Refill Case 20 Inch Standard 2.5″ Diameter – Customisable Filter Cartridge Shell

The Refill Case 20 Inch Standard 2.5″ Diameter is an empty, refillable cartridge shell designed for 20‑inch filter housings with a standard 2.5″ diameter. It allows you to customise your water filtration system by loading your own choice of media—such as granular activated carbon (GAC), resin, KDF, or Siliphos—to suit specific treatment needs.

Shell Features & Specifications

• Size: 20″ length, 2.5″ outer diameter (standard slim format).
• Material: Durable polypropylene body for chemical resistance and long service life.
• Refillable Design: The shell comes empty so you can customise the internal media to match your water‑quality goals.
• Pre & Post Screens Included: Built‑in screens protect your media from being flushed out during operation.
• Compatibility: Fits most standard residential and light‑commercial 20″ filter housings with 2.5″ diameter cartridges.

Why Use a Refill Case 20 Inch Standard 2.5″ Diameter?

When you use this cartridge shell, you can adapt your filter system to unique water challenges—whether it’s removing high chlorine, iron, or heavy metals, or adding remineralising media. Also, because the shell is empty, you reduce waste compared with disposable cartridges. In addition, the standard 20″ length means a higher media volume than compact filters, offering longer service life before replacement.

Applications & Installation Tips

• Use the shell in point‑of‑entry (POE) whole‑house systems or in large under‑sink/ countertop housings.
• Choose compatible media (carbon, resin, KDF etc.) to achieve your desired filtration performance.
• Install according to flow direction, check O‑rings, and rinse after filling.
• Monitor pressure drop; when flow slows or taste changes, open the shell and refresh the media.
• Store the shell in a cool dry place if not installed immediately.