Is water baptism a requirement for salvation?
Yes, water baptism by emersion is a requirement for salvation. There are minor exceptions as in the case of a child who is in critical medical care or placed in an incubator. Alteration in emersion is permitted, but water is still required even if it is in a very small amount. For further explanation, please follow the link: http://www.suscopts.org/messages/lectures/sacrament5.pdf.