I've tried 3 different foam cannon with my pressure washer (by major name brands) and was disappointed with them all. Either they were way too loud or didn't make enough foam. I finally found one that was real good, powerful, made a lot of foam, AND was pretty inexpensive (compared to Adams, Chemical Bros).

I have no affiliation with the company at all (I promise), but I found this Rydell foam cannon it at Amazon and paid under $50. Now it's on sale for $37.97. Yes, I'm a little pissed that I didn't get it at that price, but I've emailed them and asked for a refund of the difference (fingers crossed!). Either way, it's definitely worth the $38 bucks.

 

Hmmm. Amazon price showing $29.95 currently.

 

Foam cannon for washing the car I guess?? Never heard of this. Woody

 

In my experience, they are only useful for applying the soap.
You will still have a layer of dirty haze if you don't wash with a mitt or sponge.
But then, that's just me, others may have better luck.

 

I always used a foam cannon on the engine and bay. Let it sit 5 minutes or more then power wash off.

 

Only works with a certain power washer !!!