So I am going to redo some of my plumbing but I wasn't sure if I could use a standard union end as a replacement to the original union that came with the return pump. I have a picture of my return pump and I am talking about the piece that screws onto the output of the pump, the one with the 1" sticker. So can I buy a normal Schedule 80 Union SlipxSlip and just use half of it as a replacement for that piece for my new plumbing set up?? The second picture is what I was going to buy to replace that piece. thanks