WELD COIL GAS 18 (Hotsy 771) Pacific Bay Equipment Sale! from $1,660.00 Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Gas Fired Coil Fits 771, 772 Heavy-duty schedule 80 carbon steel pipe Best warranty in the industry Sized to water flow for maximum heat rise Wound specifically for oil and gas fired applications