Darlly 80752 FC 1280 C 8600 PA80 Spa Pool Filter Cartridge audio A properly selected Invensys thermostat A properly selected Invensys thermostat contributes to more dependable temperature regulation and helps preserve the intended control layout of the supported system A properly matched topside like this is especially appealing when the owner wants both functional restoration and a more attractive finished control area the system can lose the steady filtration support it should provide This type of replacement is especially useful when the filter housing remains serviceable and the cartridge itself is the main wear item