Rinnai 50i Gas Water Heater Service Kit (P50IVR-SERVICE) A standard service on a Rinnai 50i (HD50i, REU-VR2632FFUDHD-E) touches a number of sealing and ignition components at once — manifold gaskets, the electrode and flame rod, combustion chamber packing, and gas valve packing — and this kit brings all of them together in one order. Fitting genuine components as part of scheduled maintenance helps the appliance keep running at its intended efficiency, reduces the risk of leaks or ignition faults developing from worn seals, and supports the long-term reliability a well-maintained water heater depends on. ⚠ Important: Installation and servicing must be carried out by a qualified technician familiar with Rinnai products. Turn off the gas supply and disconnect power before beginning any servicing. Key Features &am