Safety chains or suitable safety devices shall be used at connections to machines of high pressure hose lines of 3/4 inch inside diameter or larger, and between high pressure hose lines of 3/4 inch inside diameter or larger, where a connection failure would create a hazard.
4 Va. Admin. Code § 25-40-1210
Statutory Authority
§§ 45.1-161.3, 45.1-161.294 and 45.1-161.305 of the Code of Virginia.