50mm UPVC Transparent Flap Check Valve – Non-Return Drain Set

50mm UPVC Transparent Flap Check Valve – Non-Return Drain Valve Set

Keep your kitchen and bathroom drains flowing in the right direction with this 50mm UPVC Transparent Flap Check Valve. Designed as a complete combination set, this non-return valve prevents backflow of water and unpleasant sewer gases from rising up through your drainpipes — keeping your home smelling fresh and your plumbing working efficiently.

The transparent UPVC body lets you visually inspect water flow without removing the valve, making maintenance fast and hassle-free. The stainless steel flap mechanism ensures durable, corrosion-resistant performance even in wet, high-use environments.

Key Features

• 50mm (2-inch) diameter – fits standard UPVC drainpipes in kitchens, bathrooms, and utility rooms
• Transparent UPVC body – easy visual flow inspection without disassembly
• Stainless steel flap – corrosion-resistant, long-lasting non-return mechanism
• Non-return / backflow prevention – stops wastewater and sewer gases from reversing into your drain
• Odour-blocking design – seals against sewer odours for a cleaner-smelling kitchen or bathroom
• Complete combination set – everything you need for a straightforward installation
• Easy DIY installation – no specialist tools required; compatible with standard UPVC pipe systems

Specifications

• Pipe Diameter: 50mm (2 inch)
• Body Material: UPVC (transparent)
• Flap Material: Stainless Steel
• Type: Flap Check Valve / Non-Return Valve
• Application: Kitchen drain, bathroom sewer, utility drainpipe
• Country of Origin: Made in China

What's Included

• 50mm UPVC Transparent Flap Check Valve
• Combination set accessories (as pictured)

Ideal For

• Kitchen sink drainpipes
• Bathroom floor drains and waste outlets
• Laundry and utility room drainage
• DIY plumbing upgrades and renovations

For more information on safe plumbing practices and drainage standards, visit the U.S. Consumer Product Safety Commission (CPSC).

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Frequently Asked Questions

Q: What pipe size does this UPVC check valve fit?

A: This flap check valve is designed to fit standard 50mm (2-inch) diameter UPVC drainpipes, making it compatible with most residential kitchen sinks, bathroom waste outlets, and utility drains.

Q: How does the non-return flap valve prevent sewer odours?

A: The stainless steel flap sits closed when water is not flowing, creating a physical seal that blocks sewer gases and unpleasant odours from rising back up through the drainpipe into your home. When water flows through, the flap opens automatically, then closes again once flow stops.

Q: Is the transparent body purely visual, or does it serve a functional purpose?

A: The transparent UPVC body serves both aesthetic and practical purposes. It allows you to visually monitor water flow and check for any blockages or debris build-up inside the valve without having to remove or disassemble it, saving time during routine maintenance.

Q: Can I install this check valve myself without a plumber?

A: Yes. This combination set is designed for straightforward DIY installation on standard UPVC drainage systems. No specialist tools are required. Simply ensure the pipe diameter matches (50mm) and follow the included fitting instructions for a secure, leak-free connection.