Maintaining readiness in fire hydrants
AssigneeClearwater International, LLC
InventorsWilliam Hyland, John H. Hallman
Life of this patent
Estimating the term…
Abstract
Fire hydrants are protected from freezing by including potassium formate, preferably at least 10% by weight, in the water enclosed in them during nonuse.
Claims12
Method of maintaining a fire hydrant in working condition in cold weather, said fire hydrant having a water chamber, comprising placing in said water chamber an aqueous solution comprising potassium formate, in an amount effective to inhibit freezing.
Method of inhibiting the growth of microorganisms while also inhibiting freezing in fire hydrants comprising adding to water in a water chamber in said fire hydrants at least 7% by weight potassium formate, whereby both freezing and the growth of microorganisms are inhibited in said water chamber.
A fire hydrant having a water chamber containing a solution comprising at least 10% by weight potassium formate, said water chamber being inhibited thereby from freezing.
Dependencies are inferred from the claim text.