The British Berkefeld Emergency Water Filter system is designed for use in situations where a reliable supply of treated drinking water is unavailable.
(The British Berkefeld Emergency Water Filter system; is designed; for use in situations) (a reliable supply of treated drinking water; is; unavailable; L:situations)
The British Berkefeld Emergency Water Filter system a reliable supply of treated drinking water
is designed is
for use in situations
unavailable L:situations