Response to Hello Charles.  The Pump Shaft Seal PS-1000, Heavy Duty (Saltwater Pools) - PS-3865 is a compatible replacement for the Pentair Whisperflo WF-26 part 0717345. 

An image is worth 1,000 words! Add an image or two to your comment to help ensure it is understood accurately.

Yes, please email me exclusive discounts, swimming pool tips and helpful how to guides. This comment may be posted on a public site. Do not include: HTML, references to other retailers, pricing, personal information, or any profane, inflammatory language.