I am replacing the connections to my pump with black high-temp union fittings due to a leaking high pressure output side. I will be replumbing the inlet, outlet, and putting a union fitting on the inlet of the filter. I will be putting new pipe from the pump to the filter to clean that area up a bit. My question is regarding the pump. Once I cut the input pipe and output pipe, will the pump be free moving or is it anchored to the pad somehow? I just want to be sure that I can slide the pump forward a bit because it looks like the union fitting will require it (It is sitting on top of the inlet pipe)?