Groco Waste Holding Tank Level Monitors

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Product Description

TLM Series uses simple and reliable technology (floats) to indicate tank level in fresh water or waste holding tanks.


  • The gasketed indicator panel is suitable for wet locations such as combination shower/head compartments. The sending unit screws into any 1-1/2" NPT threaded tank-top opening.

  • If there is no 1-1/2" NPT opening available, TLM can be installed into a 2-1/2" hole cut into the tank top. Installation hardware is included.

  • Level indications are 1/4 full and 3/4 full.

  • A 20-amp momentary switch is provided to activate a macerator pump.

  • Standard model (TLM-10) is for use in tanks 10" to 12" deep. Custom lengths are available.


Specify TLM-XX (XX = tank depth in inches).

For 12V, 24V, or 32V DC systems. 

SKU: #

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