{"product_id":"suttner-st-160-single-soap-downstream-injector","title":"Suttner ST-160 Single Soap Downstream Injector with 3\/8\" Quick Connects","description":"\u003ch2\u003eSuttner ST-160 Single Soap Downstream Injector\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eSuttner ST-160\u003c\/strong\u003e is the professional single-chemical \u003cstrong\u003edownstream injector\u003c\/strong\u003e we build into our \u003ca href=\"\/products\/single-chemical-injector-foam-wash-system\"\u003eSingle Soap Wash System\u003c\/a\u003e, now sold on its own. It installs between your pressure washer and your gun and draws soap straight from your pail, drum, or tote into the water stream at a consistent dilution. There's no pre-mixing, no refilling foam cannons, and no chemical running through your pump.\u003c\/p\u003e\n\u003cp\u003eIt comes with \u003cstrong\u003e3\/8\" quick connects installed on both ends\u003c\/strong\u003e, so it snaps into a standard 3\/8\" quick-connect hose line in seconds. Use it to upgrade an existing setup, replace a worn injector, or build your own soap system for fleet washing, truck washing, detailing, or a wash bay.\u003c\/p\u003e\n\n\u003ch2\u003eWhy Choose the ST-160?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeeps chemicals out of your pump:\u003c\/strong\u003e downstream injection adds soap after the pump, which helps protect seals and valves from harsh detergents\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent dilution:\u003c\/strong\u003e the dosing nozzle meters soap at the same ratio on every wash, so you stop guessing and stop wasting chemical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReady to connect:\u003c\/strong\u003e a 3\/8\" quick-connect plug on the inlet and a 3\/8\" quick-connect socket on the outlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt for pros:\u003c\/strong\u003e Suttner professional-grade construction rated up to 5,000 PSI (350 bar) by the manufacturer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with the lance you already use:\u003c\/strong\u003e pairs with a foam lance, hi-lo wand, or low-pressure soap nozzle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBacked by people who use it:\u003c\/strong\u003e it's the same injector we install in every Image single soap system, and we can help you set it up\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSuttner ST-160 single-chemical downstream injector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater inlet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/8\" quick-connect plug (male), installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater outlet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3\/8\" quick-connect socket (female), installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChemical inlet\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHose barb for chemical pickup tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMetering\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eReplaceable dosing nozzle sets the soap dilution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5,000 PSI \/ 350 bar (manufacturer rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e194°F (90°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecommended pressure washer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2.5 GPM minimum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eChemicals\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOne chemical at a time\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSS-IA-1S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0015\/4196\/3828\/files\/ST-160_Graphic_600x600.webp?v=1661519787\" alt=\"Suttner ST-160 downstream injector parts diagram: 3\/8 inch plug, 3\/8 inch socket, chemical barb inlet, and dosing nozzle\"\u003e\u003c\/div\u003e\n\n\u003ch2\u003eHow a Downstream Injector Works\u003c\/h2\u003e\n\u003cp\u003eA downstream injector uses the Venturi effect. When your lance or nozzle is in \u003cstrong\u003elow-pressure mode\u003c\/strong\u003e (a foam lance, the low side of a hi-lo wand, or a soap nozzle), water speeds up through the injector and creates suction at the chemical inlet. That suction pulls soap through your pickup tube, meters it through the dosing nozzle, and mixes it into the water stream. Switch to a \u003cstrong\u003ehigh-pressure rinse nozzle\u003c\/strong\u003e and the suction stops, so you rinse with clean water.