Faema E-91/Due Steam Valve Piston Replacement piston for the steam valve on Faema E-91 and Due models. Note that the gasket this piston seats against is sold separately. COMPATIBILITY Fits: Faema E-91 and Due steam valve assemblies Works with: the plane gasket, part F_137 (not included, purchase separately) INSTALLATION Standard valve teardown - order the F_137 gasket at the same time to avoid a second trip into the valve. PRO TIPS Don't skip the F_137 gasket - installing a new piston against an old, hardened gasket is the most common reason for a steam valve to still weep after this "repair."