As of 2016, websites such as Hayward-Pool.com, ManualsLib.com and ManualsOnline.com provide Hayward sand filter guide downloads for free. Users can access the manuals without signing up. Each of these sites offers guides for various sand filter models, and some may be more up to date than others.
On Hayward-Pool.com go to Support then select Manuals. Choose the type of pool, and select Filters to view the guides.
To find Hayward sand filter guides on ManualsLib.com, search for Hayward brand on the home page. Select Swimming Pool Filter option to display the available guides. Using the model number locate the right guide.
Hayward is a worldwide manufacturer of pool equipment for residential and commercial pools.