Had to have a look at the pool pump as it stopped working yesterday.
It is attached to the rest of the filters and valves with Unions to ease the removal in case of repairs.
I do not have such a huge pipe wrench so this is my solution.
Not the prettiest tool I have ever made, but pool has been in for 12 years and the first time I had to attend to the pump.
Easily loosened off the unions and connected with no leaks.