Mei Chatos is metaher temeim and metameh tehoirim. In itself the mei chatos is not tomeh.
Why, therefore should the mei chatos drunk by the cow taking it out of its mei chatos status, be able to metameh (as it was never tumeh to start off with) ?
Sh F, United Kingdom
Dear Sh. F.,
Mei Chatas is Tamei on the level of Av HaTuma. See Mishnayos Keilim 1:1,2. Also see Rambam Hilchos Para Aduma 15:1. Only a toucher or lifter of Mei Chatas for the sake of sprinkling does not become Tamei.
All the best,
Reuven Weiner