Polypipe UFH Ultra Flexible Barrier Pipe Coil 12mm | Overlay UFH System Pipe | 50m & 80m
12mm Barrier Pipe Overlay & Overlay Lite Systems UFH Only — Not for Plumbing
The Polypipe UFH 12mm Ultra Flexible Barrier Pipe Coil is the correct pipe for all Polypipe Overlay™ and Overlay™ Lite underfloor heating systems — the low-profile, over-the-floor UFH range designed for installation over existing solid or timber floors without excavation. At 12mm diameter, this ultra-flexible polybutylene barrier pipe fits directly into the grooves of the Overlay floor panels and the channels of the Overlay end returns (PB08573), producing a total installed system depth of just 18mm. Available in 50m (UFH5012B) and 80m (UFH8012B) coil lengths to match the circuit size requirement. UFH pipe only — not suitable for plumbing, gas, or potable water.
Available Variants — Select Length Above
| Coil Length | MPN | Typical Coverage @ 150mm centres | Best For |
|---|---|---|---|
| 50m | UFH5012B | Up to 15m² per circuit (including tails) | Single rooms — bathrooms, kitchens, conservatories up to ~15m² |
| 80m | UFH8012B | Up to 25m² per circuit (including tails) | Larger single rooms or two smaller circuits — most versatile Overlay coil size |
The Overlay system is designed for room-by-room circuits with a maximum circuit length of 80m (inclusive of connection tails). Each circuit should not exceed 80m; for larger areas, split into multiple circuits on the manifold. Polypipe Overlay panels are designed for circuits up to 15m² per panel run — larger rooms may require multiple circuits and multiple rows of panels with their own end returns.
The Overlay System — Over-the-Floor UFH
The Polypipe Overlay™ system is designed specifically for retrofit and renovation projects where traditional solid-floor underfloor heating is impractical — no excavation is required, and the entire system installs over the existing floor surface. The 12mm pipe clips into pre-formed grooves in the lightweight Overlay floor panels, which are bonded to each other using PB776 polyurethane expanding foam glue and connected at circuit ends using PB08573 Overlay end returns. The total finished system height — from existing floor surface to the top of the screed or board layer above — is just 18mm, making it compatible with most internal door clearances without modification. Because the 12mm pipe is smaller diameter than the 15mm solid floor pipe, the manifold connection requires PB181512 adaptor sets (15mm to 12mm).
Key Features & Benefits
- Ultra flexible polybutylene — significantly easier to route through the panel grooves than standard plumbing barrier pipe; reduces installation effort and time
- Integral oxygen barrier — prevents oxygen ingress and corrosion of boiler and system components
- 12mm diameter — system-specific — sized for the Overlay™ and Overlay™ Lite panel groove geometry; the Overlay system is designed around 12mm pipe throughout
- 18mm total system depth — with panel installed, the 12mm pipe sits within the panel groove at a total height of 18mm above the existing floor; lowest-profile water UFH system available
- Tested to BS EN ISO 15876 / 21003 — maximum 10 bar working pressure, 60°C maximum operating temperature
- Freeze resistant — temporary deformation rather than splitting in frost conditions provides on-site protection before the system is filled and commissioned
Technical Specifications
| Specification | Detail |
|---|---|
| Pipe diameter | 12mm |
| Material | Ultra flexible polybutylene |
| Oxygen barrier | Yes — integral |
| Maximum operating temperature | 60°C |
| Maximum working pressure | 10 bar |
| Standards | BS EN ISO 15876-1:2003 / BS EN ISO 21003-1:2008 |
| System compatibility | Polypipe Overlay™ and Overlay™ Lite floor panels only |
| Total installed system height | 18mm (panel + pipe + screed/board above) |
| Manifold connection | Requires PB181512 adaptor set (15mm manifold to 12mm pipe) |
| Not suitable for | Solid floor panel/clip rail systems, plumbing, gas, potable water |
| Available lengths | 50m (UFH5012B), 80m (UFH8012B) |
⚠️ Manifold Adaptor Required
Polypipe stainless steel and plastic manifolds have 15mm push-fit connections as standard. To connect 12mm Overlay pipe to a 15mm manifold, you must use PB181512 Adaptor Sets (15mm to 12mm, pack of 2) — one adaptor per circuit (flow and return). Order one pack of PB181512 per two circuits. Without these adaptors, the 12mm pipe cannot be connected to the manifold.
