New Check Valve marked CV08-20. This is used on a few brands and has a few parts #'s
44334 Western Defender, Suburbanite, HTS, Impact UTV, MVP Plus, MVP3
44333 Fisher HS, Homesteader, HT, XV2, XtremeV, Trailblazer UTV
48287 Blizzard 7800LT, 8000LT, 8600SW, 7600HD, 8000HD, 8600HD, 9000HD
48287 Snowex UTV plows, HDV, 7600RD, 8000RD, 7600HD, 8000HD, 8600HD, 9000HD, 8600SW, 8100PP 8611PP
On the V plow this can loosen up so they use a lock ring with it part # 44369.
Placement is different on each pump, you should check your specific parts breakdown for location.