valve plate 52 includes two ribs 54 the ribs 54 ride in longitudinal grooves provided in the valve seat ring 56 attached to the ribs 54 is the drain valve facing 58 the drain valve facing 58 is made of rubber or a plastic material such as polyethylene a drain passageway 60 extends through the base 14 and the hydrant seat ring 56 the drain passageway 60 opens at one end to the exterior of the hydrant 10 and at the other end to the interior of the barrel 12 above the main hydrant valve seat 44 there may be one or more of these drain passageways 60 in the hydrant shown in fig2 there are two the drain valve facing 58 attached to the main hydrant valve member 42 is positioned in such a manner as to control water flow through the drain passage 60 thus providing a drain valve means that closes the passageway 60 when the main valve member 42 is open and opens the passageway 60 when the main hydrant valve 42 is closed referring now to fig3 the diffuser 61 includes a mesh screen 62 a perforated tube 63 and a diffuser connection 64 the mesh screen 62 completely encloses the perforated tube 63 and is mechanically sealed to the tube near or at.