Insulated pipes for outdoor potable water piping in areas such as apartment and row house areas, detached houses, and farms. The corrugated polyethylene (PE) protective pipe of MX-Saniflex systems provides high ring stiffness but a flexible structure. The cross-linked closed-cell PEX foam used as insulation ensures good thermal insulation values (0.037 W/mk) and a flexible structure. The flow pipe is made of cross-linked PEX pipe, which has excellent thermal properties. MX-Saniflex pipe systems are available as both single-flow (Single) and double-flow (Twin) pipe elements.