Shop

Rust is formed when dissolved iron (ferrous) oxidizes to a particle form (ferric). Homes on urban water supplies get rust from corrosion of old distribution piping which is common in many Canadian cities. Homes on private wells can have naturally occurring rust or through the well system. Rust is not considered as a health contaminant but is recommended to be removed for aesthetic reasons (taste, odour, colour, sediment and protection of plumbing devices such as water heater). Since rust is a particle, it can be removed by sediment filters. Homes on private wells that have high ferrous iron (dissolved) should consider a whole house iron reduction system.

A micron , also called micrometer, is a unit of measurement.

1 micron = 1/1000 mm (1/25,000th of an inch) is denoted by the letter µ.

Average human hair is about 75 micron in diameter and coarse dirt is about 40 micron . In filter cartridges, a micron rating refers to the smallest particle size in micron s that the filter cartridge is capable of removing. For example, a 30 micron cartridge will remove particulates as small as 30 micron while a 5 micron filter cartridge will remove particulates as small as 5 micron . The lower the micron rating of the filter cartridge, the tighter the filter and the smaller the particle size it can remove.

For sediment filters, generally a “nominal” rating is used, meaning that a high percentage of particles of the rated size are removed. An “Absolute” rating means that >99.99% of the particles of the rated size are removed. Rainfresh ceramic cartridges have a 0.3 micron absolute rating, meaning that they remove > 99.99% of particles as small as 0.3 micron .

Rust is formed when dissolved iron (ferrous) oxidizes to a particle form (ferric). Homes on urban water supplies get rust from corrosion of old distribution piping which is common in many Canadian cities. Homes on private wells can have naturally occurring rust or through the well system. Rust is not considered as a health contaminant but is recommended to be removed for aesthetic reasons (taste, odour, colour, sediment and protection of plumbing devices such as water heater). Since rust is a particle, it can be removed by sediment filters. Homes on private wells that have high ferrous iron (dissolved) should consider a whole house iron reduction system.

A micron , also called micrometer, is a unit of measurement.

1 micron = 1/1000 mm (1/25,000th of an inch) is denoted by the letter µ.

Average human hair is about 75 micron in diameter and coarse dirt is about 40 micron . In filter cartridges, a micron rating refers to the smallest particle size in micron s that the filter cartridge is capable of removing. For example, a 30 micron cartridge will remove particulates as small as 30 micron while a 5 micron filter cartridge will remove particulates as small as 5 micron . The lower the micron rating of the filter cartridge, the tighter the filter and the smaller the particle size it can remove.

For sediment filters, generally a “nominal” rating is used, meaning that a high percentage of particles of the rated size are removed. An “Absolute” rating means that >99.99% of the particles of the rated size are removed. Rainfresh ceramic cartridges have a 0.3 micron absolute rating, meaning that they remove > 99.99% of particles as small as 0.3 micron .