The Diamondback™ line of flexible gas piping has been expanded to include a higher capacity 1 1/4-in. dia to meet the higher Btu requirements of larger installations, such as luxury homes and condominium developments, says the company. According to third-party testing, the corrugated stainless steel tubing (CSST) offers the highest published flow rates among CSST manufacturers, the company says. The new 1 1¼4-in. dia system includes fittings, protective floppy conduit, and a Maxitrol regulator approved for supply pressures between 14-in. wc and 2 psi.