A reliable, Part L‑compliant lever check valve is essential for any combi boiler that lacks a built‑in filling loop. This 15 mm × 15 mm straight filling loop connects your mains water supply directly to the central‑heating circuit, letting you top‑up or adjust boiler pressure quickly and safely.
Why it works for you
– Easy installation – a 520 mm braided steel hose with compression nuts and olives fits snugly onto standard 15 mm fittings.
– Secure isolation – the ergonomic lever (EDPM/PVCS) shuts the flow instantly, while the double check valve prevents back‑flow, protecting both the boiler and the mains.
– Part L compliance – meets UK energy‑efficiency and environmental standards, giving you peace of mind and helping you stay within legal requirements.
Key specifications
| Feature | Detail |
|---|---|
| Connection size | 15 mm × 15 mm |
| Total length | ~520 mm |
| Thread length | ~370 mm |
| Valve material | Chromed brass |
| Hose material | Braided steel |
| Lever material | EDPM / PVC |
| Suitable for | Hot‑water central heating systems |
Whether you need to re‑pressurise a low‑pressure boiler or release excess pressure, this lever check valve delivers precise control with minimal effort. Its durable construction and flexible hose make it a perfect replacement part for residential or small‑commercial combi boilers. Keep your heating system running smoothly—install this trusted filling loop today.
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