Patent ID: 7537707

Claim:
A method for controlling pH of pump-circulated water comprising the steps of: providing a gas injector comprising: a hollow body; a connector coupled to a proximal end of the hollow body; a valve chamber coupled to a distal end of the connector and housed within the hollow body; a backflow prevention valve housed within the valve chamber; and a sintered diffusion insert coupled to a distal end of the backflow prevention valve; coupling a proximal end of the connector to a gas delivery mechanism and coupling a distal end of the hollow body of the gas injector to a pump strainer basket housing drain port; releasing gas from the gas delivery mechanism and through the gas injector; diffusing the gas by passing it through the sintered diffusion insert; blending the diffused gas with water that enters into the pump strainer basket housing; passing the diffused gas and water through a pump impeller and into a filter; passing the diffused gas and water out of the filter.