Replacement holding tank sensor kit for the Thetford Tecma Silence Plus permanent RV and marine toilet. Includes one mid-level sensor and one top-edge (full) sensor with wiring harness. Supersedes Tecma part 36743.
The Thetford THT-PF.P133 (also listed as SKU 50120) is the replacement holding tank sensor kit for the Thetford Tecma Silence Plus permanent RV and marine toilet — the sensors that monitor the waste holding tank's fill level and signal to the toilet's control system when the tank is approaching or has reached capacity.
The kit includes two sensors: one mid-level sensor that indicates the tank is half-full, and one top-edge sensor that indicates the tank is full — along with the wiring harness that connects them to the toilet's control board. When these sensors fail, the toilet may display incorrect tank level readings or lose tank level indication entirely. This is a direct replacement for the earlier Tecma part number 36743. Compatible with the Tecma Silence Plus permanent toilet (April 2006 to present).
• 1x Mid-level tank sensor • 1x Top-edge (full) tank sensor • Wiring harness Confirm your Tecma Silence Plus model year (April 2006 or later) before ordering.
The Thetford Tecma Silence Plus is a macerating permanent RV and marine toilet — it uses a powerful, quiet pump to macerate waste and pump it to a remote holding tank, allowing flexible installation independent of the tank's location. The holding tank sensors in this kit give the toilet's control system visibility into tank fill level, which is how the toilet displays its "mid" and "full" indicators to the user. When replacing these sensors, refer to the Tecma Silence Plus service manual for sensor positioning and wiring harness routing specific to your installation.