Primaflow QQM Isolating Valve - 15mm - Full Flow - 570500
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Product Information
Full details
The Primaflow QQM Isolating Valve (15mm) is designed for professional plumbers and DIY enthusiasts who require reliable water flow control within residential or commercial plumbing systems. Its primary benefit is a full-flow design that effectively minimizes pressure loss, ensuring efficient system performance; however, users should ensure the valve is oriented correctly relative to the flow direction to maintain optimal operation.
All features
| Model Part Number | 570500 |
|---|---|
| Brand | Primaflow |
Extended Product Information
FAQs
Is this valve suitable for central heating systems?
Yes, the Primaflow QQM is designed for versatile use in both hot and cold water systems, including central heating circuits.
Does this valve meet UK plumbing regulations?
Yes, it is WRAS approved, which ensures it complies with strict UK water safety and performance regulations.
Can this be used with plastic pipes?
Yes, provided you use the correct pipe inserts to support the plastic pipe within the compression joint.
What does 'Full Flow' mean?
Full flow means the internal bore of the valve is not significantly restricted, allowing water to pass through with minimal pressure loss compared to standard valves.
Does the valve need regular maintenance?
While not strictly required, operating the valve occasionally helps prevent the internal mechanism from seizing due to limescale build-up.
Troubleshooting
Valve leaking at the connection point
Ensure the olive is seated correctly and the nut is tightened to the proper torque; if the leak persists, check for damage to the pipe or fitting.
Handle is difficult to turn
Check for external debris or mineral buildup; apply a food-safe silicone lubricant if necessary and gently cycle the handle.
Reduced water flow even when fully open
Verify the valve is fully in the 'open' position and inspect the pipework upstream for other blockages.
Pros and Cons
Pros
- Minimizes pressure loss due to full-flow architecture
- Fully WRAS approved for UK regulatory compliance
- Standard 15mm sizing fits most residential pipes
- Reliable shut-off capability for maintenance tasks
Cons
- Requires proper orientation for best performance
- Limited to 15mm pipe diameter installations
- Manual turn handle requires physical clearance
Setup, Compatibility & Care
To install the valve, ensure the pipework is clean and free of debris at the connection point. Use appropriate compression fittings if the valve is not already integrated, and always apply PTFE tape to threads if required by the specific fitting type. Check for leaks after tightening the nuts; a quarter turn beyond hand-tight is often sufficient for a proper seal. For maintenance, periodically turn the valve handle through its full range of motion to prevent mineral deposits from seizing the internal mechanism. Ensure the valve is not subjected to extreme mechanical strain or excessive overtightening, as this can deform the internal seat.