The Toyotomi 17185392 is a genuine Exhaust Flex Pipe, 20 inch for NS2800, NS2700. 20 inch flexible exhaust pipe section, pipe only, for the vent run on the NS2700 and NS2800. Replace when corroded or when it no longer seals at the joints.
This is an OEM Toyotomi part, so it fits and performs the way the original did. Confirm your heater model before ordering; the model is on the rating label on the unit. If you are not sure which part you need, Rural Energy support can check it against your model and serial number.
Rural Energy is a Toyotomi distributor and keeps NS-series heater parts in stock for fast shipping to dealers and homeowners.