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Vaillant Water Quantity Regulator 012946

Vaillant

Vaillant Water Quantity Regulator 012946

Water quantity regulator (CPL) for Vaillant MAG SINE and MAG 275/350/440 gas water heaters.

At a glance

  • Part type: water quantity regulator
  • Also known as 1372154
Manufacturer part no.
012946
Showing prices

£9.60

£8.00 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 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 Vaillant 012946 is a water quantity regulator, designated CPL, for Vaillant gas water heaters. It sits in the water circuit of the MAG SINE and MAG series appliances and controls the quantity of water passing through. It is a serviceable component within the appliance's water section.

Signs this part needs replacing

  • Inconsistent or fluctuating hot water temperature
  • Reduced or erratic water flow at the outlet
  • Water flow that cannot be set or adjusted reliably
  • Appliance cycling or cutting out during draw-off
  • Visible scale, debris or damage at the regulator

Before you order

  • Confirm your appliance model against the fit list above.
  • Check that the part number on the existing component matches 012946.
  • Isolate the water and gas supplies before removing the old regulator.
  • Check the water circuit for scale or debris that may have caused the fault.

Not sure which part?

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