This Is A Hayward Top Mount Valve Hayward# SP-716-21 (SP071621) Clamp On Valve, 2" MPT Ports. Valve Color Is Black with Round Cover, Attached With 10 Nuts & Bolts. Model SP 715 21 On Cover, "Sp-716-A13" On Body Round Pipe Comes Out Bottom, 2" Long, 1.9" Id  Same as SP071620T..but does NOT come with Clamp or O'Ring.  Must order separately

Clamp Flange Diameter: 8".
Height: 13-1/8" (Including Pipe But Not Handle)

Application

S310, S310T2, S310T

Includes

Sight Glass With Gasket 1/4" Plug Installed In Pressue Gauge Hole