Reference to: 23837 G18061-01, G18071-01, G18071X, G18081-01, G18082-01, G18082X G2601-01, G2601X, G2602-01, G2603-01, G2603X, G2605-01 G2902-01, G2902X, G2904-01, G2904X. When replacing the mechanical seal in your pump, it is necessary to ensure the proper seal washer is used to avoid damage to the pump. Sherwood recommended that all pumps be upgraded with the silicon carbide mechanical seal 23837, with the following exceptions: G1810, G1810-01, G1810x, G1811-01, G1815-01, G1816-01, which can only be fitted with the 23512 seal.