Viessmann
Viessmann Condensate Hose 7818021
Viessmann condensate hose, part number 7818021, for Vitodens 100 and 200 series boilers built between 2005 and 2006.
At a glance
- Also known as 2320550
£14.78
£12.32 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Viessmann 7818021 is a condensate hose used on Vitodens 100 and Vitodens 200 series gas boilers. It carries condensate away from the heat exchanger and flue components down to the condensate trap or discharge point. This variant is listed for appliances built from 14.01.2005 until 04.04.2006.
Signs this part needs replacing
- Water or condensate pooling beneath the boiler or around the condensate trap
- Visible cracking, hardening or perishing of the hose material
- White, chalky deposits or scale build-up on or inside the hose
- Blocked or restricted condensate flow causing the boiler to lock out or shut down
- Condensate trap overflowing despite the trap itself being clear
Before you order
- Confirm the boiler model and variant against the fitment list above
- Check the appliance serial number and build date, as this hose is listed for a specific production window
- Inspect the hose routing and connection points to confirm the failure is with the hose rather than the trap or discharge pipework
Compliance
| Alternative numbers | 2320550 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 100 SYSTEM 24KW | — | — | — | |
| VIESSMANN VITODENS 100 SYSTEM BOILER 24KW SERIAL No. 7179918 | — | — | — | |
| VIESSMANN VITODENS 100-W B1HF 11KW SYSTEM SERIAL No. 7723177 | 41-819-51 | 41-819-51 | — | — |
| VIESSMANN VITODENS 100-W B1HF 19 KW SYSTEM SERIAL No. 7723178 | 41-819-48 | 41-819-48 | — | — |
| VIESSMANN VITODENS 100-W B1HF 25 KW SYSTEM SERIAL No. 7723179 | 41-819-49 | 41-819-49 | — | — |
| VIESSMANN VITODENS 100-W B1HF 32 KW SYSTEM SERIAL No. 7723180 | 41-819-50 | 41-819-50 | — | — |
| VIESSMANN VITODENS 100-W B1KF 26 KW COMBI SERIAL No. 7723181 | 47-819-50 | 47-819-50 | — | — |
| VIESSMANN VITODENS 100-W B1KF 30 KW COMBI SERIAL No. 7723182 | 47-819-51 | 47-819-51 | — | — |
| VIESSMANN VITODENS 100-W B1KF 35 KW COMBI SERIAL No. 7723183 | 47-819-52 | 47-819-52 | — | — |
| VIESSMANN VITODENS 200 WB2 6-24 SERIAL No. 7167064 | — | — | — |
Showing 10 of 98 compatible appliances.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.