Does QED manufacture a portable bladder pump for use in half inch wells?

Unfortunately, no, we do not. The smallest water pump that we currently make fits into wells that are 3/4-inch or larger. Geoprobe makes a pump that is not actually air-powered but a mechanical bladder pump that will fit into a 1/2-inch well. It’s fairly effective and might be an option. The air-powered bladder pumps that fit into 1/2-inch wells have, unfortunately, shown fairly disappointing results in many cases.