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Bosch 8703305356

Therm 8703305356 External Water Filter
★★★★★ ★★★★★

Therm 8703305356 External Water Filter


Items that are currently in-transit to our warehouse, are currently in-stock at a drop-ship vendor’s, or manufacturer's warehouse will be marked as "Available". These products will ship once your order is processed (usually within 24-48 business hours). For any exceptions to this timeframe, an ETA (Estimated Time of Arrival) for your order will be emailed with accurate shipping dates in order to ensure that you are always updated and informed as to when your order will arrive at its final destination.

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The Bosch External Water Filter (8703305356) replaces the internal water filter that comes with the heater. Having the water filter external means it is located under the Bosch Therm tankless water heater and is therefore easy to access and clean out. Odds are that if you do not install the external water filter then the internal water filter will not get regularly cleaned out as you would have to open the cover and remove the control board to get to the internal water filter, which is not very convenient. The Bosch Therm External Water Filter is designed to work with the following Bosch Therm Tankless Water Heaters: C 1210 ESC, GWH C 920 ESC, C 1210 ES, GWH C 920 ES, C 1050 ES, GWH C 800 ES, C 950 ES, 940ES, 940ESO, GWH 715 ES, and 830ES. This accessory is not included with these heaters and is highly recommended. The Bosch External Water Filter is not designed to work with the new Bosch Greentherm C 1050 ES or the C 950 ES tankless water heaters as these heaters come equipped with externally accessible water filters. The Bosch External Water Filter is included with the Bosch Integra 500 and Bosch Evolution 500 water heaters. Available at AppliancesConnection


The Bosch Group has been a leading global supplier of technology and services in the areas of Automotive, Industrial Technology, Consumer Goods and Building Technology for over 100 years. The company was founded in Stuttgart, Germany, in 1886 and today has more than 300 subsidiaries in over 150 countries. Every Bosch product is built with one goal in mind; to enhance the quality of your life every day by providing solutions which are both innovative and truly beneficial.


  • External water filter kit
  • Brass construction


Brand Bosch Therm
Model Bosch Therm External Water Filter (8703305356)
Application Commercial,Residential
Indoor/Outdoor Installation Indoor
Material of Construction Brass
Heater Style N/A
Product Dimensions (H" x W" x D") 38 x 8 x 8
Product Weight (Lbs) 2
Shipping Weight (Lbs) 10.0000
Condensing Unit N/A
Energy Factor N/A
Product Type Gas Heater Accessory
Pipe Size N/A


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  • Brand:Bosch
  • SKU:8703305356
  • UPC:4010009645689
  • Stock Id:345489
  • Product Number:8703305356

    Technical Details

  • Weight:10.00 lbs