20-inch standard blue shell

Special mechanical machining of the upper cover’s sealing surface ensures perfect flatness, allowing the O-ring to be evenly compressed, preventing leakage and thread stripping.

Upper cover positioning sleeve design ensures precise alignment of the filter cartridge, preventing eccentricity and avoiding bypass issues.

No mold release agents are used during production, eliminating concerns of drinking water contamination.

Two patented designs on the upper cover to prevent leakage:

Skirt design allows a single O-ring to block water leakage.

Raised-point design on the O-ring prevents displacement or misalignment.

All products comply with NSF testing standards, capable of withstanding high burst pressure and ensuring long service life, reducing the risk of rupture caused by water hammer effects.