For support call: 0330 100 3143
Return to homeowner

Low-loss headers

For use with ecoTEC plus 48 and 64kW

  • Maintains correct flow of water through the boiler
  • Aids in providing a constant temperature supply of water to reach multiple heating circuits downstream of the low-loss header connection
  • Suitable for new clean systems up to 70kW net input
Request a quote


Vaillant low-loss headers are only suitable for new clean systems up to 70kW net input with correctly inhibited water.

These heating systems may have different temperature and flow-rate requirements (e.g. underfloor heating and radiator circuits). Cooler return water from the heating circuits is mixed with water from the boiler in the low-loss header. An NTC is used to monitor the temperature of water supplied by the boiler to maintain a steady flow temperature. It is recommended that a suitable dirt filter is fitted in the return flow between the low-loss header and the heating circuits as a precaution to prevent system dirt entering the boiler.

Related Products

Related Products

ecoTEC plus 48 and 64kW

  • Compact design
  • Suitable for natural gas and LPG applications
  • High efficiency stainless steel heat exchanger
  • Hand-built in our award-winning Derbyshire manufacturing plant
  • Full range of accessories available

uniSTOR 500 and 800 litre cylinders

  • Large diameter, smooth coil technology
  • Factory fitted T&P valve
  • Single guarantee for all components
  • Global Warming Potential less than 5 and ozone depletion of 0


How to get

Vaillant Commercial boilers and accessories are available over the counter or as a next day service at most plumbing and heating merchants throughout the UK.

We can provide you with bespoke solutions to accommodate a variety of installations. To discuss your requirements please contact us.

Alternative products

Alternative products

Plate heat exchangers

  • Separates system water from the boiler
  • Compatible with ecoTEC plus 48 - 120kW and ecoCRAFT boilers
  • Suitable for cascade rigs and single installations
  • Protects the boiler and provides longevity