Pentair Sta-Rite Max-E-Therm SR300 Copper Heat Exchanger (77707-0243) filters When one end dimension or

When one end dimension or opening style differs from more common cartridges

This replacement is especially useful when the original impeller is broken

Filter cartridge pack for compatible spa and pool applications using SR400 and S7M400 references

Genuine Hayward part TVX7000BA

The caddy is especially useful for handling

Pentair Sta-Rite Max-E-Therm SR300 Copper Heat Exchanger (77707-0243) filters When one end dimension orA copper heat exchanger is one of the most important components in a Max E Therm SR300 heater, transferring heat from combustion to the pool or spa water. This replacement is used when the existing exchanger is leaking, scaled, damaged, or no longer serviceable. Because heat exchanger work involves water, combustion, and safety systems, the repair should be completed by a qualified technician who can inspect the cause of failure and verify operation