When should I use an anti-syphon or resealing trap?

Generally, the waste pipe or discharge pipe from an appliance is beyond the limitations of an unvented waste pipe. Usually more critical on the basin and bidet Wastes.

What is the difference between an anti-syphon trap and a re-sealing trap?

A re-sealing is designed to allow air to pass through the water seal under negative pressure but will retain sufficient water. An anti siphon trap has a small mechanical valve which opens under negative pressure.

Why does water not run away in my shower?

If it is not due to the obvious reason of a blockage caused by a buildup of debris, the problem could be due to back pressure within the discharge pipe.

What is the maximum thickness of bath that your bath fillers can be installed on?

The maximum thickness of the bath is 20mm and unfortunately, we do not make an extension ferrule to extend that length.

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💧 Keep Your Boiler Flowing Smoothly!

📏 VERSATILE SIZING - Compatible with 19/23mm pipework for flexible installation options.
🔧 EASY INSTALLATION - Designed for hassle-free setup, making it a must-have for any plumbing project.
🌟 LIGHTWEIGHT DESIGN - Weighing only 60g, it’s easy to handle without compromising on durability.
🚫 WASTE WATER PREVENTION - Safeguards your condensing boiler from unwanted waste water.
🏗️ REGULATORY COMPLIANCE - Meets BS 6798:2009 standards, ensuring peace of mind and safety.

The McAlpine CONVALVE is a vertical non-return valve designed to prevent waste water from entering condensing boilers, ensuring compliance with BS 6798:2009 and Building Regulations Approved Document H. With a compact size of 12 x 5 x 15 cm and a lightweight design of just 60g, it offers easy installation and versatile compatibility with 19/23mm pipework.

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Manufacturer	McAlpine
Part Number	CONVALVE
Product Dimensions	12 x 5 x 15 cm; 60 g
Item model number	CONVALVE
Colour	White
Item Package Quantity	1
Number of Pieces	1
Measurement System	Metric
Included Components	trap; fittings;
Batteries included?	No
Batteries Required?	No
Item Weight	60 g

McAlpine CONVALVE in-Line Vertical Non-Return Valve, White

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