Repair or maintain your M-Pump with the proper replacement parts. This is a replacement diaphragm for M-Pumps with a single central hole. If you have an L or B pump, they require a different diagram with 3 or 4 holes. When changing your diaphragm it’s always recommended to change the duckbills at the same time. Part numbers: Sealand numbers: 600342419 / 342419 Legacy number: 385311822 / 311822 Dometic SKU: 9108690240
