Pentair MasterTemp/Max-E-Therm 9-Bolt Combustion Chamber Lid Assembly (474958) thermproducts A weir door like this

A weir door like this is useful because it helps restore proper skimming action at the entry point of the assembly

The Stark gasket is designed for compatible Pentair THS filter grooved coupling applications where a dependable seal is needed

It needs a pack that matches the heater relationship from the start

This OEM 2-way diverter valve is a practical replacement for compatible pool and spa plumbing setups that need dependable manual flow control

Useful for pool repairs

Pentair MasterTemp/Max-E-Therm 9-Bolt Combustion Chamber Lid Assembly (474958) thermproducts A weir door like thisDesigned around Pentair equipment compatibility, this MasterTemp Max E Therm 9 Bolt Combustion Chamber Lid Assembly helps keep the original system architecture intact while addressing a worn or failed component. It is useful for targeted repairs where matching the correct model, rating, size, or connection style is more important than using a generic substitute. For MasterTemp and Max E Therm systems, a correct replacement supports safer