Product Overview

The Intermatic T104M Mechanical Time Switch Mechanism is a dependable 24-hour timer designed to control pool pumps, spa equipment, lighting systems, motors, water heaters, and other electrical loads operating from 208 to 277 VAC.

This heavy-duty replacement mechanism provides automatic daily ON and OFF scheduling without the need for Wi-Fi, batteries, or digital programming. Once the mechanical dial and trippers are set, the timer repeats the same schedule every 24 hours. The built-in manual override also allows the connected equipment to be turned on or off without changing the programmed schedule.

The T104M is commonly used in swimming pool equipment systems because of its durable construction, simple operation, and dependable mechanical design. It is rated for loads up to 40 amps per pole and uses a double-pole, single-throw switching configuration.

This product includes the internal timer mechanism only. A metal or plastic timer enclosure is not included.

Key Features

• Genuine Intermatic replacement mechanism
• 24-hour mechanical scheduling
• Designed for 208–277 VAC systems
• Heavy-duty 40-amp-per-pole rating
• Double-pole, single-throw switching
• Built-in manual ON/OFF override
• Up to 12 ON/OFF operations per day
• One ON tripper and one OFF tripper included
• No batteries or digital programming required
• Compatible with many Intermatic T100-Series enclosures
• Suitable for indoor or outdoor installations when used in the proper enclosure
• Durable design for residential and commercial applications

Benefits

The Intermatic T104M provides reliable control of equipment that should not operate continuously. Scheduling a pool pump, lighting system, or motor can help reduce unnecessary operating time and improve overall equipment management.

The simple mechanical dial makes the timer easy to set and adjust. Unlike digital timers, there are no menus, displays, or wireless connections to configure. The manual override gives users immediate control when equipment needs to run outside the programmed schedule.

Replacing only the internal mechanism can also be more cost-effective than replacing the complete timer assembly when the existing enclosure remains in good condition.

Specifications

Common Applications

The T104M can be used with compatible:

• Swimming pool circulation pumps
• Spa pumps and equipment
• Outdoor and indoor lighting
• Electric water heaters
• Motors and fans
• Commercial equipment
• Agricultural equipment
• Signs and scheduled electrical loads

Installation Information

Turn off all electrical power at the circuit breaker before installation. Verify the incoming voltage, connected load, motor horsepower, and wire configuration before replacing the existing mechanism.

The T104M should be installed inside a compatible Intermatic enclosure. Wiring must be connected to the correct line and load terminals according to the timer instructions and applicable electrical codes.

Installation by a qualified electrician or experienced pool professional is strongly recommended.

Confirm Before Ordering

Verify that:

• Your electrical system operates between 208 and 277 VAC.
• You need the timer mechanism only.
• Your existing enclosure accepts a T100-Series mechanism.
• Your equipment load does not exceed 40 amps per pole.
• Your application requires a DPST timer.
• Your existing timer is not a 120V T101M model.

Warranty Information

The Intermatic T104M is covered by the manufacturer’s limited warranty against qualifying defects in materials and workmanship. Damage caused by incorrect voltage, improper wiring, overloading, moisture intrusion, corrosion, misuse, or unauthorized modification is not covered.

Customer Q&A

Does this include the enclosure?
No. The T104M includes the internal timer mechanism only.

Can it control a pool pump?
Yes, provided the pump voltage, amperage, and horsepower are within the timer’s ratings.

Can the equipment be turned on manually?
Yes. The built-in override allows manual ON and OFF control.

Is this a replacement for the T101M?
No. The T101M is generally used for 120V systems, while the T104M is designed for 208–277V applications.