PSC 135.125 Design of copper pipe addition [49 CFR 192.125]. PSC 135.163 Compressor stations: design and construction additions [49 CFR 192.163]. PSC 135.171 Compressor stations: additional safety equipment addition [49 CFR 192.171]. PSC 135.173 Compressor stations: ventilation addition [49 CFR 192.173]. PSC 135.181 Distribution line valves addition [49 CFR 192.181]. PSC 135.183 Vaults: structural design requirements additions [49 CFR 192.183]. PSC 135.187 Vaults: sealing, venting, and ventilation addition [49 CFR 192.187]. PSC 135.189 Vaults: drainage and waterproofing additions [49 CFR 192.189]. PSC 135.195 Protection against accidental overpressuring additions [49 CFR 192.195]. PSC 135.197 Control of the pressure of gas delivered from high-pressure distribution systems additions [49 CFR 192.197]. PSC 135.199 Requirements for design of pressure relief and limiting devices additions [49 CFR 192.199]. PSC 135.279 Copper pipe addition [49 CFR 192.279]. PSC 135.307 Inspection of materials addition [49 CFR 192.307]. PSC 135.309 Repair of steel pipe addition [49 CFR 192.309]. PSC 135.319 Installation of pipe in a ditch additions [49 CFR 192.319]. PSC 135.321 Installation of plastic pipe additions [49 CFR 192.321]. PSC 135.325 Underground clearance addition [49 CFR 192.325]. PSC 135.355 Customer meters and regulators: protection from damage additions [49 CFR 192.355]. PSC 135.365 Service lines: location of valves addition [49 CFR 192.365]. PSC 135.371 Service lines: steel addition [49 CFR 192.371]. PSC 135.375 Service lines: plastic addition [49 CFR 192.375]. PSC 135.377 Service lines: copper additions [49 CFR 192.377]. PSC 135.457 External corrosion control: buried or submerged pipelines installed before August 1, 1971 addition [49 CFR 192.457]. PSC 135.505 Strength test requirements for steel pipeline to operate at a hoop stress of 30 percent or more of SMYS addition [49 CFR 192.505]. PSC 135.511 Test requirements for service lines addition [49 CFR 192.511].