Water Underfloor Heating

Water Underfloor Heating Systems & Components

Shop water underfloor heating products, hydronic underfloor heating components, UFH pipe, manifolds, pump units, overlay boards, controls and installation accessories at ThermRite Shop. Water underfloor heating circulates warm water through pipework beneath the floor, helping deliver even, comfortable heat across the whole room.

This collection brings together the key products needed for a complete wet underfloor heating system, including multilayer pipe, stainless steel manifolds, pump and mixing units, pipe fixings, spreader plates, boards, panels and installation tools. Whether you are planning a new build, extension, renovation or retrofit project, our water UFH range is suitable for trade installers, contractors and domestic heating upgrades.

Which Water Underfloor Heating Products Do I Need?

Use the table below to compare the main product groups used in a complete water underfloor heating system.

Product Type Best For What It Does Shop
Pumps & Temperature Control Units Circulating and controlling water temperature in manifold-based UFH systems. Pump and mixing units help move warm water through the floor circuits and regulate the UFH flow temperature. View pump units
Multilayer Underfloor Heating Pipe Carrying warm water through each floor heating circuit. Choose 12mm or 16mm UFH pipe for most floor heating layouts, with larger multilayer pipe options for heating distribution. View pipe
Underfloor Heating Manifolds Distributing water to each pipe loop or heating zone. Manifolds control and balance flow through each circuit, with options for actuators and zone control. View manifolds
Boards & Panels Overlay, retrofit, timber floor and low-profile UFH installations. Panels and boards hold pipe in position and help spread heat efficiently through the floor build-up. View boards & panels
Pipe Fixings & Accessories Securing, spacing and supporting UFH pipe during installation. Pipe clips, fixing rails, tacker guns, bending elbows and spreader plates help create a neat, reliable pipe layout. View pipe fixings
Tools & Installation Accessories Cutting, preparing, testing and fitting underfloor heating systems. Includes pipe cutters, reaming tools, decoilers, pressure test pumps, edge insulation and fitting accessories. View tools

Key Benefits of Water Underfloor Heating

Even Room-Wide Warmth Water UFH spreads heat across the floor area, helping reduce cold spots and improving comfort throughout the room.
Lower Flow Temperatures Wet underfloor heating is designed to operate at lower water temperatures than traditional radiators, making it well suited to efficient heating systems.
Compatible with Heat Pumps Because UFH works well at lower flow temperatures, it is a popular choice for homes using heat pumps and low-temperature heating designs.
More Usable Wall Space Underfloor heating reduces the need for radiators, helping free up wall space for furniture, glazing and interior layouts.
Zoned Heating Control Manifolds, actuators and thermostats allow different rooms or zones to be controlled independently for comfort and efficiency.
Suitable for New Builds & Retrofits Choose in-screed systems for new floors, or overlay boards and low-profile panels for renovation and retrofit projects.

What Makes Up a Complete Water Underfloor Heating System?

A complete water underfloor heating system normally includes pipework, a manifold, a pump or pump and mixing unit, insulation or boards, fixings and controls. The exact products depend on the floor construction, heat source, number of zones and whether the project is a new build, extension or retrofit installation.

Component Purpose Typical Use
UFH Pipe Carries warm water through each floor heating circuit. 12mm pipe for low-profile systems and 16mm pipe for many standard water UFH layouts.
Manifold Distributes water to each loop and allows flow balancing. Used on most multi-loop water underfloor heating systems.
Pump & Mixing Unit Circulates water and helps control the UFH supply temperature. Commonly fitted alongside or directly to the manifold.
Boards, Panels or Insulation Support the pipe layout and help improve heat output through the floor. Overlay panels for retrofits, HeatBoard or routed boards for timber floors, and insulation for screeded floors.
Controls Manage room temperatures and heating schedules. Thermostats, wiring centres, actuators and smart controls for zoned heating.

Water Underfloor Heating System Types

Water UFH can be installed in several ways depending on the floor structure. In-screed systems are popular for new builds and extensions, overlay systems are often chosen for renovations, and routed board systems can be used where the floor deck and pipe channels need to work together.

System Type Best For Typical Products
In-Screed UFH New builds, extensions and new floor constructions. UFH pipe, pipe clips, edge insulation, manifold and pump unit.
Overlay UFH Retrofit projects and renovations where floor height needs to be kept low. Low-profile overlay boards, 12mm pipe, manifolds and controls.
Timber or Joisted Floor UFH Suspended timber floors, joisted floors and fit-from-above or fit-from-below installations. Aluminium spreader plates, routed boards, pipe fixings and suitable UFH pipe.
Heat Pump UFH Low-temperature heating systems and heat pump installations. UFH pipe, manifolds, heat pump compatible pump units, actuators and thermostats.

Frequently Asked Questions

What is water underfloor heating? Water underfloor heating, also called wet or hydronic underfloor heating, uses warm water flowing through pipework beneath the floor to heat the room evenly from the floor up.
Is water underfloor heating suitable for heat pumps? Yes, water UFH is well suited to heat pumps because it can operate effectively at lower flow temperatures than many traditional radiator systems.
What pipe size is used for water underfloor heating? 12mm pipe is often used for low-profile overlay systems, while 16mm pipe is commonly used for standard manifold-based water underfloor heating circuits.
Do I need a manifold for water underfloor heating? Most multi-loop water UFH systems use a manifold to distribute water to each circuit, balance flow and support zone control with actuators and thermostats.
Can water underfloor heating be retrofitted? Yes, water UFH can be retrofitted using overlay boards or low-profile panels, depending on the existing floor construction and available build-up height.