Sprinkler Systems in the UK: BS 9251 vs BS EN 12845

Understanding the difference between residential and commercial sprinkler standards is essential for correct specification.. Two Sprinkler Standards BS 9251 — Residential and domestic sprinkler systems BS EN 12845 — Commercial/industrial fully automatic sprinkler systems BS 9251 Residential Sprinklers Designed specifically for dwellings: Lower flow rates than commercial systems Concealed or flush sprinkler heads available for aesthetics Can be fed from domestic water supply in many cases Mandatory in Wales for all new dwellings Mandatory in England for buildings over 30m BS EN 12845 Commercial Sprinklers Designed for commercial/industrial buildings: Higher flow rates and larger coverage areas Requires dedicated water supply (tank + pump typically) Hazard classification determines design parameters Third party certification by LPCB essential For sprinkler system design, contact us.