Review on 🚽 Master Plunger MP500: The Ultimate Heavy Duty All Purpose Plunger for Commercial & Residential Use – Ideal for Laundry Tubs, Bath Tubs, Kitchen Sinks, Garbage Disposal, and Toilets. With Air Release Valve and Powerful Plumbing Performance by Richard Nonya

Generates a lot of pressure with little effort - the knob turns to let the air out as you squeeze the plunger, then turn 2 to close B4, sucking it in and the compartment with it water to fill - I use water instead of air for reliable cleaning the first time - same B4 has lasted many years / once you get the hang of it - you will never use another - no splatters and most important - MADE IN USA! - sale ! highly recommended, well built / durable / cheap / color choice