Because of leaks, I'm changing my setup. I've got a Hayward Power-Flo Matrix pump, and I'm attaching Hayward Unions to the pump discharge (the part# is SP1500UNPAK2). I've got 1.5" I.D. braided clear tubing between the pump and the filter, so I need a fitting to connect the union to the clear tube. What size is the male side of the Hayward union? And can I buy the fitting at a big box store, or is it going to be another "patented thread" from Hayward, so I'll have to buy something either online or from the pool store?