This type of Riser Pipe is engineered with an injection moulded, heavy duty threaded coupler that provides a strong, leak-resistant connection between successive pipe lengths. The coupler is manufactured using high-strength engineering plastic through an injection moulding process, giving it dimensional consistency, resistance to cracking, and a tight, reliable threaded fit that is easy to assemble and dismantle during installation or maintenance. This riser pipe is purpose-built for compatibility with India Mark II and India Mark III hand pump systems, which are widely deployed in rural and community water supply schemes across India and other developing regions. The heavy duty coupler design reduces the risk of joint failure under repeated pumping stress and helps maintain a consistent water column as the pipe transports water from the submerged cylinder assembly up to the pump head. This makes it a dependable choice for installations requiring standardized, easy-to-maintain riser pipe assemblies.