D-Type Keg Coupler S.S (includes 2 x Duotight 8mm 5/6" fittings)On SALE D Type Keg Coupler Full Stainless duotight 5 8" to 8mm push in Commonly referred to as the "Twist On Coupler" Includes: 1 x D Type Coupler with 5 8" Male Beer and Gas threads 2 x duotight 5 8" duotight to 8mm push in 1 x Non Return Ball or Torpedo check piece (Non Return Liquid) 1 x Gas Duck Bill valve (Non Return Gas) How to install Gas Duck Bill Valve Remove black EPDM washer inside 1 of the duotight push in fittings that you will use for