The Roof Cleaning Institute Of America Training & Certification Forum
"Find A Certified Roof Cleaner Directory"

Hey John,..I run a 1/2" with a wheelbarrow compressor that puts out 11 CFM. Works fine and I feel no need to go out of my way to make room for a bigger compressor. BUT,.the pump will work more to it's real capacity when a properly sized compressor is used. I never feel under powered though.

Here's the thing though,..more volume is always better,..but to me the main benefit of more volume is it allows the air to cool before entering the pump,...these air pumps are great but they like cool dry air. These small volume compressors don't have enough reserve to allow any cool off period for the air,...and when that hot air gets into the lines and the pump itself, it condensates and creates a stalling issue.

One of the best things I did earlier this year was learning the way a proper air system is set up. I don't use all the ideas behind the proper set-up due to space limitations,...but I did learn how water traps work and also how to cool the air before it enters the pump. This little bit of knowledge has completely stopped any stalling.

Here is a link to what I learned: http://roof-cleaning-institute.activeboard.com/t57963936/stalling-air-pump/

Jeff