Safeguard your commercial boiler with this genuine Rocket Espresso boiler level / safety probe, part M199904821. Threaded into the top of the service boiler, the OT57 low-lead brass body and food-grade stainless electrode provide a precise reference point for the autofill control board—topping up water when needed and shutting off power if the level drops too low. The insulated ceramic spacer withstands relentless steam heat, while the 6.3 mm spade terminal makes installation a quick, solder-free swap during routine maintenance. Replace tired or scaled probes and keep your heating elements, pump and customers perfectly protected.
Key Features & Benefits
Accurate water-level sensing — prevents dry-fire and costly element failure
Low-lead OT57 brass sleeve — food-safe, corrosion-resistant and NSF-compliant
Standard 6.3 mm push-on terminal — plug-and-play with Rocket wire looms
Easy DIY replacement — remove old probe, thread in new gasket-sealed unit in minutes
Compatibility
Boxer 2014, Boxer (202009- / 202405-)
Doppia (202407-) & RE-Doppia (201910- / 202002-)
R8 (201711-) & R8V (201711-)
R9 (201702- / 202311-) & R9V (202004- / 202211-)
RE A 2014 / 2016; RE-A (201912- / 202207-)
RE-S (201802-)
RE-Timer (201806- / 202207-)
Install this probe and enjoy worry-free boiler management, faster service recovery and longer component life.
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This part is compatible to the original part number. Part numbers are always leading.
This OEM Rocket Espresso control board is rated at 115V and 16A. It provides essential electronic control for specific newer models, ensuring precision and reliability in performance. Manufactured in Italy.
OEM part number: A19907551
Voltage: 115V
Current: 16A
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