Hayward VL Series O-Ring (VLX4004A) switches and this Jacuzzi Sandstorm TM31

and this Jacuzzi Sandstorm TM31 Tank Base is designed for compatible applications where the original base has cracked

Helps restore maintained-state switching behavior

and 207A heater applications where the supported thermal-regulating assembly needs replacement

A flow switch helps verify that water is moving through the system before heating is allowed to operate

The Waterway 310-1880 wet end is designed for compatible 1

Hayward VL Series O-Ring (VLX4004A) switches and this Jacuzzi Sandstorm TM31The Hayward O ring is designed for compatible VL Series applications where a key sealing point needs dependable replacement. An O ring like this is useful because it helps maintain a cleaner seal between joined components, supporting more reliable equipment performance and stronger assembly integrity. This replacement is especially useful when the original O ring is flattened, brittle, cracked, or leaking. Replacing it can help restore the condition