Mechanical Seal, 304 Stainless Steel + Silicon Carbide Cr Shaft Size 16Mm Cartridge Seal for Grundfos Pump and Water Pump for Cr Series Pumps: Amazon.com: Industrial & Scientific
Grundfos UP15-29SF 1/12 HP 115-Volt Stainless Steel 1-Speed Circulator Pump 59896771 - The Home Depot