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Honeywell Angled Automatic By-Pass Valve DU146-3/4E

Honeywell

Honeywell Angled Automatic By-Pass Valve DU146-3/4E

Honeywell DU146-3/4E angled automatic by-pass valve with ¾” BSP female connections.

At a glance

  • Also known as 4200190
Manufacturer part no.
DU146-3/4E
Showing prices

£107.69

£89.74 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Honeywell DU146-3/4E is an angled automatic by-pass valve with ¾” BSP female connections. It is a differential by-pass valve that maintains a minimum flow through a heating circuit by opening when the differential pressure across it rises. It is used on pumped heating systems where a by-pass path is required rather than being tied to one specific appliance.

Before you order

  • Confirm the pipework connection is ¾” BSP male to suit the BSP female ports.
  • Check the available space around the installation point suits an angled body.
  • Verify the part number DU146-3/4E against the existing valve or system documentation.

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.