Description
The Viessmann 7823511 safety valve is a brand-new genuine replacement component for selected Viessmann Vitodens 200, Vitodens 300-W and Vitopend boilers. It is supplied with a 12-month warranty and should be ordered only after confirming the full appliance model and manufacturer part number.
The safety valve helps protect the boiler and heating system by releasing water if the internal pressure rises beyond a safe operating level. Installation should be completed by a suitably qualified Gas Safe registered engineer.
Product Details
Brand: Viessmann
Part type: Safety Valve
MPN: 7823511
Condition: New and genuine
Warranty: 12 months
Boiler Compatibility
Viessmann Vitodens 200
Vitodens 200 WB2A 20 System NG
Viessmann Vitodens 300-W
Vitodens 300-W WB3B 35 System NG
Viessmann Vitopend WH20
Vitopend WH20 18 Combi NG
Vitopend WH20 24 Combi NG
Viessmann Vitopend WH22
Vitopend WH22 15 Combi NG
Vitopend WH22 24 Combi NG
Viessmann Vitopend WH24
Vitopend WH24 18 Combi NG
Vitopend WH24 24 Combi NG
Viessmann Vitopend WH26
Vitopend WH26 24 Combi NG
Delivery & Collection
Collection is available from our Newcastle showroom at Unit 5, Penn Street, Newcastle upon Tyne, NE4 7BG, usually on the same day, subject to stock availability. If the item is not in stock, collection is normally available the next working day. We also offer fast UK delivery through Royal Mail First Class or DPD Next Day, with most orders arriving within one to two working days. Boiler components should be installed by a suitably qualified Gas Safe registered engineer.
Warranty
This brand-new genuine Viessmann boiler safety valve is supplied with a 12-month warranty. Warranty claims may be subject to inspection and confirmation that the component was correctly selected and professionally installed.
Returns
We accept returns within 30 days of delivery. The product must be unused, unfitted and returned in its original unopened packaging with all seals intact. We cannot accept returns for components that have been fitted, used, damaged or returned in an unsuitable condition. Please check the boiler model, GC number, edition, serial-number range and part number carefully before ordering.
If you need any help, our team is happy to assist. Please contact us by phone or WhatsApp chat.
Frequently Asked Questions
Is the Viessmann 7823511 compatible with Vitodens 200 boilers?
Yes. It is confirmed for the Viessmann Vitodens 200 WB2A 20 System NG. Check the full boiler model and existing component number before ordering.
Does this safety valve fit Viessmann Vitopend boilers?
Yes. It is confirmed for selected Vitopend WH20, WH22, WH24 and WH26 combi boilers listed in the compatibility section.
How can I confirm that Viessmann 7823511 is the correct replacement?
Compare the manufacturer part number on the existing component with 7823511 and check the full appliance model against the compatibility list. A boiler-parts specialist or Gas Safe registered engineer can assist if the original number is unclear.
What symptoms may indicate a problem with the safety valve?
Possible signs may include water discharging from the pressure-relief pipe, visible leakage around the valve or repeated pressure loss. These symptoms do not automatically confirm that the safety valve is defective, so professional diagnosis is recommended.
Does this Viessmann safety valve require professional installation?
Yes. Safety valves are important boiler pressure-control components and should be inspected and installed by a suitably qualified Gas Safe registered engineer.
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