Pressure shut-off switch, 1/4 inch John Guest, 40 p.s.i. The 40 p.s.i. shut-off switch is recommended for use with a booster pump when the existing supply pressure is below 50 p.s.i.

Pressure shut-off switch, 1/4 inch John Guest, 60 p.s.i. The 60 p.s.i. shut-off switch is recommended for use with a booster pump when the existing supply pressure is below 50 p.s.i.

Pressure shut-off switch, 3/8 inch John Guest, 60 p.s.i. The 60 p.s.i. shut-off switch is recommended for use with a booster pump when the existing supply pressure is below 50 p.s.i.