Products › Check Ball for Sanke Coupler Image 1 of 1 Check Ball for Sanke Coupler $2.50 Replacement plastic ball for check valve assembly on Sanke couplers. Quantity: Add To Cart Added! Replacement plastic ball for check valve assembly on Sanke couplers. You Might Also Like Check Ball Retainer for Sanke Couplers $3.00 Probe Washer for Sanke-D Keg Coupler $2.00 Body Washer for Sanke-D Keg Coupler $2.00 Swivel Nut and Barb for Flare Fitting $5.00 Beer Washer - Gasket for Shanks and Tailpieces $1.00