Grid Controls M-310 Flow Switch [25A] [2" Slip] (57-F4-3135-T02) nutsboltsscrews This type of component is

This type of component is especially useful when the spa is designed around both therapy-pump outputs and a dedicated circulation feature

flow dynamics

and this Jacuzzi TM31 assembly is designed for compatible applications where the original parts have worn out

2 inch slip Smart Check valve from Magic Plastics with 1/2 pound water setting

Grid Controls M-310 Flow Switch [25A] [2" Slip] (57-F4-3135-T02) nutsboltsscrews This type of component isA flow switch helps verify water movement in a compatible system before downstream equipment operates, and this Grid Controls M 310 version is a 25 amp model with a 2 inch slip connection using the 57 F4 3135 T02 reference. This style is useful where reliable flow sensing is needed within a larger plumbing line and a more robust switch rating is preferred. The 2 inch slip fitting gives this switch practical value because it is intended for direct