Fluoridation system

Claim 1

A fluoridation system including a venturi inserted into a water line along the length thereof, said venturi including a throughbore having a diminishing tapered section followed by an increasing tapered section in the direction of liquid flow, a passage intersecting said throughbore and extending substantially perpendicularly thereto, means associated with said venturi for withdrawing water from said water line, a first conduit means including an inlet end for transferring water from said withdrawing means to and through a chamber containing a water softening material for softening the water passing through said first conduit means, flow rate measuring means in said first conduit means, flow control means in said first conduit means, said first conduit means including an outlet end connected to a fluoride chamber containing a water-soluble fluoride salt, said outlet end of said first conduit means being connected adjacent the bottom of said fluoride chamber, a second conduit means connected adjacent the top of said fluoride chamber, said second conduit means connecting said fluoride chamber with said passage of said venturi which is substantially perpendicular to said throughbore thereof, flow control means in said second conduit means, said fluoride chamber including a transparent portion for inspection of the contents thereof.