Ceramic Water Filtration Balls & Thimbles

Ceramic Water Filtration Balls & Thimbles

Wheeler Bottom Filtration Balls & Thimbles
Wheeler Bottom Water Filtration Balls

AKRON Porcelain & Plastics Company serves the Water Filtration Industry by supplying ceramic spheres for Wheeler filter bottoms. Akron has NSF Certification and is a member of the American Water Works Association (AWWA).

The Wheeler Filter Bottom for gravity filters has been recognized for many years as a most efficient and durable filter bottom.

The Wheeler Filter Bottom, monolithic type, consists of a reinforced concrete floor slab, or “false” floor, supported on piers about 22″ above the floor of the filter box. Inverted pyramidal depressions located at 12″ intervals throughout the Wheeler Bottom each contain (5) 3″ porcelain spheres and (9) smaller porcelain spheres. A porcelain thimble having ¾” diameter clear opening permits passage of water through the Bottom.

Contact sales@akronporcelain.com for your Wheeler Bottom Filtration project today!

Wheeler Bottom Filtration Spheres Insulation
Wheeler Bottom Water Filtration Insulation


During backwashing, the direction of flow is reversed. The water flows from the wash water pipe into the chamber at the bottom of the filter up through the ¾” porcelain thimbles and diffused by the porcelain spheres before entering the lower gravel layer. Absolutely uniform wash water distribution, for which the Wheeler Bottom is noted, is of utmost importance in maintaining clean, efficient filters, free of mud balls and caking.

Sphere SizePieces Per CartonCarton Weight
3″5063 lbs.
2″18368 lbs.
1-3/8″60069 lbs.
1-1/4″80072 lbs.

Thimble SizePieces Per CartonCarton Weight
Water Absorption, %1.0
Specific Gravity2.4
Resistance to Impact, in./lbs.2.4
Tensile Strength, lbs./sq. in.2,500
Compressive Strength, lbs./sq. in.40,000
Flexural Strength, lbs./sq. in5,000

Industries Served

Electrical Distribution, Foundry, Major Appliance, Commercial Lighting, Water Filtration, Medical, Oil & Gas, Automotive