Replacement parts for Bosch tankless water heaters can be purchased through HouseNeeds.com, ProheatDirect.com, GlobalTowne.com and PlumbingSupply.com. As of March 2015, HouseNeeds.com carries replacement parts for at least 10 different models of Bosch tankless water heaters.
On HouseNeeds.com, replacement parts are organized by model number. Models include 2700ES, 1600H, 1000P, 1600P and 2400ES. The website carries a number of Bosch Aquastar tankless water heater replacement parts as well. The website's replacement parts inventory includes pilot electrovalves, heat exchangers, outlet flex hose washers and inlet water connectors. HouseNeeds.com also provides customers with four flat rate shipping options that range in price from $35 to $95.
ProheatDirect.com carries replacement parts for over 10 different models of Bosch tankless water heaters including solar, electric and gas-powered appliances. Price fall between about $3 for a Bosch water valve set screw to almost $300 for a Bosch tankless water heater heat exchanger.
GlobalTowne.com specializes in replacement parts for tankless water heaters and sells over 30 parts specifically designed for Bosch models. Replacement parts include heat exchangers, water valves, gas valves, control boards and control boxes.
PlumbingSupply.com stocks replacement parts for only Bosch Aquastar tankless water heater models. Prices ranges from about $5 for a pilot injector gasket to a little under $140 for a valve assembly.