Response to Hi, Frank. The units are identical, however, the W3925ADC models are specifically for online retailers. This will let Hayward know if you purchased your unit online or at a retail store. 

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.