Filter Gravel

Filter GravelFilter gravel is used as a support media to filter sand and coal in water filters. 
For maximum efficiency, filter gravel must possess the necessary attributes of hardness and be rounded rather than angular. 

River Sands Filter Gravel is a hard, round, predominantly quartz aggregate. The filter gravel, like filter sand, contains hard durable particles with a slow breakdown rate. This helps to prolong filter media life. 

The gravel is screened into three standard sizes which effectively supports the filter media.

Our filter gravel is available in bulk bags or 20kg bags.

Note:- High quartz filter sand and filter gravel is available on request



Physical Properties Typical Results
Specific Gravity 2.65
Acid Solubility 1.0% in 20% HCI over 24 hours
Physical Size to order
Size Tolerance 8% undersize and 8% over


Standard Sizes

Product Number Nominal Size (mm)
W5 3 - 6
W4 6 - 12
W3 12 - 25



UnderWater World has been doing business with River Sands Pty Ltd for a number of years and have always found them to be reliable and efficient, timely and cost effective. The quality of their filter media products has always met our high expectations and it has been a pleasure to have them as a supplier.

Neil Swann, Marketing Manager, UnderWater World, Mooloolaba.