Patent ID: 6910495

Claim:
A fire hydrant system, relating to protecting the purity of potable water systems from contamination from frangible-barrel-fire-hydrant use, comprising, in combination: a) at least one frangible barrel fire hydrant comprising i) at least one upper barrel body ii) at least one lower barrel body, iii) at least one frangible plane between said at least one upper barrel body and said at least one lower barrel body, iv) at least one water outlet chamber, extending from said at least one upper barrel body, and v) at least one water entry into said at least one water outlet chamber from said at least one upper barrel body; b) wherein said at least one upper barrel body and said at least one water outlet chamber together comprise exactly one unitary-construction housing; c) at least one water-flowable channel extending from within said at least one upper barrel body, through said at least one water entry, and through said at least one water outlet chamber; and d) at least one backflow preventer situate within said exactly one unitary-construction housing; e) wherein said at least one backflow preventer is adapted to assist prevention of backflow of water through said at least one entry.