How to Install Wet Underfloor Heating Manifolds

As we mentioned previously, only qualified plumbing professionals or heating engineers should install Wet Underfloor Heating manifolds. Unlike electric systems, it is not a DIY job and a qualified individual should be on hand to fit the manifold and lay the pipes.

However, there is much you can do to prepare and to keep in mind for when the installation day arrives:

  • The installer has taken receipt of all scheduled materials for the project;
  • Where applicable, sub-floors are clean and free of debris. Sub-floor should be measured again prior to installation to ensure all depths are as per the design.
  • All installation instructions have been read and understood by all relevant parties.
  • The designated areas for each component have been measured and confirmed suitable to house the equipment.
  • No materials are damaged or faulty.

The Manifolds

The manifold is the central distribution point for underfloor heating. The water is sent from the primary household heating source (e.g. gas boiler), where the water is cooled to the specified UFH temperature and pumped under the floor surface. It travels under each area, transferring its heat up through the floor evenly, before arriving back at the manifold and being sent back to the boiler for reheating. Being the central point of the system, the manifold should be assembled and mounted first.

Where should a Manifold be positioned?

The manifold should be positioned centrally in the property such that distribution to each heated area is efficient and involves minimal long pipe runs. It should be ensured that copper pipework to and from the boiler can reach the designated manifold location. If you have received a design and quotation from VPS Underfloor Heating engineers, the manifold location will already be chosen and agreed upon.

The installer should allow for the following recommended clearances when mounting the manifold on the wall:

Manifold Assembly

At your chosen/designated manifold location, mount the manifold on the wall using suitably rated fittings/rawl plugs, at the specified installation clearances. Insert the Auto Air Vent assembly and pressure gauge assembly as shown, ensuring they are tight, properly threaded and not angled.

Connect ball valves (blue and red valves shown on left of Fig. 3) in one of the two configurations shown. This will be chosen based on the geometry of the manifold location, and which configuration will be able to meet the installation clearances.

Connect and tighten the manifold control pack (where applicable). Ensure all fittings are properly threaded and tightened. Ensure that pump and blending valve are both in the correct orientation, facing upwards as denoted by arrow markings on each unit.

Install wet underfloor heating manifolds

Remember that installing Wet Underfloor Heating Manifolds is not an easy job and needs much preparation – give us a call if you want to talk over your Wet Underfloor Heating project.

Who are we?

VPS Underfloor Heating are able to answer any question you might have in regards your upcoming project or installation and stock a range of top-quality underfloor heating products from some of the most recognised names in the business including: Grundfos, Heatmiser, ProWarm, ESBE and Salus Controls.

Give us a call on 0141 459 3141 to talk to one of the team or choose one of the options below and attach your plans and we’ll get back to you with a breakdown of what you’ll require to get your installation up and running.

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