The McAlpine R29-NRV 90° Elbow with integral Non-Return Valve is a plumbing component designed to connect a plain tail inlet to a 19/23mm universal outlet. This durable polypropylene elbow features an integral non-return valve to prevent backflow and contamination, ensuring unidirectional fluid flow. Its 90° design promotes efficient water flow. The elbow is easy to install in residential and commercial plumbing systems and complies with UK building regulations, making it suitable for new builds, renovations, and repairs. It's a reliable and efficient choice for plumbers and DIY enthusiasts.