Product review (2 stars): Wrench does not provide enough leverage.
Although the wrench fits the filter housing very well, it has a short arm which does not provide enough leverage to loosen the filter housing.  It appears that the previous house owners did not replace the element regularly so the housing is stuck in place very tight.  I did everything that I could possibly do relieving the pressure in the filter assembly and such but even with two persons, one holding the piping steady and the other turning the wrench,  the housing would not budge.  I thought about tapping the wrench hard but was concerned about damaging the pipe.  Being made of plastic, there is probably a limitation with making the arm too long due to loss of rigidity.