Original: $147.11
-65%$147.11
$51.49Polypipe UFH Ultra Flexible Barrier Pipe Coil 12mm | Overlay UFH System Pipe | 50m & 80m
12mm Barrier Pipe Overlay & Overlay Lite Systems UFH Only — Not for Plumbing
The Polypipe UFH 12mm Ultra Flexible Barrier Pipe Coil is the correct pipe for all Polypipe Overlay™ and Overlay™ Lite underfloor heating systems — the low-profile, over-the-floor UFH range designed for installation over existing solid or timber floors without excavation. At 12mm diameter, this ultra-flexible polybutylene barrier pipe fits directly into the grooves of the Overlay floor panels and the channels of the Overlay end returns (PB08573), producing a total installed system depth of just 18mm. Available in 50m (UFH5012B) and 80m (UFH8012B) coil lengths to match the circuit size requirement. UFH pipe only — not suitable for plumbing, gas, or potable water.
Available Variants — Select Length Above
| Coil Length | MPN | Typical Coverage @ 150mm centres | Best For |
|---|---|---|---|
| 50m | UFH5012B | Up to 15m² per circuit (including tails) | Single rooms — bathrooms, kitchens, conservatories up to ~15m² |
| 80m | UFH8012B | Up to 25m² per circuit (including tails) | Larger single rooms or two smaller circuits — most versatile Overlay coil size |
The Overlay system is designed for room-by-room circuits with a maximum circuit length of 80m (inclusive of connection tails). Each circuit should not exceed 80m; for larger areas, split into multiple circuits on the manifold. Polypipe Overlay panels are designed for circuits up to 15m² per panel run — larger rooms may require multiple circuits and multiple rows of panels with their own end returns.
The Overlay System — Over-the-Floor UFH
The Polypipe Overlay™ system is designed specifically for retrofit and renovation projects where traditional solid-floor underfloor heating is impractical — no excavation is required, and the entire system installs over the existing floor surface. The 12mm pipe clips into pre-formed grooves in the lightweight Overlay floor panels, which are bonded to each other using PB776 polyurethane expanding foam glue and connected at circuit ends using PB08573 Overlay end returns. The total finished system height — from existing floor surface to the top of the screed or board layer above — is just 18mm, making it compatible with most internal door clearances without modification. Because the 12mm pipe is smaller diameter than the 15mm solid floor pipe, the manifold connection requires PB181512 adaptor sets (15mm to 12mm).
Key Features & Benefits
- Ultra flexible polybutylene — significantly easier to route through the panel grooves than standard plumbing barrier pipe; reduces installation effort and time
- Integral oxygen barrier — prevents oxygen ingress and corrosion of boiler and system components
- 12mm diameter — system-specific — sized for the Overlay™ and Overlay™ Lite panel groove geometry; the Overlay system is designed around 12mm pipe throughout
- 18mm total system depth — with panel installed, the 12mm pipe sits within the panel groove at a total height of 18mm above the existing floor; lowest-profile water UFH system available
- Tested to BS EN ISO 15876 / 21003 — maximum 10 bar working pressure, 60°C maximum operating temperature
- Freeze resistant — temporary deformation rather than splitting in frost conditions provides on-site protection before the system is filled and commissioned
Technical Specifications
| Specification | Detail |
|---|---|
| Pipe diameter | 12mm |
| Material | Ultra flexible polybutylene |
| Oxygen barrier | Yes — integral |
| Maximum operating temperature | 60°C |
| Maximum working pressure | 10 bar |
| Standards | BS EN ISO 15876-1:2003 / BS EN ISO 21003-1:2008 |
| System compatibility | Polypipe Overlay™ and Overlay™ Lite floor panels only |
| Total installed system height | 18mm (panel + pipe + screed/board above) |
| Manifold connection | Requires PB181512 adaptor set (15mm manifold to 12mm pipe) |
| Not suitable for | Solid floor panel/clip rail systems, plumbing, gas, potable water |
| Available lengths | 50m (UFH5012B), 80m (UFH8012B) |
⚠️ Manifold Adaptor Required
Polypipe stainless steel and plastic manifolds have 15mm push-fit connections as standard. To connect 12mm Overlay pipe to a 15mm manifold, you must use PB181512 Adaptor Sets (15mm to 12mm, pack of 2) — one adaptor per circuit (flow and return). Order one pack of PB181512 per two circuits. Without these adaptors, the 12mm pipe cannot be connected to the manifold.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
12mm Barrier Pipe Overlay & Overlay Lite Systems UFH Only — Not for Plumbing
The Polypipe UFH 12mm Ultra Flexible Barrier Pipe Coil is the correct pipe for all Polypipe Overlay™ and Overlay™ Lite underfloor heating systems — the low-profile, over-the-floor UFH range designed for installation over existing solid or timber floors without excavation. At 12mm diameter, this ultra-flexible polybutylene barrier pipe fits directly into the grooves of the Overlay floor panels and the channels of the Overlay end returns (PB08573), producing a total installed system depth of just 18mm. Available in 50m (UFH5012B) and 80m (UFH8012B) coil lengths to match the circuit size requirement. UFH pipe only — not suitable for plumbing, gas, or potable water.
