Baxi Expansion Vessel 12 Litre — Part No. 5106287 (Powermax HE)

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Baxi 12L Expansion Vessel — 5106287

Restore stable system pressure and stop over-pressure trips on Powermax HE systems. This OEM rectangular expansion vessel cushions thermal expansion in sealed CH circuits so your boiler runs safely and efficiently.

Key Features

  • Original Baxi/Potterton part: 5106287 — 12 litre CIMM vessel
  • Flat, compact form factor for inside-case mounting
  • Fixed-membrane diaphragm construction for reliable service
  • Supplied with factory pre-charge (adjust on install to system design)

Typical Compatibility*

  • Potterton Powermax HE 85 / 115 / 150 System NG

*Coverage varies by production run—always confirm via your boiler’s exploded diagram and the exact part number 5106287.

What’s in the Box

  • 1 × 12L expansion vessel assembly (rectangular/flat type)

Install & Safety

Must be installed and commissioned by a qualified, Gas Safe registered engineer. Set pre-charge to match system cold fill pressure; check for leaks and verify expansion performance after purging air.

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