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Danfoss AVDO 20 Automatic By-Pass Valve 003L612200

Danfoss

Danfoss AVDO 20 Automatic By-Pass Valve 003L612200

Danfoss AVDO 20 automatic by-pass valve with 22 mm connections, part number 003L612200.

At a glance

  • Also known as 4105177
Manufacturer part no.
003L612200
Showing prices

£172.51

£143.76 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 Danfoss AVDO 20 is an automatic by-pass valve with 22 mm connections, supplied under manufacturer part number 003L612200. It is fitted across the flow and return of a heating circuit to maintain a minimum flow through the heat source when terminal units or zone valves close down. The valve opens automatically as system differential pressure rises, then closes again as demand returns.

Before you order

  • Confirm the pipework at the installation point is 22 mm.
  • Check that the system design calls for an automatic by-pass rather than a fixed by-pass arrangement.
  • Match the existing valve against the manufacturer part number 003L612200 before ordering.
  • Confirm the installation position allows access for setting and future servicing.

Not sure which part?

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