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Polypipe 15mm Polybutylene Barrier Pipe

From £436.79
Now £436.79
in stock, ready to be shipped
in stock, ready to be shipped
Only 9 left!
Polypipe 15mm Polybutylene Barrier Pipe
From £219.59
Now £219.59
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The Polypipe 15mm Polybutylene Barrier Pipe is a high-quality system suitable for a wide range of applications. With its superior strength and durability, this pipe can handle working pressures of up to 12 bar at 20 degrees centigrade (or 6 bar at 90 degrees centigrade), making it suitable for demanding environments.

When it comes to installation, the Polypipe Barrier Pipe offers flexibility. It can be bent to a radius of 12 times the diameter when unsupported or 8 times the diameter when supported, allowing for versatile and efficient routing. The connections and fittings of the system are rigorously tested to BS 7291: Class S standards, ensuring thermal cycling resilience, long-term pressure resistance, rapid pressure testing, and reliable pull-out strength.

The Polypipe Barrier Pipe is designed to withstand a wide range of temperatures. It undergoes rigorous testing according to BS 7291, including pressurized thermal cycling and exposure to temperatures of 114 degrees centigrade at 3.5 bar pressure for 1,000 cycles. This ensures its durability and performance even under challenging conditions.

It is important to note that the Polypipe system is not suitable for the transportation of gases. The standard Polyplumb pipe is oxygen permeable, making it suitable for domestic water and heating installations. To minimize the risk of oxygen ingress, especially in floor central heating systems, Polypipe recommends using barrier pipe throughout underfloor heating applications.

The Polyplumb pipes and fittings are approved by the Water Regulations Advisory Scheme (WRAS) and comply with WRC standards. The material is resistant to scale build-up, ensuring long-term reliability. While short-term chlorination and normal chlorine levels in UK domestic water supplies do not adversely affect Polyplumb, it is not recommended for systems with high chlorine concentrations, such as those used in swimming pools.

UV protection is important for the Polypipe system, as it should be shielded from direct sunlight. Standard decorating paints or pipe insulation can provide sufficient protection for external use.

The Polyplumb system excels in acoustic performance, minimizing noise transmission and water hammer effects compared to rigid pipe systems.

As Polyplumb pipe does not conduct electricity, fewer equipotential bonding requirements are typically needed compared to metal systems. However, guidelines from the Institution of Engineering and Technology (IEE) and the Institute of Physics (IoP) should be followed for proper earth bonding. In cases where Polyplumb interrupts the continuity of existing metal pipes used for earthing or bonding, it is necessary to reinstate this continuity by affixing permanent earth clips and a section of earth cable between the ends of the copper pipe.

Polypipe assures users that there are no known side-effects from handling or using Polyplumb, ensuring peace of mind during installation and use.

Jointing the Polyplumb system involves six stages for successful connections. These instructions are applicable for hot and cold water or heating applications, including floor heating. Cutting the Polyplumb pipe should be done with approved pipe cutters (such as PB777 or PB778) to ensure precise and clean cuts. The use of pipe stiffeners is essential when using Polyplumb pipe with Polyplumb or compression fittings, ensuring a secure and reliable joint.

  • Material: Polybutylene
  • Length: 100m
  • Colour: Grey
  • Supplied in a coil in heavy duty plastic bag
  • Outside Diameter: 15mm
  • Suitable for all plumbing and heating applications as a flexible alternative to copper tube
  • Suitable in both hard and soft water areas.
  • Our Barrier Pipes are tested DIN 4726 and DIN 4727
  • Manufactured in accordance with BS EN ISO 9002 (BSI registered firm Certificate FM00318)
  • WRAS approved
  • KIWA/KOMO approved (Certificate numbers K14341, 14342 and 14343)
  • Polyplumb manufactured by Polypipe
  • BBA Certified - Polyplumb polybutylene barrier pipe, fittings and accessories are covered by BBA Certificate Number 00/3699.
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At The Underfloor Heating Store, we strive to make every step of your order as easy and convenient as possible, from finding the right underfloor heating setup to best suit you to taking delivery of your system the very next day.

We're proud to offer a range of delivery options to suit you, including free delivery on all of our orders or next working day delivery for a fixed price of £4.99

  • 2-3 working days delivery - FREE (Order before 4pm Monday - Friday)
  • Next working day - £4.99 (Order before 4pm Monday - Friday, applies to orders over £19.99)
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At The Underfloor Heating Store, our customers have 30 days to upgrade, replace or refund their orders.


At The Underfloor Heating Store, we want to ensure you are happy with every purchase you make. If you have any issues with your chosen product, whether damaged, faulty or simply an unwanted item, you can simply return what you bought for a refund. Learn more.


We take great care in the delivery of all of our products, however, in the event of your delivery arriving damaged or if you notice a manufacturing fault of any kind within 48 hours of delivery, you're within your rights to a replacement. Learn more.


Within 14 days of purchasing from us, you are eligible to upgrade if you deem you want something a little better. Simply send it back to us brand new and we'll happily assist you with an upgrade to your order. Learn more.

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At The Underfloor Heating Store, we are committed to providing our customers with high-quality products and outstanding customer service. That's why we offer a comprehensive warranty on all of our underfloor heating products, with a lifetime warranty for our ProWarm range of products.

Our warranties are designed to give you peace of mind and ensure that your underfloor heating system operates reliably for years to come.

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