PresAirTrol Threaded Stem SPDT Pressure Switch

Model: PM11120A – 21 Amp Rating

Product Overview

As a retailer of hot tub spa parts, I’m featuring this versatile PresAirTrol pressure switch with threaded stem design. This dual-mount capability switch offers excellent installation flexibility with its adjustable pressure settings and high current capacity.

Key Features

• 21 Amp rating
• Adjustable pressure range (1-5 PSI)
• SPDT (Single Pole Double Throw) configuration
• Dual mounting options (1/8″ NPT or 1/2″ panel)
• Threaded stem design
• Cross-referenced with Hergair #6741

Technical Specifications

Specification	Detail
Manufacturer	PresAirTrol
Model Number	PM11120A
Amperage Rating	21A
Pressure Range	1-5 PSI (Adjustable)
Primary Connection	1/8″ NPT
Panel Mount Size	1/2″
Switch Type	SPDT
Design Type	Threaded Stem
Cross Reference	Hergair #6741

Installation Features

• Dual mounting flexibility
• 1/8″ NPT direct connection option
• 1/2″ panel mount capability
• Threaded stem for secure mounting
• Adjustable positioning

Performance Benefits

• Field-adjustable pressure settings
• High current handling capacity
• Versatile SPDT switching
• Reliable operation
• Precise pressure monitoring

Application Uses

• Spa control systems
• Equipment protection
• Flow monitoring
• Safety circuits
• Panel-mounted installations
• Direct-threaded applications

Design Advantages

• Versatile mounting options
• Adjustable pressure threshold
• Professional-grade construction
• Stable switching mechanism
• Flexible installation configurations

Adjustment Features

• Tool-accessible adjustment mechanism
• Wide 1-5 PSI range selection
• Precise calibration capability
• Stable pressure settings
• Consistent switching points