Sierra Shields VAC Extra HD/Comm Hose w/ FDA Liner 3/4"Sierra Shields Vac Extra Heavy Duty/Commercial Grade Hose has an FDA formula PVC with a white vinyl helix. The Vac. hose is rated for full vacuum and is resistant to mild chemicals and saltwater. The commercial hose features a smooth cover.Specifications: I.D.:; 3/4" or 19.1mm; Bend Radius: 3" or 76.2mm; Wt. "C": 16; Vac Rating: 28; Application: This hose is primarily used to bilge pump intake and discharge, potable water tank fill; This hose is also used to drain (sinks, shower, and scupper), livewell intake & drain, & sanitation; This hose is utilized for below the waterline connections; Note: Do not use ethylene glycol based antifreeze in hose. Do not use in pressurized water systems.