How does an underfloor heating manifold work?

An underfloor heating manifold is a system that is made up of a series of thermostatically controlled two-port valves

The underfloor heating manifold

Underfloor heating has lots of benefits. Not only does it provide warmth in a comfortable, even way (in comparison to other heating systems such as traditional radiators), it is also very cost effective as it is both economical to run and almost maintenance free too.

If you are considering the installation of underfloor heating in your next construction project, you may have come across the term “manifold” before and be wondering what it means. Well after previously looking at what underfloor heating is best, in our latest blog post we take a closer look at underfloor heating manifolds in order to learn how does underfloor heating manifold work. Read on to find out more and get yourself up to speed.


What is an underfloor heating manifold?

In terms of underfloor heating, an underfloor heating manifold is a system that is made up of a series of thermostatically controlled two-port valves. It also includes temperature gauges, a mixing valve and circulation pump. An underfloor heating manifold can also referred to as a compact multi-port arrangement, and can have anything from two to twelve circuits in total, depending on the size of the system.


What parts does an underfloor heating manifold have?

Underfloor heating manifold is made up of the following parts:

  • Adjustable balancing valves, which allow you to adjust the amount of water that flows through each individual circuit
  • Ball valves are simple isolation valves that turn on and off
  • Blanking plate which prevents the mixed water returning to the boiler
  • Drain and fill bibcock is located underneath each ball valve and connects loose pipes and pumps to the underfloor heating manifold itself
  • Flow meters are there to help you measure the rate that the water is flowing through each loop in the circuit
  • Limit thermostat which cuts the system if the water entering the circuit is too hot
  • Pressure gauge which is there to measure the underfloor heating system’s pressure
  • Return bypass which recirculates water in the system in order to prevent energy wastage


What is an underfloor heating manifold used for?

Underfloor heating manifold is used to distribute the warm water from the heating system’s heat source (such as a boiler or heat pump) to the heating circuits.


How does an underfloor heating manifold work?

In an underfloor heating manifold, valves placed on the manifold achieve balance between the heating circuits. Acting as the hub of a heating system, an underfloor heating manifold connects both your supply and return lines in a central place.

After reading this blog, you should have a better idea of how underfloor heating manifold works. And if you’re interested in using underfloor heating in your next building project, then we can help.

UKS Group is the UK’s largest and most experienced underfloor heating and flooring specialist. To find out more about our underfloor heating services, contact the sales team today by calling 0117 907 7298 or emailing