Viessmann
Viessmann Safety Valve 3Bar D19.9 x D21.7 PRV 7837400
Viessmann 3 bar safety valve with D19.9 x D21.7 connections, part 7837400, for Vitodens 111-W, 222-F and 242-F boilers.
At a glance
- Appliance family: Vitodens 111-W, 222-F and 242-F gas boilers
- Also known as 2322048
£56.87
£47.39 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 Safety Valve 3Bar D19,9 X D21,7 PRV is a pressure relief safety valve for Viessmann Vitodens gas boilers. It opens at a 3 bar set pressure to relieve excess pressure from the heating circuit and protect the appliance and system components. It is supplied under Viessmann part number 7837400.
Signs this part needs replacing
- Water discharging continuously from the pressure relief discharge pipe with the system cold
- Boiler pressure dropping repeatedly after topping up, with no visible leak elsewhere on the system
- Water weeping or dripping from the valve body or outlet during normal operation
- System pressure rising into the 3 bar range and failing to hold steady
- Scale or corrosion deposits around the valve seat or outlet
Before you order
- Confirm the set pressure required for the appliance is 3 bar
- Check the connection dimensions D19,9 x D21,7 against the valve being removed
- Verify the boiler model and serial number against the fits list above
- Inspect the discharge pipework and expansion vessel condition as part of the same repair
Compliance
| Alternative numbers | 2322048 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITODENS 111-W B1LB 26 KW GB ERP SERIAL No. 7543448 | 47-819-36 | 47-819-36 | — | — |
| VIESSMANN VITODENS 111-W B1LB 35 KW GB ERP SERIAL No. 7543449 | 47-819-37 | 47-819-37 | — | — |
| VIESSMANN VITODENS 111-W B1LD 26 KW GB SERIAL No. 7570732 | 47-819-43 | 47-819-43 | — | — |
| VIESSMANN VITODENS 111-W B1LD 35 KW GB SERIAL No. 7570733 | 47-819-44 | 47-819-44 | — | — |
| VIESSMANN VITODENS 222-F B2TA 19KW SERIAL No. 7513044 | 47-819-15 | 47-819-15 | — | — |
| VIESSMANN VITODENS 222-F B2TA 26KW SERIAL No. 7513045 | 47-819-16 | 47-819-16 | — | — |
| VIESSMANN VITODENS 222-F B2TA 35KW SERIAL No. 7513046 | 47-819-17 | 47-819-17 | — | — |
| VIESSMANN VITODENS 242-F FB2A 26KW SERIAL No. 7438016 | 47-819-19 | 47-819-19 | — | — |
Documents & drawings
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