Part 2: Where should the sensor go?

Part 2: Where should the sensor go?

🌊 Part 2: Where should the sensor go?

Series Part 2 of 8: Houston 3003.4 vs. ASME A17.1 – Pit Flood Detection

Both Houston 3003.4 and ASME A17.1 require a sensor. But where exactly should it be located?

đź“Ť Houston 3003.4:

“Shall include a water sensor installed in the hoistway below the landing of the lowest floor served by the elevator.”

📏  ASME A17.1:

“The elevator shall be equipped with a flood detection means… located in the pit at a location between 6 in. and 12 in. above the pit floor.”

🔍 Summary:
Houston gives building owners flexibility—letting sump pumps handle initial water before triggering flood protection. It doesn’t lock in a specific sensor height, making it easier to accommodate different manufacturers and site conditions.

A17.1 is more prescriptive, requiring the sensor to be mounted 6–12 inches above the pit floor.

➡️ Up next: How should flood alerts be communicated? 🔔

  • A100-PFD Pit Flood Protector

    When water is detected in the pit, the pit flood protector moves the elevator and its passengers to pre-determined safe floor.

  • A100-PFS Pit Flood Switch

    A robust, waterproof float switch for detecting water or other liquid intrusion into the elevator pit.