Aquacomputer Dr. Drop Pressure Tester includes Air Pump (34087)

Product Review (submitted on January 28, 2022):

This is an excellent tool - the materials are quality, the finish is excellent, and it works exactly as described.

If you have trouble maintaining pressure with this tool, *read the manual*. Once you have your system pressurized you have to REMOVE THE PUMP. As long as you have the pump connected it will leak. This isn't a flaw, it's part of the design and described in the manual.