Fernox TF1 Sigma UB Filter 22mm (Under-Boiler) – 62631

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Sale price£70 GBP
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In stock (11 units), ready to be shipped

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Fernox TF1 Sigma UB Filter 22mm – 62631

Compact, under-boiler magnetic system filter with a forged brass manifold and sealed, lidless body for reliable debris capture without restricting flow. Designed for horizontal installation on the return, close to the wall and beneath the boiler.

  • Fit: 22 mm compression (UB = under-boiler)
  • Valve: Integrated three-way ball valve with isolate & clean function
  • Magnet: Premium neodymium for high capture efficiency
  • Max working pressure: 5 bar | Max temp: 100 °C
  • Max flow: 40 L/min | Fluids: Water & inhibited glycol (≤50%)
  • Materials: Glass-reinforced engineering polymer body, nickel-plated brass manifold, EPDM seals
  • Warranty: 10 years (registration & maintenance per Fernox)

Installation notes

Fit horizontally on the return to the boiler. For some boilers, flexible hoses/adaptors may be required (not supplied). Clean by withdrawing the magnet and using the service/drain point. Always follow BS 7593 and the boiler manufacturer’s instructions.

What’s included

  • TF1 Sigma UB filter assembly (22 mm compression)
  • Integrated three-way service valve with drain
  • Instructions

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