Pentair Manifold Internals 400K BTU | 77707-0209 Quote They also have grooves on

They also have grooves on the backside where the springs are to be installed that helps the movement of the flaps

Positive-Lock Handle: Allows for smooth

Upgraded spring and locking tab ensure reliable pop-up

reassemble any other components and check the pump for proper alignment and function

Pentair Manifold Internals 400K BTU | 77707-0209 Quote They also have grooves onPentair Manifold Internals 400K BTU 77707 0209 The Pentair 77707 0209 Manifold Internals kit is a complete internal replacement set for 400,000 BTU Pentair MasterTemp and Sta Rite Max E Therm pool heaters. This OEM kit includes essential components that help restore proper water flow and heat distribution within the heaters manifold system. Features: Internal component kit for 400K BTU models Includes bypass valve, spring, and internal manifold