Honeywell
Honeywell Auto By-Pass Valve DU144A1001
Honeywell DU144A1001 auto by-pass valve in 22mm straight configuration for heating system differential by-pass control.
At a glance
- Also known as 4200170
£71.18
£59.32 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 Honeywell DU144A1001 is an auto by-pass valve supplied in a 22mm straight pattern. It is also listed as a differential by-pass valve and is used within heating systems to maintain a minimum flow across the boiler when system valves close down. The valve modulates automatically in response to differential pressure rather than being set by hand.
Before you order
- Confirm the pipework connection size is 22mm and that a straight pattern body suits the installation layout.
- Check the part number DU144A1001 against the existing valve or the system documentation.
- Confirm whether an automatic by-pass valve is the correct component for the system design and boiler requirements.
- Verify the installation position gives adequate clearance for the valve body and any adjustment access.
Compliance
| Alternative numbers | 4200170 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HONEYWELL RESIDENTIAL PRODUCTS | — | — | — |
Documents & drawings
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