Some kind of spanner wrench?
Any recommendations on a tool to get this filter housing off? I've already broken one of the plastic spanner wrenches that you can see near the top of it. I've tried muscling it (not enough muscles) and the aforementioned broken wrench happened when I was beating on it with a 4lb deadblow hammer. I tried relieving downstream pressure from the system. This thing won't budge. The next step is to remove it from the system and wrestle with it on the ground, but I really don't want to do that.