I want to replace the stem of a frost-free (sillcock) valve; it appears to be 6in. I don't want to replace the whole thing, as it is in a difficult-to-access place. The valve wast installed about 15 yrs ago; I could not identify it by searching google images. The far end of the stem is not round; it appears vaguely triangular.
I could not find any markings anywhere on the stem; the body of the valve has the UPC mark and characters L.T. above. The backflow protector is B.K. / Mueller, but I am not sure the rest is by Mueller as their sillcock stems (that I could find pictures of) look different.
Any advice on who might be the manufacturer of the valve would be much appreciated.