Keep every threaded joint in your Rocket machine bone-dry with this genuine copper gasket, part C479900673. Machined for 3/8-inch connections, the annealed copper washer cold-forms as you tighten, filling microscopic surface imperfections to create a gas- and steam-tight seal that stands up to boiler temperatures and daily pressure cycles. Copper’s work-hardening property resists vibration loosening and outlasts fibre or PTFE alternatives—making it the smart, long-life choice for routine maintenance or emergency repairs. Slip a few into your parts kit and enjoy rock-steady pressure, spotless internals and consistently great-tasting espresso.
Key Features & Benefits
Annealed copper construction — superior thermal conductivity and corrosion resistance
Crush-form sealing — conforms perfectly to mating faces for drip-free performance
3/8-inch inside diameter — OEM fit on Rocket brew, steam and water lines
Reusable after re-annealing — economical for multiple service cycles
Small part, big protection — prevents scale creep and preserves pump pressure at critical joints
Swap in a fresh copper washer at every disassembly and keep your Rocket Espresso running clean, quiet and leak-free.
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This part is compatible to the original part number. Part numbers are always leading.
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