Viessmann
Viessmann Test Port Cap 7817966
Viessmann test port cap, part 7817966, supplied as a set of two for Vitocrossal 300 Cu3A boilers.
At a glance
- Appliance family: Vitocrossal 300 Cu3A
- Also known as 2322076
£26.56
£22.13 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
This is a test port cap for Viessmann appliances, supplied by Viessmann under part number 7817966 as a set of two. The cap closes off the test port on the appliance, sealing the point used for pressure and combustion readings. It is listed for use on the Vitocrossal 300 Cu3A range.
Signs this part needs replacing
- The cap is missing from the test port after servicing or commissioning
- Water or flue gas is escaping from the test port with the cap fitted
- The cap is cracked, deformed or no longer seats correctly on the port
- The cap shows corrosion or heat damage at the sealing face
Before you order
- Confirm the appliance model against the fit list above
- Check whether the test port requires one or two caps on your appliance, as this item is supplied as a set of two
- Note the manufacturer part number 7817966 so it matches the part being replaced
- Inspect the test port itself for thread or seating damage before fitting a new cap
Compliance
| Alternative numbers | 2322076 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| VIESSMANN VITOCROSSAL 300 CU3A 26 SERIAL No. 7553000 | — | — | — | |
| VIESSMANN VITOCROSSAL 300 CU3A 35 SERIAL No. 7553001 | — | — | — | |
| VIESSMANN VITOCROSSAL 300 CU3A 45 SERIAL No. 7553002 | — | — | — | |
| VIESSMANN VITOCROSSAL 300 CU3A 57 SERIAL No. 7553003 | — | — | — |
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 documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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