Rocket Espresso Boiler Return Connection M279904703 – RE & Boxer Line

Maintain flawless heat-exchanger circulation with this factory boiler return connection, part M279904703. Machined from low-lead brass and finished to Rocket’s exacting tolerances, the fitting routes water from the heat-exchanger back to the service boiler, keeping brew temperatures stable and protecting pumps from cavitation. Deep, perfectly cut threads bite cleanly into the boiler boss, while the hex flats give you positive wrench purchase for a drip-tight seal in seconds. Install it during routine maintenance or when rebuilding a tired hydraulic circuit and bring your commercial workhorse back to its original, rock-steady performance.

Key Features & Benefits

• OEM-matched geometry — drops straight into Rocket RE and Boxer platforms
• Low-lead brass (OT58) — food-safe, corrosion-resistant and easy to descale
• Precision thread cut — ensures leak-free installation without excess torque
• Full-bore design — preserves flow rate for faster temperature recovery
• Quick DIY replacement — standard wrench flats; no adapters or thread tape needed

Compatibility

• Boxer 2014, Boxer (202009-), Boxer (202405-)
• R8 (201711-) & R8V (201711-)
• RE A 2014 / 2016; RE-A (201912- / 202207-)
• RE-S (201802-)
• RE-Timer (201806- / 202207-)

Swap in this genuine Rocket connection and keep every shot flowing with pinpoint thermal stability.