Plumbing power tools restore flow in pipe and join or repair pipe to set up and maintain piping systems. Drain cleaning power tools remove blockages and clean drains more thoroughly and with less effort than manual drain cleaning tools. Pipe inspection equipment and locators reveal problems within pipe without having to dig up and cut into pipe. Pipe connection and cutting power tools prepare new pipe for installation or repair damaged pipe. Pipe stands and vises support pipe to keep both hands free to thread, cut, weld, and position pipe and other long workpieces. Pipe alignment tools and flange spreaders bring together or pull apart pipe ends when installing and servicing pipelines. Pipe freezing and thawing equipment allows repair of water pipes without shutting off the water or draining the lines. Valve exercisers repeatedly open and close valves to prevent them from stiffening or seizing.