This HI Water Probe is required for appropriate water fill operation on Mr.Steam’s Commercial CU model steam bath generator models CU360 – CU1400 and on models CU1000 – CU1400 with serial numbers beginning with “AX”.

The HI Water Probe along with the probe spark plug ensures that the appropriate amount of water is in the generator tank. If the water probe is dirty with lime buildup, it will have a false sense of ground and blow/dry-fire the heating element(s).

One (1) HI Water Probe made of stainless steel and measures 1/4” x 6”.