5 5RV-SC Storm Collar Round Type B Gas Vent. The storm collar provides a seal to prevent water from leaking between flashing and pipe. It is used above the roofline and requires hi-temp silicone sealant on the inner edge. RV series offers round gas vent pipe and fittings for residential commercial and industrial applications. It features a snap together non-positional lock system die formed ends and eliminates the need for all cutting fitting and special engineering.
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