HVAC: Related Service Occupational Codes may include but are not limited to 001797, 003005, 003177, 003179, 003651, 003653, 1120, 1161, 1169, 120A, 12B, 12K, 13B, 19D, 19K, 2A612, 2A632, 2A652, 2A672, 2A692, 2A6X2, 2M013, 2M033, 2M053, 2M073, 2M0X3, 3E111, 3E131, 3E151, 3E171, 3E1X1, 3E490, 4223, 4228, 4245, 4250, 4260, 51L, 52C, 6073, 6074, 6104, 6199, 6499, 68W, 702, 742B, 881A, 915A, 919A, 91B, 91C, 91J, AS, B23A, DC, EN, F17A, F18A, MK, MM, MMA, Q31A, Q53A, U10A, U14A, U17A, UT. Plumbing & Waterworks: Related Service Occupational Codes may include but are not limited to 001519, 001797, 003004, 003556, 1120, 1169, 1171, 120A, 12B, 12H, 12K, 1302, 1371, 13B, 19D, 21K, 313, 3E411, 3E431, 3E451, 3E451A, 3E471, 3E471A, 3E490, 3E4X1, 4205, 4230, 4250, 4260, 4340, 4952, 4999, 51K, 6199, 704, 748B, 91B, DC, FC, FCA, HT, MK, MM, MMA, U52A, UT.