The 14 best pressure washers with detergent injector of 2025

𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐭 𝐂𝐥𝐞𝐚𝐧𝐢𝐧𝐠: The chemical injector for pressure washer uses the siphon principle to draw detergent from a separate container. It's suitable for various cleaning tasks, including driveways, cars, roofs, and walls, ensuring safe and effective cleaning.

𝐔𝐬𝐞𝐫-𝐅𝐫𝐢𝐞𝐧𝐝𝐥𝐲 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧: The chemical injector comes equipped with 3/8" quick connect fittings on both ends for easy installation between the pressure washer pump and hose. This configuration prevents chemicals from backflowing into the pump, safeguarding its functionality.

𝐀𝐭𝐭𝐞𝐧𝐭𝐢𝐨𝐧: When installing the fixed chemical injector, ensure that the arrow on the injector aligns with the direction of water flow; otherwise, it will not function properly.

𝐇𝐢𝐠𝐡-𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥𝐬: This general pump downstream injector is made from premium brass and stainless steel, resistant to chemical corrosion, and can handle pressures up to 3200 PSI with a flow rate of 3-5 GPM.

𝐏𝐚𝐜𝐤𝐚𝐠𝐞 𝐈𝐧𝐜𝐥𝐮𝐝𝐞𝐬: The package contains a brass downstream injector, a 3/8" qc plug to 3/8" npt female adapter, a 3/8" qc socket to 3/8" npt female adapter, two rolls of teflon tape, a black soap nozzle, a 10 ft siphon hose and a filter.

Package: Kit Includes chemical injector, 10 feet siphon hose, filter, black nozzle soap with 1/4” quick connect and teflon tape.

Application: When detergent is sucked out separately, the chemical will not pass through the pump, you could use a variety of chemicals without damaging the pump.

Characteristic: Chemical injector kit with a metering valve, which can adjust dilution ratio of soap and water. Avoid clogging of the injector and improve the efficiency of pressure washer.

Connector: Downstream Injector has 3/8 inch quick connect. Fits most electric and gas power washer. It's connected between the pressure washer pump and the pressure washer hose.

Material: Siphon hose is made of high-quality PVC, used for hot and cold water (32°F to 122°F). Adapter is made of brass and stainless steel. Max pressure is 4000 PSI. Flow rate is 2 to 5 GPM.

❤【Premium Quality】Made of tough brass and stainless steel,resistant to corrosion and fading.

❤【Instructioin Manual】The maximum pressure is 4000 PSI. Flow arrows Marks on the injector and do not install it backwards.

❤【Kit Package】The chemical injector kit includes chemical injector, 16 feet tubing (siphon hose), filter and 1/4 inch quick connect black soap nozzle which connect to your gun or wand.

❤【Scientific Design】The soap dispenser kit is equipped with a screw-in valve that adjusts the dilution ratio of chemicals and water to increase the efficiency of your high pressure washers.

❤【Quality Assurance】Any problem,feel free to contact us.The professional team is always ready to serve you.

Adjustable control

2.1mm orifice for pressure washers up to 5.0 GPM

For cold or hot water applications, up to 200deg F

3/8in. inlet/outlet

【Compatible】 Pressure Washer Soap Syringe Kit is compatible with pumps 190593GS, 190635GS and 203640GS. (1/8'' -27 BSP male thread)

【Replacement method】 Remove the old fuel injector with a wrench. Remove any sticky or dry soap from the container. Make sure the rubber o-ring is on the injector as shown. Put the ball bearing in the injector, and then use the spring on the small end of the spring against the ball bearing. Insert the injector into the socket and use a 13mm wrench to tighten the injector. Do not overtighten or it will damage the o-rings or crack the white metal on the pump.

【Function】 If parts on your high pressure washer pump are worn, rusted, or clogged with hard water deposits, you can replace it with this set. This will make your high pressure washer pump smoother to use.

【Package contains】 The 190593GS chemical injector kit including 2 brass barbs, 2 check valve balls, 2 springs, 2 O-rings (2 set).

