PR-10 JB Industries Replacement Cover Assembly and Drain Valve. Replacement cover assembly includes sight glass and drain valve. For DV-4E and DV-6E. For DV-3 and DV-5 manufactured prior to January 2001. Cover Assy For New Eliminators (Gray Hammer Tone Finish) Note: Old Style Black Covers For Eliminators Are Not Available. New Style Will Fit DV127- DV3-DV5- DV85c- All DV3e- DV4e- DV6e. Does not include oil fill plug.