Extra heavy-duty smooth white vinyl. Provides excellent resistance to odor permeation and (FDA) potable water fill. Also for critical bilge, drain scuppers, live wells, etc. Hard PVC helix gives good flexibility and bend radius. Don‚Äôt use with alcohols, anti-freeze, petro-chemicals or solvents. Self draining installations are recommended. Op temps: +10° to +140° F (-12° to +60°C).