Available Variants — Select Length Above
| Coil Length | MPN | Typical Coverage @ 150mm centres | Best For |
|---|---|---|---|
| 50m | UFH5012B | Up to 15m² per circuit (including tails) | Single rooms — bathrooms, kitchens, conservatories up to ~15m² |
| 80m | UFH8012B | Up to 25m² per circuit (including tails) | Larger single rooms or two smaller circuits — most versatile Overlay coil size |
The Overlay system is designed for room-by-room circuits with a maximum circuit length of 80m (inclusive of connection tails). Each circuit should not exceed 80m; for larger areas, split into multiple circuits on the manifold. Polypipe Overlay panels are designed for circuits up to 15m² per panel run — larger rooms may require multiple circuits and multiple rows of panels with their own end returns.
The Overlay System — Over-the-Floor UFH
The Polypipe Overlay™ system is designed specifically for retrofit and renovation projects where traditional solid-floor underfloor heating is impractical — no excavation is required, and the entire system installs over the existing floor surface. The 12mm pipe clips into pre-formed grooves in the lightweight Overlay floor panels, which are bonded to each other using PB776 polyurethane expanding foam glue and connected at circuit ends using PB08573 Overlay end returns. The total finished system height — from existing floor surface to the top of the screed or board layer above — is just 18mm, making it compatible with most internal door clearances without modification. Because the 12mm pipe is smaller diameter than the 15mm solid floor pipe, the manifold connection requires PB181512 adaptor sets (15mm to 12mm).
Key Features & Benefits
- Ultra flexible polybutylene — significantly easier to route through the panel grooves than standard plumbing barrier pipe; reduces installation effort and time
- Integral oxygen barrier — prevents oxygen ingress and corrosion of boiler and system components
- 12mm diameter — system-specific — sized for the Overlay™ and Overlay™ Lite panel groove geometry; the Overlay system is designed around 12mm pipe throughout
- 18mm total system depth — with panel installed, the 12mm pipe sits within the panel groove at a total height of 18mm above the existing floor; lowest-profile water UFH system available
- Tested to BS EN ISO 15876 / 21003 — maximum 10 bar working pressure, 60°C maximum operating temperature
- Freeze resistant — temporary deformation rather than splitting in frost conditions provides on-site protection before the system is filled and commissioned
Technical Specifications
| Specification | Detail |
|---|---|
| Pipe diameter | 12mm |
| Material | Ultra flexible polybutylene |
| Oxygen barrier | Yes — integral |
| Maximum operating temperature | 60°C |
| Maximum working pressure | 10 bar |
| Standards | BS EN ISO 15876-1:2003 / BS EN ISO 21003-1:2008 |
| System compatibility | Polypipe Overlay™ and Overlay™ Lite floor panels only |
| Total installed system height | 18mm (panel + pipe + screed/board above) |
| Manifold connection | Requires PB181512 adaptor set (15mm manifold to 12mm pipe) |
| Not suitable for | Solid floor panel/clip rail systems, plumbing, gas, potable water |
| Available lengths | 50m (UFH5012B), 80m (UFH8012B) |
⚠️ Manifold Adaptor Required
Polypipe stainless steel and plastic manifolds have 15mm push-fit connections as standard. To connect 12mm Overlay pipe to a 15mm manifold, you must use PB181512 Adaptor Sets (15mm to 12mm, pack of 2) — one adaptor per circuit (flow and return). Order one pack of PB181512 per two circuits. Without these adaptors, the 12mm pipe cannot be connected to the manifold.
