Flexible rubber saddle taps Clay, Thickwall Concrete (min. 1 14" O.D.) sewer mains to Plastic lateral pipe. Replaces T-fittings. Withstands hydrostatic pressure testing up to 4.3 psi. Non-pressure, gravity flow applications only. Recommended for underground installations. Minimal excavation and tool use (Diamond Tip Core Bit, Core Drill, Strap Wrench and a FLEX-SEAL ARC Shielded Adjustable Repair Sewer Coupling). Easy to install and reuse.