10 Best Gravel Types for Drainage (Pros Cons) | House Grail
· The 10 Types of Gravel for Drainage. 1. Pea Gravel. Pea gravel is generally about ⅜inch in size and is often called pea shingle. It's a very attractive gravel that comes in a variety of colors, including brown, blue, red, and grey. Pea gravel is very different from crushed stone since it is round and generally smooth.
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