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Schneider Electric 3-port rotary valve, 1in BSP, MB1502

TAC Schneider

Schneider Electric 3-port rotary valve, 1in BSP, MB1502

Schneider Electric (TAC) MB1502 3-port rotary shoe valve, 1in BSP connection, Kv 8.0, used as a gas boiler diverter valve.

At a glance

  • Also known as 4460330
  • Isolate and drain the system before removal; Gas Safe registered engineer required for gas appliance work
Manufacturer part no.
MB1502
Showing prices

£533.06

£444.22 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 MB1502 is a 3-port rotary shoe valve manufactured by Schneider Electric under the TAC brand. It is fitted in heating and hot water systems as a gas boiler diverter valve, with a 1in connection and a Kv (flow coefficient) rating of 8.0.

Signs this part needs replacing

  • Valve fails to divert flow correctly between heating and hot water circuits
  • Stuck or seized rotary shoe mechanism
  • Water leaking from the valve body or spindle seal
  • Boiler loses temperature or pressure control linked to the valve
  • Actuator turns but the valve doesn't move, indicating internal wear

Before you order

  • Match the part number MB1502 printed on your existing valve
  • Confirm your valve body size (1in) before ordering
  • Check whether the matching actuator also needs replacing
  • Isolate and drain the system before removal; Gas Safe registered engineer required for gas appliance work

Not sure which part?

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