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TAC Schneider MBX 4551 1.1/4" 3-Port LPHW Valve

TAC Schneider

TAC Schneider MBX 4551 1.1/4" 3-Port LPHW Valve

TAC Schneider MBX 4551 3-port LPHW valve with 1.1/4" connections, CV12 variant.

At a glance

  • Also known as 4460252
Manufacturer part no.
MBX4551
Showing prices

£562.69

£468.91 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 TAC Schneider MBX 4551 is a 3-port low pressure hot water (LPHW) valve from TAC Schneider, listed under the CV12 designation. It is used to divert or mix flow within an LPHW circuit, directing water between ports according to the system's control demand. The valve body carries 1.1/4" connections.

Before you order

  • Confirm the existing valve's port size is 1.1/4" and that the replacement matches the pipework on site.
  • Check the configuration of the valve being replaced — this is a 3-port unit, not a 2-port.
  • Verify the part number and designation stamped or labelled on the existing valve correspond to MBX 4551 / CV12.
  • Check the installation's actuator arrangement and control wiring before removing the existing valve body.

Not sure which part?

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