3″ Clapper for Tank to Pump Castings Part No: 500021 Material: Stainless Steel Dimensions: 3" Diameter Weight (approx.): .8 Case Quantity: N/A List Price: N/A Stock: In stock Description3" Clapper for Tank to Pump Castings Categories Tank to Pump Stainless Steel Castings Download Part Drawing Use this clapper with the 500020 and 500205 Tank To Pump Castings.