Rancilio Copper Washer for Silvia, 11x7x1.5 Compatibility
This washer fits between the boiler and the expansion valve (OPV) and fits the Rancilio Silvia. Genuine Rancilio part number 36240006. You will need 2 of the copper washers. Rancilio recommends 1 of the 11x7x1 and 1 of the 11x7x1.5. It varies from Silvia to Silvia, so J.L. Hufford recommends purchasing 2 of each, as the cost is minimal. The 11x7x1mm washer is also available.