Spa Components 4.0kW [15" x 2"] FloThru Heater [PS/TI] [Brett Aqualine] (B24040E) grundfos Latching air switches are useful

Latching air switches are useful because they allow a control state to remain engaged until the next intended activation changes it

A terminal block is useful because it helps keep wiring cleaner

feels rough when turning

10" round grate

A tube like this is useful because it helps transmit the pressure condition to the related control component

Spa Components 4.0kW [15" x 2"] FloThru Heater [PS/TI] [Brett Aqualine] (B24040E) grundfos Latching air switches are usefulThe Spa Components 4. 0 kW flo thru heater is designed for compatible 2 inch by 15 inch heating applications associated with Brett style systems and a PS TI configuration. Flo thru heaters are useful because they provide direct in line heating while preserving the plumbing path and heater layout the spa system was built around. This replacement is especially useful when the original heater no longer produces dependable heat, has failed electrically,