MRC:
A feature of the item of supply which must be specifically recorded when the reference number covers a range of items.ZZZY
Reference Number Differentiating Characteristics:
Size 6 in. Valve kit consisting of, 2 - no. 2, gasket, top cover plate, 1 - no. 4, spring, main valve, 2 - no. 6, disc, main and check valve, 2 - no. 13, disc, upper and lower relief valve, 1 - no. 17, spring, relief valve, 1 - no. 19, diaphragm /set/, 1 - no. 21, gasket, clamp bolt, 1 - no. 24, spring, check valve, 1 - no. 25, gasket, relief housing
