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Onyx Potable Accumulator Vessel ONYX200LPOT

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Onyx Potable Accumulator Vessel ONYX200LPOT

Onyx 200 litre blue potable accumulator vessel with 1 1/2 inch connection, 2 bar rating and feet.

At a glance

Manufacturer part no.
ONYX200LPOT
Showing prices

£426.82

£355.68 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 Onyx 200 litre blue potable accumulator vessel is a pressure vessel for potable water systems, holding water under pressure to smooth supply fluctuations and reduce surge in the pipework. It is supplied with a 1 1/2" connection, a 2 bar rating as listed and feet. The vessel sits within the Onyx expansion vessel range.

Signs this part needs replacing

  • Pressure surges, water hammer or knocking in the pipework that the vessel no longer absorbs
  • Visible corrosion, rust staining or weeping around the base, connection or seams
  • Water discharging from the air valve, which points to a failed internal diaphragm
  • Loss of pressure at the air valve when checked with a gauge
  • The vessel no longer holding its set pressure between checks

Before you order

  • Confirm the 200 litre capacity matches the existing vessel and the system demand
  • Check the connection size is 1 1/2" to suit the pipework
  • Confirm the 2 bar figure suits the system's required setting
  • Check there is a level base and enough clearance for the vessel and its feet

Not sure which part?

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