Andrews
Andrews Expansion/Check Valve C781
Andrews C781 3/4 inch expansion/check valve for use with a range of Andrews water heaters.
At a glance
- Also known as 1820285
£168.00
£140.00 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 Andrews C781 is a 3/4 inch expansion/check valve. It is manufactured by Andrews Water Heaters for use in their water heaters and boilers. The valve controls expansion and prevents backflow within the system.
Signs this part needs replacing
- Water leaking from the valve body or connections
- System pressure dropping repeatedly
- Discharge from the expansion relief pipe
- Noisy operation or water hammer in the pipework
- Failure to prevent backflow
Before you order
- Check your appliance model against the fit list above
- Confirm the valve connection size is 3/4 inch
- Isolate the water supply and depressurise the system before replacement
Mechanical
| Part type | CHECK VALVES |
|---|
Compliance
| Manufacturer part number (MPN) | C781 |
|---|---|
| Barcode / EAN | 5039192378104 |
| Alternative numbers | 1820285 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ANDREWS WATER HEATERS 24/39 STANDARD | — | — | — | |
| ANDREWS WATER HEATERS 32/40 STANDARD | — | — | — | |
| ANDREWS WATER HEATERS 40/61 STANDARD | — | — | — | |
| ANDREWS WATER HEATERS 63/62 STANDARD | — | — | — | |
| ANDREWS WATER HEATERS 84/87 STANDARD | — | — | — | |
| ANDREWS WATER HEATERS ANDREWS HOT WATER SPARES | — | — | — | |
| ANDREWS WATER HEATERS L24/31 STANDARD | — | — | — | |
| ANDREWS WATER HEATERS L32/35 STANDARD | — | — | — | |
| ANDREWS WATER HEATERS L40/36 STANDARD | — | — | — | |
| ANDREWS WATER HEATERS L63/71 STANDARD | — | — | — |
Showing 10 of 18 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.
ANDREWS WATER HEATERS appliance manual — 24/39 STANDARD, 32/40 STANDARD, 40/61 STANDARD, 63/62 STANDARD, 84/87 STANDARD
manualmanualANDREWS WATER HEATERS appliance manual — L24/31 STANDARD, L32/35 STANDARD, L40/36 STANDARD, L63/71 STANDARD, L84/74 STANDARD
manualmanualANDREWS WATER HEATERS appliance manual — OFS25, OFS29
manualmanualANDREWS WATER HEATERS appliance manual — RSC 150, RSC 190
manualNo technical questions yet for this part.
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