2" Rubber drain plug - Ritchie 18219.
18219 2" Rubber drain plug. This part has replaced part 11443. Silicone drain plug with two bolts, one nut and two washers to form a tight seal. Used in the Thrifty King series, the WaterMaster 600 and 54D, EZFount, and Omni Combination Conversion.For assistance finding your parts call 1-866-991-2220