【Satisfaction Guarantee】 Provides a 100% satisfied after-sales service. If you are not satisfied with it, simply return it within 30 days. Premium Support 1 year Warranty.

Attention: Max pressure is 3200PSI. Pressure washer downstream chemical injector kit includes chemical injector, 10 feet tubing (siphon hose), filter and black soap nozzle.

Used to siphon detergent out of separate container. The chemical or soap runs after pump, which will not damage pump. Great for cleaning or spraying.

Control metering valve to adjust dilution ratio of chemical and water. Chemical-resist and poly strainer reduces injector clogging.

The soap injector is equipped with a universal 3/8’’ quick disconnect, which facilitates effortless and quick installation. It is designed to seamlessly connect between the pressure washer pump and the hose, enabling efficient mixing and dispensing of soap during the cleaning process.

Flow rate is from 2 GPM to 5 GPM. Works with most brands of gas and electric pressure washer, cold and hot water pressure washer.

Pressure washer chemical injector tubing kit includes 10 feet replacement tubing, two filters. The tubing can adjust and cut based on your needs.

ATTENTION: Siphon Hose: Inside Diameter: 7.0 mm; Outside Diameter: 9.3 mm; Length: 10 feet.

Application: Used to siphon detergent out of separate container. It allows for a wider choice of chemicals.

The filter can avoid contaminants enter the pressure washer hose, pump or gun.

Works with most brands of gas and electric pressure washer.

【Fit on】190593GS Chemical Injector Kit is the replacement soap injector kit for various models pumps, fits many other brands with FAIP Pumps and Himore Pumps, such as for Excell DeVilbiss, Troy Bilt, Husky, Campbell Hausfeld, Generac, Coleman Powermate, Ridgid, Task Force, Faip, Homelite, Brute, Duracraft, Simoniz, Simpson, John Deere, etc.

【Function】If the Chemical Injector on your pressure washer is worn-out, rusted or hard-water-deposit clogged, you can replace it with this set.

【Package List】190593GS chemical injector kit comes with 2 Chemical Injector Sets, including 2 Brass Barbs, 2 Check Valve Balls, 2 Springs, 4 O-Rings.

【Easy Installation】How to replace: Follow soap hose to end and you'll find injector. Take off soap hose. Use wrench to remove old injector. Clean out any gunk or dried soap in receptacle. Make sure rubber o ring is on injector. Put ball bearing inside injector and then the spring with small end of spring against the ball bearing. Insert injector into receptacle and tighten injector with 13mm wrench. Don't overtighten, you'll break the o ring or crack white metal on pump.

【Satisfaction Guarantee】We are dedicated to delivering professional and heartfelt service to enhance your shopping experience. If you're not completely satisfied with your purchase, simply return it within 30 days. Additionally, we offer a 12-month warranty for your peace of mind.

Siphon Hose Chemical Injector Kit: You will receive 1 pressure washer siphon hose with filter, 1 pressure washer chemical soap injector kit compatible with Briggs and Stratton, Homelite, Ryob and Husky Replaces 190593GS 190635GS and 203640GS

Pressure Washer Soap Tubing Kit: The pressure washer siphon hose is 10 ft long with a 0.25-inch inside diameter and 0.35 inch outside diameter that matches common chemical injector kit on the market and is perfect for mixing and injecting fertilizers, agrochemicals, soaps, detergents, and plant nutrient solutions with water through power washers

Pressure Washer Soap Injector Kit: The replacement soap injector kit Includes 1 brass barb, 1 check valve ball, 1 spring, 2 O rings, if the chemical injector set for pressure washer is worn, rusted or clogged by hard water deposits, you can replace it with this kit, which will make your pressure washer pump run smoother

Dense Screen Filter: The siphon hose is equipped with a soap suction filter, which can prevent 95% impurities (>0.5 mm) entering your pump. The hose filter is made of plastic body and stainless steel mesh material with a thickened bottom designed to increase the weight of the filter. It sinks right to the bottom and is very easy to use

High quality material: The downstream injector siphon hose is made of PVC, which is tough and can be bent many times without damage, corrosion-resistant to common liquids such as oil, agricultural chemicals and detergents; Pressure washer chemical injector kit is made of tough brass and stainless steel, which is corrosion resistant and fading-resistant, ensuring long-term stable usage

High Quality: Siphon hose for downstream injector is made of premium PVC material, which has a certain corrosion resistance to common liquids such as oil, farm chemicals, detergent and water; The tube also has very strong toughness and can be bent many times without being damaged.

