Infloor® tubes are embedded directly in the concrete slab or soil. Due to the high Cv rating (14.4), the High Capacity manifolds can service one or two 450-foot (135 m) lengths of 1/2" (13 mm) tube; or one 1,000-foot (300 m) length of 3/4" (19 mm) tube per manifold section. With eight supply/return modules, reset control with sensors, circulating pump, air vents and drains, preassembled High Capacity manifolds can deliver up to 300,000 Btu/hr (88,000 W). Characteristics PEX BPEX Performance Characteristic ASTM 876 ASTM 876 SDR 9 9 Oxygen Barrier ---- EVOH DIN ---- 4726 PSI 100 (689 kPa) 100 (689 kPa) Temperature 180 °F (82 °C) 180 °F (82 °C) Linear Expansion 1.1 in./(10 °F 100 ft) 1.1 in./(10 °F 100 ft) Thermal Conductivity 2.7 Btu in./hr ft(squared) °F 2.7 Btu in./hr ft(squared) °F Quick Burst Strength @ 73 °F 440 psi 440 psi Sizes 3/8"(10 mm) 1/2"(13 mm) 3/4"(19 mm) 3/8"(10 mm) 1/2"(13 mm) 3/4"(19 mm) Bend Radius 3/8" 1/2" 3/4" 6 x o.d. 6 x o.d. 6 x o.d. 6 x o.d. 6 x o.d. 6 x o.d. Warranty 25 yrs. 25 yrs.