Dial 50 ft. Line Set - 1/4" + 1/2" x 1/2" Item #1451852 | Model #4KA503804 The 10 year battery backup

The 10 year battery backup allows for continued monitoring

Can be installed from 1/8-in up to 1-in in a single pour

This unit is a UL Listed product with a 5-year limited warranty

This is an inexpensive solution to replacing the whole set

Dial 50 ft. Line Set - 1/4" + 1/2" x 1/2" Item #1451852 | Model #4KA503804 The 10 year battery backupLine sets are the copper lines which connect an outdoor condensing unit heat pump to an inside air handler or evaporator coil. Line sets are available in different lengths and diameters to fit most applications. Seamless Copper Tubing (ASTM B280) Tear Resistant Polyethylene Insulation (K Value 0. 035 W mK) Flame Retardant Insulation (UL94 HF 1) Dust Prevention Protective Caps Fitting End Type Flare Liquid Line Size 1 4 in. Suction Line Size 1 2 in.