Gravel, 1/2x1/4

Filtration performance starts at the bottom of the tank, and that is exactly where 1/2" x 1/4" filter gravel earns its place. Used as a support bedding beneath finer media in backwashing filters and water softeners, this graded gravel evenly distributes incoming water across the full diameter of the vessel, prevents fine media from migrating into the distributor, and keeps the underbed from channeling during both service and regeneration cycles.

Quality matters in support media, and this product is double-scrubbed to strip away clay, shale, and inorganic impurities before it ever reaches your tank. The result is a clean, high-purity, consistently sized gravel that will not introduce turbidity or contribute to off-color rinse water during startup. Because it is graded to a tight 1/2" by 1/4" size range, it nests predictably with finer grades above it, forming a stable, free-flowing foundation in residential, commercial, and industrial mineral tanks alike.

Why a graded gravel underbed matters

• Supports filter sand, carbon, anthracite, and other working media above the riser screen or distributor
• Promotes uniform upflow and reduces channeling during backwash
• Double-scrubbed to remove clay, shale, and inorganic fines for clean rinse water
• High purity helps prevent turbidity and off-color startup water
• Sized at 1/2" x 1/4" for the lower support layer of a multi-layer bed
• Inert composition will not alter treated water chemistry

When layering an underbed, coarser gravel is typically placed at the very bottom surrounding the distributor hub, with progressively finer grades stacked above before the working media is added. Following your control valve or tank manufacturer's recommended gravel volumes ensures proper hub coverage, the correct freeboard, and consistent flow at service rates. Over the life of the system the gravel rarely needs replacement, so investing in clean, well-graded support media at installation pays dividends in years of reliable filtration. Whether you are building a new iron filter, recharging a softener tank, or rebedding a commercial vessel, this gravel provides a dependable starting layer.

Stocking the correct gravel grade for your tank diameter ahead of time keeps a rebed or new build moving smoothly, since the support layer goes in before any working media. With the right finer grades and working media above it, this gravel helps your filter perform consistently for years.