Item #: 2-PT11120A
Retail Price: 34.43
Our Price: $30.99
Availability: Usually leaves our warehouse within 1-2 business days
Pres-Air-Trol 21 amp pressure switch PT11120A has a Radial Mount for panel mounting with a 1/8” slip barb hose CENTER water connection, and three wire terminals for common, NC and NO wires. Threads shown in picture are used to mount the pressure switch to chassis or panel, using lock nut, also shown. Hose is pushed onto spigot inside the threaded mounting nipple. Adjustable pressure switch is Normally Open and comes factory set at 1 psi but can be adjusted with a hex key, with a clean filter, to meet a variety of system pressures, as low as 1 psi up to 5 psi. Made in the USA by PresAir.
Pressure switches are used on spa, tub and bath heaters to measure the amount of water pressure inside of the heater, as an approximation of water flow. Pressure switches are safety devices intended to prevent heater damage and overheated water hazards. If your pressure switch is causing the heater to shut down, look for causes of low flow in and out of the heater, and remove the spa filter temporarily to improve flow. Pressure switches do fail eventually (which is why sell replacements), but first assume a flow problem, and not a switch problem.
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