Abstract: A system and a method of aerating well water using an aeration system comprising a well water drop pipe approximately vertically positioned having a bottom end in a well below the pumping level of the well water. Attached to the bottom end of the pipe is a submersible water pump, and a limited check valve is fluidly attached above the water pump. A flow restrictor is fluidly attached above the limited check valve to limit the flow of water up the pipe, and above the flow restrictor or the check valve is fluidly attached a bleeder to allow air to flow into the pipe when negative pressure is in the pipe. Above the bleeder is fluidly attached at least one check valve to prevent flow of water back to the bleeder.

Abstract: A battery includes a plurality of frames of plastics material, each frame comprising a perimeter member and one or more division elements together defining two or more active material support spaces. The frames are arranged in a stack and the perimeter member and division elements of each frame are connected to those of adjacent frames. Each support space receives an electrode, and every alternate division element has on one side two connector recesses extending over a minor proportion of its length, connector recesses in adjacent frames being in division elements that are offset from one another. The spaces on each side of each division element receive electrodes which are connected together by connectors which are received in the connector recesses. Preferably that portion of each division element which overlies a connector recess in the adjacent frame has an elongate recess in it, the connector recess and elongate recess containing a sealing material.