Piston, w/O-Ring, to fit A-dec® Century® Water Coolant Valve Fits A-dec® Century® water coolant valve 1 each (A-dec® #38.0104.00) A-dec® and Century® are a registered trademark of A-dec, Inc. DCI has no affiliation with A-dec and A-dec has not authorized DCI replacement parts to be used on or in connection with A-dec® products.