Chevron down icon Chevron down icon Zoom icon Click to expand Tap to zoom Check Valve Female/Female BSPT Threaded $ 5.61 CAD | / 1/2" - $ 5.61 CAD 3/4" - $ 8.91 CAD 1" - $ 9.77 CAD 1 1/4'' - $ 14.19 CAD Threaded Male Inlet Size 1/2" 3/4" 1" 1 1/4'' 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 Equal Threaded Brass Female / Female Connections.