Refrigeration Technologies Viper Foam Jet Sprayer 2-in-1 Hand Pressure Sprayer RT301S for Coil Cleaners, Venom Packs, Pan & Drain Treatment, and Big Blue Leak Detector

Works well. It's labeled in Chinese units though. Would be nice if they had a US-friendly version of it. Viper sells their own brand of detergent but it works with pretty much any soap/detergent so long as it's not acidic. It can be a base for not acid.

Bought the sprayer, it would not stop spraying even when you turned the trigger off. It has an automatic mode, but that was not turned on. You just cannot make it stop spraying doesn’t work. Well if you tip it trying to spray, material seem good just expect better quality for, this overpriced sprayer . Products from this company have been excellent just not so much on the pop sprayer. Wish that it worked better. Waited and paid extra for this thing hoping it would deliver, but just not impressed.