Efficient Screen: Unique suction hose strainer is capable to prevent 90% impurities (>0.5 mm) from blocking your equipment and causing loss. Two filters are thoughtful equipped for you to replace.

Multiple Use: Pressure washer siphon hose kit is ideal for mixing and injecting fertilizer, farm chemicals, soap, plant nutrient solution with water through power washer.

Easy Match: The Suction hoses measures 10 feet in length, 0.28 inch inner diameter and 0.35 inch outer diameter, well matches with common pressure washer injector brand in the market. It is a good choice to be a replacement for professionals.

Scientific Design: The siphon hose of the pressure washer is used to suck out the solution (agrochemicals, detergents, nutrient solution, etc.) from the container and mix it with the water flowing out of the pressure washer for efficient cleaning or tillage.

6 month no hassle warranty

Max - 2.7 to 4.9 GPM

Direction of flow 'arrow' marked on injector body

Stainless Steel ball and seat.

Adjustable control

1.8mm orifice for pressure washers up to 3.0 GPM

For cold or hot water applications, up to 200deg F

3/8in. inlet/outlet

HIGH-QUALITY CONSTRUCTION: Made from durable brass materials to ensure long-lasting use and reliable soap application. Perfect for applying detergents or cleaning solutions to tackle tough stains and grime.

WHAT IT DOSE: A Pressure Washer Soap Injector Kit is an accessory that allows you to apply soap or detergent through your pressure washer. It works by drawing soap from a container and mixing it with water before being sprayed out through the pressure washer. This kit is especially useful for cleaning tasks that require the use of detergents, like washing cars, driveways, siding, or other surfaces where water alone might not be sufficient.

COMPATIBILITY： Pressure Washer Soap injector Kit is compatible with pumps 190593GS, 190635GS and 203640GS. Fit For many brands like Excell DeVilbiss, Troy Bilt, Husky, Campbell Hausfeld, Generac, Coleman Powermate, Ridgid, Task Force, Faip, Homelite, Brute, Duracraft, Simoniz and Simpson which those are equipped with FAIP Pumps and Himore Pumps

HOW TO REPLACE: Remove the old fuel injector with a wrench. Remove any sticky or dry soap from the container. Make sure the rubber o-ring is on the injector as shown. Put the ball bearing in the injector, and then use the spring on the small end of the spring against the ball bearing. Insert the injector into the socket and use a 13mm wrench to tighten the injector. Do not overtighten or it will damage the o-rings or crack the white metal on the pump.

PACKAGE INCLUDED: 4 brass barbs, 4 check valve balls, 4 springs, 4 O-rings (4 set). Standard 1/8" -27 male BSP thread fittings which allows for easy integration with most pressure washers.

LEAK-PROOF DESIGN: The kit should include well-sealed rubber O-rings that prevent leaks during use. Quality O-rings ensure tight connections between the injector and pump components, maintaining efficiency and safety.

Effortless Soap Application – Easily mix and apply detergent with your pressure washer for a deep and effective clean

Universal Compatibility – Designed to work with most gas and electric pressure washers, ensuring a seamless fit

Durable & Corrosion-Resistant – Made from high-quality brass and stainless steel for long-lasting performance

Adjustable Flow Control – Fine-tune the soap-to-water ratio for optimal cleaning efficiency on various surfaces

Ideal for Multiple Cleaning Tasks – Perfect for washing cars, driveways, siding, patios, and more with professional results