Description
Reliable Pressure Management: The R24 External Filling Loop
Low boiler pressure is one of the most common causes of heating system inefficiency and “no-heat” call-outs. The R24 Filling Loop is a vital tool for every homeowner and engineer, providing a temporary connection to the mains water supply to re-pressurize sealed heating systems. By using this universal boiler filling loop, you can ensure your radiators are hot and your hot water is consistent, all while protecting your boiler’s internal components from the strain of low-pressure operation.
The Sustainable Choice for System Longevity
At ECO Heat Shop, our mission is to provide hardware that supports a greener, more efficient home. A central heating filling loop that functions correctly is key to preventing “dry-firing” and system errors, which can lead to expensive repairs and unnecessary electronic waste. The R24 is built with longevity in mind, using corrosion-resistant materials that withstand the high-pressure demands of the UK’s mains water supply.
Key Features & Benefits
- Universal Compatibility: The R24 boiler filling loop valve is designed to fit standard 15mm copper piping found in the majority of UK combi and system boiler setups.
- WRAS Compliant Design: Manufactured to meet safety standards, ensuring no backflow into the primary water supply, keeping your drinking water safe.
- High-Quality Braided Hose: The flexible, reinforced stainless steel hose allows for easy installation even in tight cupboards or behind boiler casings.
- Dual Isolation Valves: Features two high-quality thumb-turn valves for precise control during the boiler top up process.
- Tool-Free Operation: Once installed, the filling loop for central heating pressure can be operated by hand, making it accessible for quick home maintenance.
Technical Specifications
| Technical Data Summary |
| Product Type |
External Filling Loop (R24) |
| Connection Size |
15mm Compression Fittings |
| Hose Material |
Reinforced Flexible Braided Stainless Steel |
| Valve Material |
Durable Forged Brass |
| System Type |
Sealed Central Heating / Combi Boilers |
| Compliance |
Designed to meet UK Water Regulations |
Installation & Safety Guidance
The heating system filling loop should be connected between the cold water mains and the central heating return pipe. Once the desired pressure (typically 1.0 to 1.5 bar) is reached, both valves must be closed, and the flexible hose should ideally be removed and stored nearby to comply with local water bylaws. This prevents any accidental over-pressurization or cross-contamination.
Expert Tip: If you find yourself using your R24 filling loop more than once or twice a year, you may have a small leak or an expansion vessel issue. Regular pressure drops reduce your system’s efficiency—contact a Gas Safe engineer to ensure your eco-friendly heating system is running perfectly.
Why Buy from ECO Heat Shop?
We stock only trade-quality filling loops for combi boilers that we trust for our own installations. When you buy from us, you are supporting a UK-registered business dedicated to sustainable, energy-efficient heating solutions.
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