ground, shall be "Alcoa", or equal, iron pipe size standard aluminum pipe, 63S-T6 anodized, All connections from aluminum pipe or fittings so brass, iron or steel pipe or fittings shall be made with plastic nipples or fittings when plastic nipples or fittings are available. “hen plastic nipples and fittings are not available direct connections between lines, or lines and fittings of dissimilar metals may be made upon direction of the Engineer. "“Parmelee" pipe wrenches shall be used in making-up aluminum pipe. d. All O11 Lines and “’ater Service lines shall be tyove K soft copper tubing, conforming to Federal Specification "7-7-799a, e. All Air lines shall be Class A standard weight black steel pipe, cmforming to Federal Specification WV-P-lL06. f, All Plastic Pipe and Nipples shall be I.P.S. Mills plastic made of Saran. ge Substitution of Materials: Aluminum pipe may be substituted for plastic pipe, upon direction of the Engineer, when plastic pipe is not available. h. Relocation of Lines; ‘ater lines within the structures maybe relocated where deemed necessary or expedlent by the Lngineer, in order to economically use available lengths of pipe. 19-1). FITTINGS: @. all fittings in Cast Iron lines shall be of the same material, weight and quality as the pipe, and conform to Federal Specification 'T’-P-l,01. b. All Fittings in Steel Waste lines shall be standard weight, black, beaded, recessed, screwed drainage fittings, conforming to Federal Specification "W-P-l9la, ec. All Fittings in Aluminum lines shall be I.P.S. cast aluminum, anodized. d. All Fittings in Steel Air lines shall be standard weight, galvanized, beaded, screwed malleable iron fittings, conforming to Federal Specification “M-P-52lb. e. All Fittings in Copper 011 lines shall be Streamline, or equal, brass soldered fittings, conforming to Ameri- can Standard Association Standards A l.0.3-19)1. 19-5 Solder and