The Pentair C21-2 is a Diffuser Ring. This ring is compatible with D-Series Self Priming Centrifugal Pump and Sta-Rite® ED Series Gas Engine Self Priming Centrifugal Pump. It is a genuine Pentair product.
Diffuser Seal Ring 1HP and 2.5HP
Price: $9.00
Aquamatic slider w/ screws
Price: $48.43
3/4" Line Regulator (325,000 BTU)
Price: $100.58
Cover Installation Bar, Professional, 36", Heavy Duty
Price: $106.01
O-Ring Strainer Lid Bs452a Hydrostar Plus Composite
Price: $25.61
Supaskimmer Leaf Basket (Basket Only, No Components)
Price: $24.72
Mechanical Seal For Waterco Pumps
Price: $23.86
O-Ring For Hydrostorm Main Body
Price: $9.31