RED FLINT GRAVEL 1/2 X 1/4 50 BOX

Red Flint gravel has long been a trusted name among water treatment professionals, and this 1/2" x 1/4" graded support gravel carries that reputation into your filter tank. Packaged by the box for residential and light commercial builds, it provides the underbed layer that keeps finer filtration media properly seated above the distributor, where it belongs. Known for its hardness and rounded grain structure, Red Flint material holds its grading through countless service and backwash cycles rather than breaking down into fines.

The role of support gravel

In a backwashing filter or softener, the gravel underbed does the quiet but critical work of spreading incoming flow across the full diameter of the tank. This even distribution prevents channeling, protects the riser screen from fine media intrusion, and helps the bed re-settle cleanly after each backwash so the system returns to service evenly. Without a proper gravel base, even premium working media can short-circuit, lose efficiency, or escape into downstream plumbing.

• Graded 1/2" x 1/4" for the lower support zone of a multi-layer bed
• Hard, durable Red Flint composition resists breakdown and abrasion over time
• Inert and chemically stable, so it will not affect treated water quality
• Distributes flow evenly to reduce channeling and prevent media loss
• Helps the media bed re-settle uniformly after each backwash cycle
• Works in whole-house, well water, softener, and commercial mineral tanks

For best results, layer your gravel from coarsest at the bottom around the distributor to finest just below the working media, following the tank or valve manufacturer's volume guidelines for your vessel diameter. Take care when adding media on top of a fresh gravel bed not to disturb the distributor hub. Because Red Flint gravel is naturally hard and remains stable through repeated regeneration and service cycles, it gives your filtration system a long-lasting foundation that you will likely never need to touch again for the life of the tank. It is the dependable base layer behind well-built media filters and softeners.

Because support gravel is a one-time investment that rarely needs replacing, choosing a clean, hard, well-graded product like Red Flint at installation is well worth it. Paired with the right working media, it gives a filter or softener a stable base that performs reliably for years.