\u003c\/p\u003e\n\u003cp\u003eThat's why the nozzle matters: if the soap nozzle opening is too small, pressure stays high and the injector won't draw. Our Foaminator lance and \u003ca href=\"\/products\/soap-system-premium-single-barrel-hi-lo\"\u003ePremium Single Barrel Hi-Lo Wand\u003c\/a\u003e are built for use with downstream injectors.\u003c\/p\u003e\n\u003cp\u003eWant the full breakdown? Read our \u003ca href=\"\/blogs\/news\/downstream-chemical-injectors-the-complete-guide\"\u003eDownstream Chemical Injectors: The Complete Guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eHow to Install and Use\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eTurn off the pressure washer and release pressure from the gun.\u003c\/li\u003e\n\u003cli\u003eConnect the injector inlet plug to your pressure washer's outlet hose, then connect your wash hose to the injector's outlet socket. Follow the flow arrow on the injector.\u003c\/li\u003e\n\u003cli\u003ePush chemical pickup tubing onto the barb and drop the other end, with a strainer, into your soap container.\u003c\/li\u003e\n\u003cli\u003eSet your lance to low pressure (or use a soap nozzle) and pull the trigger. Soap will begin drawing within a few seconds.\u003c\/li\u003e\n\u003cli\u003eSwitch to high pressure to rinse.\u003c\/li\u003e\n\u003cli\u003eAfter washing, draw clean water through the pickup tube for 30 seconds to flush the injector.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eWhat is the Suttner ST-160?\u003c\/h3\u003e\n\u003cp\u003eThe ST-160 is a single-chemical downstream injector from Suttner. It draws one soap or chemical into the water line after your pressure washer's pump and dilutes it at a set ratio using a replaceable dosing nozzle.\u003c\/p\u003e\n\u003ch3\u003eIs this the same injector used in the Image Single Soap Wash System?\u003c\/h3\u003e\n\u003cp\u003eYes. This is the injector from our \u003ca href=\"\/products\/single-chemical-injector-foam-wash-system\"\u003eSingle Soap Wash System\u003c\/a\u003e, sold by itself for customers who already have a lance, hose, and draw tube.\u003c\/p\u003e\n\u003ch3\u003eWhat's included?\u003c\/h3\u003e\n\u003cp\u003eThe ST-160 injector with 3\/8\" quick connects installed on the inlet and outlet. A lance, soap hose, draw tube, and extra metering tips are not included; those come in our complete soap systems.\u003c\/p\u003e\n\u003ch3\u003eWhat size pressure washer do I need?\u003c\/h3\u003e\n\u003cp\u003eWe recommend at least 2.5 GPM. The injector is rated to 5,000 PSI by the manufacturer and handles hot water up to 194°F.\u003c\/p\u003e\n\u003ch3\u003eWhy isn't my injector drawing soap?\u003c\/h3\u003e\n\u003cp\u003eThe most common causes are: your lance is in high-pressure mode or your soap nozzle opening is too small; the pickup tube or strainer is clogged; there's an air leak where the tube meets the barb; the soap is too thick; or the pickup tube is too long. Check each of these, and flush the injector with clean water.\u003c\/p\u003e\n\u003ch3\u003eCan I use it with a foam cannon?\u003c\/h3\u003e\n\u003cp\u003eA downstream injector replaces the need for a foam cannon bottle. Pair it with a foam lance, a hi-lo wand, or a low-pressure soap nozzle instead.\u003c\/p\u003e\n\u003ch3\u003eCan I run two soaps?\u003c\/h3\u003e\n\u003cp\u003eThe ST-160 draws one chemical at a time. For two-step touchless soaps, see our \u003ca href=\"\/products\/dual-soap-injector-system-hi-lo-wash-lance\"\u003eDual Soap Injector System\u003c\/a\u003e with the Suttner ST-164.\u003c\/p\u003e\n\n\u003ch2\u003eComplete Your Setup\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/single-chemical-injector-foam-wash-system\"\u003eSingle Soap Wash System\u003c\/a\u003e with the Foaminator foam lance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/soap-system-premium-single-barrel-hi-lo\"\u003ePremium Single Barrel Hi-Lo Wand\u003c\/a\u003e for soap and rinse from one lance\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/touchless-1-2\"\u003eTouchless 1 \u0026amp; 2\u003c\/a\u003e truck wash soap\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: center;\"\u003e\u003cem\u003eImage Wash Products (Formerly Reflections Wash Products)\u003c\/em\u003e\u003c\/div\u003e","brand":"Image Wash Products","offers":[{"title":"Default Title","offer_id":67596626362598,"sku":"SS-IA-1S","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0015\/4196\/3828\/files\/2cea3ef1-3142-4214-a6ee-b6355c3f6345.png?v=1790709273","url":"https:\/\/washproduct.com\/products\/suttner-st-160-single-soap-downstream-injector","provider":"Image Wash Products","version":"1.0","type":"link"}