Semi-Rigid X-Riser Semi-Rigid X-Riser This field assembled service head type riser is appropriate for both new construction and PE service line renewals. The carbon steel casing can be used for rigid mounting while still allowing for flexible assembly underground. Use the model number system to build your fully customizable semi-rigid X-Riser. https://www.chicagofittings.com/wp-content/uploads/2025/03/CF-Risers-Overview-v1-copy.mp4