3/4" Drain Rock

Washed, crushed limestone aggregate that is used for drain rock and concrete aggregate applications, this material has been tested and is suitable for use in septic sytems. These C33 concrete aggregates conform to ASTM C33 coarse aggregate requirements for concrete use. It has been tested and found to be innocuous to ASR (alkali silica reactivity). It has also been tested for, and shows excellent results on LA abrasion, sodium sulfate, and cleanliness tests.