping from the ST-75 to your rinse nozzle quick and easy.
  • Can Be Attached At Gun Or At End Of Lance. (Lance & Gun Not Included)
  • Produces Thick Foam 
  • Durable Construction 
  • Installed 1/4" Quick Connect Plug
  • Easy To Use
  • -



      LIQUID-X: Our most extreme foaming mitt wash formulated to leave a polymer barrier on your vehicle that generates beading and protects the surface.

      HEAVY DUTY: An extremely flexible foaming truck wash that can tackle anything from a simple maintenance wash to heavy degreasing.

      SNAKE OIL: Our touchless Si02 ceramic foam sealant. Adds an extremely durable hydrophobic layer of protection to any and all vehicles.

      M-SHINE: A high foaming polished aluminum cleaner and maintainer.

      FOAM: A high foaming mitt wash without any additives. 


      How to Install

      1. Connect ST-160 injector after power washer and before your high psi hose. The ST-160 will be made ready with a stainless 3/8" quick connect plug on the inlet and a stainless 3/8" quick connect socket on the the outlet.

      2. Place chemical pick up tube directly into soap.

      3. Foam all of the things!

      • Injector will be set to run at 100:1 unless specified otherwise, this can be changed by simply changing metering tip inside injector barb.
      • If using a hot water machine, scale build up from your coil can plug injector or foam head. On start up always run with injector in rinse mode for about 30-60 seconds to flush out any build up.
      • If a jumper hose is needed to go from your power washer to ST-160 injector please see our selection of hoses.


      Figure out Your current rinse nozzle size

      Use the chart below to figure out your nozzle size. You will need your power washer's current GPM and PSI. This information is usually found on a sticker located on your machine.

      ST-164/ST-160 Dosing Nozzle RATIO + PERCENTAGE Chart 

      The chart below shows dosing nozzle size (opening) and the percentage of draw when the chemical used has the same viscosity as water. 

      How To Repair Common Issues on Suttner Foam Gear


      SUTTNER ST-160

      • Stainless Steel Injector (9 metering/dosing nozzles included)
      • Min/Max Flow Rate: 1-6gpm
      • Min/Max PSI: 1000-4000psi
      • Rated for 194 degree water
      • Uses one chemical at a time 

      SUTTNER ST-75 Foamer

      • Pressure: 4000 PSI
      • Flow Rate: 1-6 GPM
      • Temperature: 212° F
      Customer Reviews
      5.0 Based on 6 Reviews
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      Filter Reviews:
        Junior M.
        United States United States
        I recommend this product

        If I could, i'd give it 10+ stars! Hated re-filling the changing foam cannon and this is exactly what I was looking for, for about 2yrs. THANK YOU

        Chem-X The Silencer Kit Review

        That's awesome to hear that thanks for the feedback!

        Adrian W.
        United States United States
        I recommend this product
        Better than Foam cannons

        Products work well im in new brunswick canada ��..owner operator as i said before in laat feedback....Just wish you had a system for cross border shipping to save some import cost....I shipp my stuff to maine pick it up on way bac home delivered to me would work better i could re stock quicker...Thks stay clean....

        Chem-X The Silencer Kit Review

        Thanks for the feedback Adrian. I would love to have a solution to be able to sell in Canada as well hopefully we can set that up in the future.

        Shamon H.
        United States United States
        The Silencer

        Been needing this for sooo long and finally got it. It’s better than a foam cannon and use less product


        I'm glad you like it thanks for the feedback!

        Carlos G.
        United States United States
        The best thing ever

        Makes my job easy and faster I would buy it agin


        Awesome glad to hear it Carlos!

        Raul M.
        United States United States
        Foam, Foam, and more Foam

        After looking at the overall presentation I was skeptical, wondering if I could achieve the same results. Nevertheless, I have no more skepticism...I used the silencer kit on 80 box truck units. Originally what took me a day and a half was cut short. Due to the efficiently of not having to refill a 1.5L foam cannon, I was able to cut my time in half. I will be making a second and third purchase for my other rigs. And if you want to know how the Silencer kit compares to a foam cannon... the lather is thick and stays on longer, you can choose the dilution ratio easily which works well if pulling a pure concreate in a 5Gal, 30Gal, or 55Gal container. 5 Starts - Red Drum Power Clean - Houston, TX