I am going to guess that by snakes you mean the tubes that attach to the walls and swing around? My old 70s pool has the holes for them, but I have never actually seen a picture of the "snakes" ... certainly would be interested in seeing a picture / video of them in use.
Backwashing and filling up with water should have not affect on them working. Is the pump primed? Did you change any valves? Is water flowing?
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!