Slim White NRO Sump, 2.5" x 10-1/4"

The Slim White NRO Sump measures 2.5" x 10-1/4" and serves as the lower housing bowl for slim-line reverse-osmosis and filtration cartridges. Manufactured by Pureteck in a clean white finish, this NRO-style sump holds a standard slim cartridge and threads into a matching filter cap to complete the housing, making it an ideal replacement or build component.

• NRO-style sump in a clean white finish
• Sized 2.5" x 10-1/4" for slim-line cartridges
• Accepts standard 10" slim filter cartridges
• No integral bracket; no pressure relief
• Threads into a compatible filter cap
• From Pureteck for dependable filtration housings
• Pairs with a compatible cap to form a complete housing

The Role of the Sump

In a filter housing, the sump is the cylindrical bowl that holds the cartridge and contains the water as it passes through the filter element. This slim white sump is designed for standard 2.5" diameter, 10" length cartridges commonly used in under-sink, reverse-osmosis, and point-of-use systems throughout the home. Its NRO configuration pairs with a compatible cap to form a complete, sealed housing around the filter, channeling water through the cartridge for effective treatment.

Whether you are building a new filtration station or replacing a cracked, cloudy, or worn bowl, having the correct sump on hand keeps your system watertight and serviceable. To assemble, seat a fresh O-ring in the cap, insert the cartridge into the sump, and thread the sump onto the cap until snug, taking care not to cross-thread or over-tighten, which can damage the threads or distort the seal. Note that this model does not include an integral mounting bracket or a pressure-relief feature, so plan your mounting and servicing accordingly. With Pureteck quality behind it, this slim sump is a reliable component for residential water-treatment housings.

Inspect and replace the O-ring whenever you change cartridges, and keep the sump clean to ensure a reliable seal every time. With those simple habits, this slim white sump will continue to house your filter cartridges securely, helping your under-sink or RO system deliver clean water reliably for the long term. Keeping a spare on hand means you can address a cracked or worn bowl quickly and get your filtration system back in service without delay.