Checking hours…Mon–Fri 7:30am–5pm · Sat 9am–12pm01302 279234Trade account
Onyx 22mm electrolytic scale inhibitor ONYX22

SPECIAL OFFERS

Onyx 22mm electrolytic scale inhibitor ONYX22

A 22mm in-line electrolytic scale reducer that alters dissolved hardness salts in mains water to reduce limescale build-up in pipework and appliances.

At a glance

Manufacturer part no.
ONYX22
Showing prices

£15.12

£12.60 ex. VAT · VAT at 20%

In stock
Cut-off passed — dispatches next working day
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 Onyx ONYX22 is a 22mm in-line electrolytic scale inhibitor from Onyx. It uses electrolytic principles to alter the structure of hardness salts dissolved in the water, reducing the tendency of limescale to form deposits on pipework and appliances in hard-water areas.

Signs this part needs replacing

  • Increasing limescale deposits on pipework, cylinders or heat exchangers despite the unit being fitted
  • Reduced water flow or pressure through affected pipework
  • Visible corrosion or damage to the unit's housing or connections
  • The unit has exceeded its rated service life

Before you order

  • Match the part number (ONYX22) printed on your existing unit before ordering
  • Isolate the water supply before removing or fitting the unit
  • Confirm the pipe connection size is 22mm

Not sure which part?

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

Onyx 22mm Electrolytic Scale Inhibitor ONYX22