Morco FW0547 heat exchanger washers are suitable for use with Morco D51B, D51B-B, D51B-C, D51B-E, D61B, D61E, G11E, G101B-B, G101B-C and G111E water heaters.
These washers are made of black nylon and will fit 3/8″ BSP threads. Sold per pack of 10 washers.