squarcly against shoulder of fitting. Solder feed hole shall be completely filled and solder shall appear at end of fitting for full circumference. 19-17. PITCH OF PIP’S: a. All Soil and ‘“‘aste lines shall run at a uniform grade of not Tess than 1/] inch per foot where practical. there this is impractical due to the depth of the sewer main, a fall of not less than 1/8 inch per foot mey be used. b. All Hot later, Cold Water, Air and Gas lines shall be laid to drain, and runs shall be free from sags or traps. 16-13, PIPE SUPPORTS: Aluminum angle or strap hangers fasten- ed to the building purlins and as detailed on the drawings shal shall be used to support all overhead piping at intervals of not more than ten (10) feet, 19-19, CLEANOUTS: Cleanouts shall be placed where indicated on the drawings. ‘here lines are in ground under floor, clean-~ outs shall be brought to the floor line and provided with brass cleanout plugs flush with the floor, 19-20. PIPE CONNECTIONS: All apparatus, fixtures and appliances, which recuire pipe connections, shall be so equipped, and each such pipe connection shall be valved or trapped or provided with special control apparatus as shown on the drawings or elsewhere specified. Where such connections are not shown on the drawings, they shall be made in the usual manner recommended by common practice, and, in the case of special equipment, as recommended by the manufacturer of such equipment. 19-21. COVERING: & Cover all hot water piping with standard thick- ness 85% Magnesia insulation in sectional form with canvas jackets and metal bands. Cover all valves and fittings in these lines with 85% Magnesia Cement and recover with 8 ounce canvas neatly pasted on, db. Hot Vater Storage Heaters shall be covered with poultry wire mesh and plastered with I-1/2" thick 85% Magnesia insulating cement troweled smooth. 19-22. CLEANING TCUIPMENT: All exposed piping, apparatus, and equipment shall be thoroughly cleaned of all cement, dirt and other foreign materials. All grease or oil spots shall be removed with gasoline. ‘11 surfaces shall be carefully wiped and all cracks and corners scraped out, 19-7 All fixtures 4