P/N:102-528 51B22 RK6-43P1Z JU050XPO KC 040 XPO KA020 BY6K - alternative is KA 020 BR6K KA 020 BR6K 25062 700 A99 KC 055 CPO 50533001 9L5 S/N 63 OEM 5053300 9L5 Model# 51B06, 1” npt. KM6018-8, A910096 NPT., 816BC-1/2”;Kaydon Flow Switch JU 047 XPO JU 050 XPO