Shaft Seal for Pentair Whisperflo & Ultraflow Pumps PS-1000 Go to amazon.com Related posts How to find the best ps1000 seal for 2022? FeatureWorks on Whisperflo pool pumpWorks on Ultraflow pool pump DescriptionReplacement pump shaft seal for the Pentair Whisperflo and Ultraflow pool pumps, replacement part number PS-1000.