Take away nozzle or hose and horn assembly and visually inspect inside valve human body. (Chemical from the valve physique may possibly suggest which the extinguisher has long been partly discharged and will thus be recharged). The selection previous the B implies the scale of fire in square feet that https://self-catering-tented-acco41514.blogozz.com/28328793/5-simple-techniques-for-fire-equipment-servicing