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Vaillant Water Quantity Limiter 011603

Vaillant

Vaillant Water Quantity Limiter 011603

Vaillant water quantity limiter, part 011603, restricts domestic hot water flow to 14 litres per minute in compatible ecoTEC and Aquaplus appliances.

At a glance

  • Also known as 1372099
Manufacturer part no.
011603
Showing prices

£9.60

£8.00 ex. VAT · VAT at 20%

Available to order · 5-7 working days
Available to order · 5-7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Vaillant 011603 water quantity limiter is a flow-restricting component rated at 14 litres per minute. It is used in compatible Vaillant ecoTEC and Aquaplus appliances to control the domestic hot water draw-off rate.

Signs this part needs replacing

  • Domestic hot water flow noticeably below the rated 14 litres per minute
  • Flow rate that surges or varies at the outlet during draw-off
  • Whistling or humming from the water section when a hot tap is opened
  • Scale or debris build-up restricting the limiter
  • Reduced hot water performance that persists after the inlet filter and tap strainers have been checked

Before you order

  • Check the appliance data badge for the model and GC number and confirm it appears in the list above.
  • Confirm the existing limiter is rated at 14 litres per minute.
  • Inspect the water inlet for scale or debris that may be causing the restriction instead.
  • Have the part number 011603 to hand when ordering.

Not sure which part?

Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.