United Spas 1-3/16" HS Thermowell For 1/4" Bulb (TW107) spafilters A cartridge set is useful

A cartridge set is useful because it allows all of the filter elements to be replaced together

Keeping the valve connection consistent usually makes service cleaner and more efficient

PresAir Trol TinyTrol SPNO latching air switch

This type of part is especially useful when the original dial is broken

and PLAS35 references

United Spas 1-3/16" HS Thermowell For 1/4" Bulb (TW107) spafilters A cartridge set is usefulThe United Spas thermowell is designed for compatible applications using a 1 3 16 inch hole size and a 1 4 inch sensing bulb. Thermowells are useful because they provide a protected sensing location for the bulb while helping preserve proper placement within the system. This replacement is especially useful when the original thermowell is damaged, corroded, or no longer holding the sensing bulb correctly. Matching the correct hole size and bulb format