With regards to the Hayward SP1480 Union, does it matter which part/end should be connected to the filter and which to the pump?
One part of the union looks to be the "receiving" (cup-like) end with an o-ring, and the other part looks like a "ball" fitting. If I were to guess, I would say the receiving end would be connected to the filter, as the water flow is coming from the pump?
Also, should the o-ring be lubed?
Thanks in advance for any help....