- For 505, 601-605, and 624 Balboa Systems only! The spas were built in the 1980's.
- Do not use this sensor on 700 or 800 Systems or newer 600, 600S Systems.
- Uses 6540-228 O-Ring (sold separately).
Spa covers, filter cartridges that are used or have been wet, spa equipment packs, heaters and any electrical items (including but not limited to: circuit boards, spa control panels, contactors, switches, sensors, speakers, transformers, pumps and motors) are a FINAL SALE. Manufacturer's warranty still applies and can be returned for warranty only. Maximum manufacturer's warranty on electronics is 6 months.