Piscina

A piscina is a shallow basin placed near the altar of a Christian church, or else in the vestry or sacristy, used for washing the communion vessels. The sacrarium is the drain itself. Lutherans and Anglicans usually refer to the basin, calling it a piscina. For Catholics and Lutherans, a sacrarium is a "special sink used for the reverent disposal of sacred substances. This sink has a cover, a basi... (Wikipedia)