I have a older tub that I have brought back to life. I am having a problem with the union fitting coming out of the pump. I cannot get it to stop leaking it is only a trickle but it is driving me nuts. I have had it appart several times. New washers, check the sealing lips, checked the alignment. Nothing seems to work. I have to drain the tub each time I break the fitting. ARRRRRR! Has anyone got an idea?