You can inject anything liquid. Soap? Yes. Bleach? Sure. Vinegar? Go for it. But here's the punchline: do NOT inject gasoline, paint thinner, or your leftover Frappuccino.
Why? Because that stuff will destroy the seals in your pump. A five-dollar mistake with solvents can turn your pressure washer into a sad, leaky sprinkler. Keep it to water-based cleaners. Your machine will thank you.
Quirky Fact #3: It Smells Like a Science Lab
When you first use it, you'll smell weird chemical smells. That's not a problem—it's a feature. The kit is pulling concentrated cleaner through the tube, and it smells like a cross between a swimming pool and a janitor's closet.
Embrace it. You now smell professional. Or at least like someone who owns a weird plastic gadget.
Amazon.com: JOEJET Adjustable Downstream Injector for Pressure Washer