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TSM Isolator valve isolator module in white plastic enclosure, front and side view showing wiring terminals and label

TSM Isolator Valve Module — 24VAC Controller Protection

Brand: TSM
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$87.95
$65.97
SKU ISOLATOR

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TSM Isolator provides continuous protection for 24VAC irrigation controllers when operating multiple controllers on the same system. It prevents controller burnout and malfunctions caused by phasing, polarity, or feedback from shared wiring.

  • Compact metal/poly enclosure: 3.625" x 2" x 1"—fits easily inside controller boxes or nearby enclosures.
  • Input/Output: 24 VAC; nominal power 33 mA; switch time ~7 ms for fast response.
  • Switch capacity: 8 Amps per output; rated for more than 30,000,000 operations.
  • Wiring and installation: use 18 AWG wire; can be installed any distance from the controller.
  • Durability and warranty: built to last with a 1-year full replacement warranty; not waterproof—use in a waterproof enclosure outdoors.

Compatible with all 24VAC controllers, including smart controllers. Install one Isolator per controller to safely operate multiple controllers on a single sprinkler system. See included installation instructions and product overview for wiring diagrams and mounting details.

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Frequently Asked Questions

What does the TSM Isolator do on my sprinkler system?
Protects 24VAC controllers from interconnection faults, preventing burnouts and malfunctions when multiple controllers share wiring.
Will it work with smart controllers like Rachio?
Yes. It works with all 24VAC controllers, including smart controllers, as long as the system supplies 24 VAC power.
How is the Isolator installed and wired?
Connect to the controller's 24VAC output and master/common per the installation guide; use 18 AWG wire and mount inside an enclosure if outdoors.
Does the Isolator require maintenance or include a warranty?
No routine maintenance. It includes a 1-year full replacement warranty for defects; not waterproof—use in a waterproof enclosure outdoors.

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