29 CFR 1910.159 29 CFR 1910.159 29 CFR 1910.159 1910.159 - Automatic sprinkler systems. 29 CFR 1910.159 29 CFR 1910.159 29 CFR 1910.159 1910.159 – Automatic sprinkler systems. 1910.159 - Automatic sprinkler systems 29 CFR 1910.159 1910.159 - Automatic sprinkler systems. 29 CFR 1910.159 automatic sprinkler