V&G Part L 15mm Compression Straight Filling Loop

The V&G Part L 15mm Compression Straight Filling Loop is a high-quality, reliable solution for topping up sealed central heating systems. Manufactured by Valogin, this filling loop is designed to meet the latest Part L Building Regulations, helping ensure energy-efficient and compliant installation in domestic heating systems. This straight filling loop features a flexible braided hose that makes installation easier—even in tighter spaces—while providing long-lasting durability. It comes pre-fitted with a chrome-plated (CP) isolating valve and a CP isolating double check valve, giving you full control and backflow protection during the filling process. These components are essential for preventing contamination of the mains water supply, maintaining both system safety and hygiene. Ideal for combination boilers that do not include a built-in filling loop, this product allows you to safely connect the mains cold water to the sealed heating circuit. It’s an essential piece of kit for topping up system pressure when required, such as after bleeding radiators or performing maintenance.

Frequently Asked Questions

What does "Part L compliant" mean?

Part L compliance means the filling loop meets current UK Building Regulations related to the conservation of fuel and power. It ensures the component supports energy-efficient operation and system integrity.

Why do I need a double check valve on a filling loop?

A double check valve prevents water from the heating system flowing back into the mains supply. This protects your drinking water from potential contamination and is a legal requirement in many systems.

Can I use this with any combi boiler?

Yes, this filling loop is compatible with most combi boilers that do not have an integrated filling loop. Just make sure your system uses 15mm compression fittings for proper installation.

Check out our full range of plumbing supplies.

Browse more compression fittings available online.

At JJ Building Materials, we're committed to supplying quality building products at competitive prices, backed by the service and expertise you'd expect from an established independent merchant. Whether you're a trade professional managing large-scale projects or a homeowner taking on a DIY renovation, we're here to help you find the right products for the job.

As part of the JJ Roofing Supplies Group, we build on decades of experience supplying construction materials across the UK. We've expanded beyond roofing to offer a growing range of building materials, including timber, insulation, landscaping products, plumbing supplies, flooring, doors, bricks, fencing, garden buildings and much more – all available to order online with nationwide delivery.

We work with many of the industry's leading manufacturers to bring you trusted products that meet the highest standards of quality and performance. Our team is passionate about providing excellent customer service, competitive pricing and a straightforward shopping experience from start to finish.

When you shop with JJ Building Materials, you can expect:

• Competitive prices on leading brands and quality products.
• Nationwide delivery across the UK
  
• A constantly expanding range of building and landscaping materials.
  
• Friendly, knowledgeable customer support.
  
• A trusted business backed by the JJ Roofing Supplies Group.
  

Every order is personally reviewed by our experienced team to ensure everything is correct before dispatch. We offer delivery from as little as the next working day on selected products, so please refer to the dark blue Estimated Delivery box above for the expected delivery timeframe for this item.

We work with trusted manufacturers and specialist delivery partners to ensure your order arrives safely and on time. You'll receive tracking details once your order has been dispatched, and if we need to confirm any delivery details, one of our team will contact you directly to keep everything running smoothly.