Sand Filter

Sand filters are a trusted solution in New Zealand’s stormwater management systems, designed to remove sediment, nutrients, and pollutants from runoff before it reaches our waterways. These filters play a vital role in protecting the environment and helping sites meet council compliance requirements.

Stormwater flows through layers of sand, where contaminants are trapped and filtered out. Beneath the sand layer, a filter cloth and underdrain system further support water treatment by preventing fine particles from passing through and ensuring efficient drainage.

Regular sand filter maintenance is essential to prevent clogging, maintain filtration efficiency, and avoid system failures. If the sand layer, filter cloth, or underdrains become blocked or overloaded, water cannot flow freely—leading to flooding, reduced pollutant removal, and non-compliance with environmental standards.

At Dutton Stormwater, we provide expert sand filter maintenance services across New Zealand. Our team inspects, cleans, and restores sand layers, filter cloths, and underdrain systems to keep your stormwater filter operating at peak performance. For underground sand filters, maintenance will require confined space entry, which is performed by our specially trained technicians following strict safety protocols.

Sand filters typically require maintenance every six to twelve months, depending on site conditions and pollutant loading. During each service, we assess the filter’s condition and includes a job summary with any recommendations in your service report.