Filter media for use in pool filters
AssigneeIndustrial Insulation Group
InventorRay Gaudin
Life of this patent
Estimating the term…
Abstract
A sand filter for use with swimming pools includes a tank that has a hollow interior space and a top diffuser for allowing spent pool water to enter the tank and for distributing the pool water inside the tank. The sand filter also includes filter media formed as a bed of material on a bottom of the tank and also includes laterals that are located under the filter media and allow filtered pool water to exit the tank and flow back to the pool. The filter media includes a bed of sand that is disposed on the bottom of the tank and a layer of perlite material that is disposed on a top surface of the bed of sand. The perlite material is a high flow rate, low density perlite material that only contains a trace amount of floaters.
Claims14
A sand filter for use with swimming pools comprising:
- a tank that has a hollow interior space;
- a top diffuser for allowing spent pool water to enter the tank and for distributing the pool water inside the tank;
- filter media formed as a bed of material on a bottom of the tank;
- and
- laterals that are located under the filter media and allow filtered pool water to exit the tank and flow back to the pool;
- wherein the filter media includes a bed of sand that is disposed on the bottom of the tank and a layer of perlite material that is disposed on a top surface of the bed of sand, the perlite material being a high flow rate, low density perlite material that only contains a trace amount of floaters.
A method of at least substantially eliminating Cryptosporidium organisms from pool water comprising the steps of:
- passing pool water through a sand filter to generate filtered pool water, wherein the sand filter includes a filter media comprising a bed of sand that is disposed on a bottom of a tank of the filter and a layer of perlite material that is disposed on a top surface of the bed of sand, the perlite material being a high flow rate, low density perlite material that only contains a trace amount of floaters.
A method of forming a sand/perlite layered filter media in a sand filter that is part of a swimming pool that includes a skimmer, comprising the steps of:
- adding sand to the bottom of a tank of the sand filter to form a bed of sand;
- operating the sand filter so that water passes therethrough;
- and
- adding a predetermined amount of perlite material through an inlet of the skimmer that is in communication with pool water, while the sand filter is operating, resulting in the perlite material being added as a layer to a top surface of the bed of sand.
Dependencies are inferred from the claim text.