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  • WaterCop WCDFST — Wireless Low Temperature Sensor Specifications

    September 08, 2026 2 min read

    Product specifications for the WaterCop WCDFST Wireless Low Temperature Sensor, which triggers a WaterCop Classic shut-off valve when pipe temperature drops below 34°F.

    Full text manual (for reference)

    Product sheet for the WaterCop® WCDFST Wireless Low Temperature Sensor — a freeze-detection sensor that works with the WaterCop® Classic system to reduce water damage from frozen, burst pipes.

    Overview

    As water pipes freeze, ice inside the lines can cause them to expand and burst or pull away from fixtures. When temperatures warm enough to thaw the ice, water flow is restored — often in the form of hundreds of gallons rushing out of the failure point directly into the property. The WCDFST Low Temperature Sensor clips directly onto a pipe (up to ¾" diameter) and constantly monitors pipe temperature; left unattached, it still monitors ambient temperature. If pipe temperature falls below 34°F, the sensor sends a wireless alert to the WaterCop® Classic control valve, which immediately shuts off the main water service to minimize damage from potentially freezing and bursting pipes (or excessive temperatures).

    Low Temperature sensors can't prevent pipes from eventually freezing and bursting, but they can help mitigate catastrophic loss and damage when the pipes eventually thaw and water flow is restored. WCDFST sensors can be added to any existing WaterCop® Classic system, or purchased as part of a new system installation.

    Features

    • Consider monitoring pipes highly susceptible to freezing and bursting, such as those feeding outdoor garden hose fixtures, or pipes in exterior walls, attics, crawl spaces, or other lightly insulated areas of the home
    • Mount the sensor clip onto the pipe within 12" of an exterior wall
    • User-adjustable digital security codes
    • Clip directly to the pipe, or hang to measure ambient temperature instead
    • Multiple WCDFST sensors can be added to any WaterCop® Classic system
    • Powered by two AA alkaline batteries
    • Low battery warning chirp
    • Optional WPA power adapter available (for AC power instead of batteries)

    While perfect for northern-tier states, Low Temperature sensors also provide proven protection for "milder-climate" homes that lack sufficient insulation to withstand unseasonably cold weather.

    Ordering Information

    For Existing WaterCop® Classic Systems

    • Part No: WCDFST — Wireless Low Temperature Sensor
    • Optional Accessory: WPA Power Adapter

    For New Installations

    Step 1 — Select the appropriate shut-off valve by size (Lead Free, NSF/ANSI 372):

    Size (FNPT) Part No.
    ½" WCVLF ½
    ¾" WCVLF ¾
    1" WCVLF 1
    1¼" WCVLF 1¼

    Step 2 — Add WaterCop® Classic Control Motor and Receiver: Part No. WCDACT

    Step 3 — Add WaterCop® Classic accessories as needed:

    Item Description
    WCDFST Low Temperature Wireless Sensor
    WCDFS1 Single Probe Wireless Leak Sensor
    WCDFS2 Dual Probe Wireless Leak Sensor
    WCDR Range Enhancing Repeater
    WPA Sensor AC Power Supply (Leak & Temperature Sensors)
    RS100 Wired Water Control Wall Switch
    CBL50 Valve/Switch Interconnect Cable (50 ft.)
    CBL100 Valve/Switch Interconnect Cable (100 ft.)

    Lead Free NSF/ANSI 372 refers to the wetted surface of pipe, fittings, and fixtures in potable water systems having a weighted average lead content ≤ 0.25%, per California Health & Safety Code (116875) and Vermont Act 193.

    Manufacturer

    WaterCop® — visit watercop.com or call 800-545-3636 for more information or to order. Lead Free & Made in the USA.