Abstract: A liquid purification apparatus having a main body having means to allow liquid to enter the main body is disclosed. An exit means allows exit of liquid from the main body. A solid compound is located within the main body for dissolution by the liquid. Means cooperating with the solid compound expose a substantially consistent surface area of the compound to the liquid.

Abstract: The invention provides water sterilizing apparatus (10) adapted to employ the process of heavy metal sterilization and including a body (11) defining a chamber (12) formed with spaced inlet and outlet openings (13, 14) whereby water may be caused to flow through the chamber, a silver anode (15) to coact with at least one cathode (16) spacedly mounted in said chamber for release of Ag+ ions to the flow of water therebetween; electric circuit means (17) including power cell means (18) associated with said body and connected to said electrodes (15, 16); an on/off switch (20) in said circuit means (17) normally disposed inoperatively so that the circuit is open when water is not entering said chamber (12) at said inlet opening (13), and a switch-actuating valve assembly (21) mounted movably adjacent said inlet opening, said valve assembly being normally urged in biased manner to a position in which it closes the inlet opening (13) but adapted to be moved against said bias by water caused to flow through said inle