Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Check Valve by Grobet Sale $10.80 | / SKU 14-179 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Check Valve Used to prevent dangerous reverse gas flow. For fuel gas regulator 9/16" LH.