A common question we are asked at Puretec is “Why should I change my filters regularly?”. It’s a great question.

Using a filtration system for your mains or rainwater is a simple way to enjoy peace of mind around your household water. However, if you’re not changing your filters and lamps (on ultraviolet systems) regularly, they may no longer perform effectively.

What happens to filters over time?

To explain this more clearly, let’s talk about what happens to a filter as it gets older. Many filters have pores or media designed to trap or attract bacteria and contaminants like sediment, rust and odours. As these contaminants build up, water can struggle to pass through the filter. When this happens, flow may reduce and the water that does pass through may no longer be filtered as effectively.

Ultraviolet systems and lamp replacement

If you are using an ultraviolet system, the lamp also needs to be replaced every 12 months to ensure ongoing effectiveness. While the lamp may still be on after this time, if it’s not at full strength it will no longer be killing 99.9% of the bacteria in the water that passes through. Just because a lamp is illuminated does not mean it is delivering the level of performance it was engineered to provide.

Filter capacity and water conditions

All Puretec products are extensively tested to determine the appropriate capacity for each filter cartridge type. While capacity is measured under specific test conditions, the actual lifespan of each filter cartridge will depend ultimately on water conditions. For example, areas with higher sediment may need to be changed more frequently than areas with fewer contaminants.

Cleaning and reusing pleated sediment cartridges

Pleated sediment cartridges can be re-used by removing the cartridge and washing it down with clean water. The Puretec Filter Cartridge Cleaning Gun connects to a standard garden hose, with bristles that help to dislodge and loosen the sediment. It also has a compartment that is ideal for Puretec TankSafe™ for extra-effective cleaning. Once cleaned, the cartridge can be re-installed.

Pleated cartridges can generally be reused 3-4 times before they need to be fully replaced, or until they start to show signs of wear. Over time the pleats of the cartridge will start to roughen in appearance, the pores can open up and may start to allow larger particles through.

Installation and specialty cartridge considerations

Before installation, always read the installation guide and instructions provided with any filter cartridge. Specialty cartridges, such as nitrate removal filter cartridges require preconditioning before use and require regeneration once the capacity has been reached.