should  be  well-supported  to  eliminate  sagging. Backfilling  will  be  well-tamped  in  (i-inch  layers. 15.   1a-03.   SANITARY  SEWER,  ABOVE- GROUND  level,  must  be  as  specified  for  the belowground level, except waste lines and vent piping above the ground must be of zinc-coated, standard- weight, screwed-end steel pipe and cast iron, recessed, long radius, screwed drainage fittings, and graded not less than 1/8 inch per foot. The sanitary sewer vent will extend full size through the roof for a distance of not less than 12 inches, where it must be flashed with suitable corrosion-resistant  metal  before  the  roofing  is  installed. A 4-inch cleanout will be provided slightly above the ground elevation at the base of the soil stack. All male screw ends will be coated with a good grade pipe joint compound before entering into fittings. The bathtub trap must be provided with a 3/4-inch brass, screw dram plug; all lines must be properly supported from the floor joists  with  suitable  hangers.  A  closet-bowl  floor connection  must  have  a  cast-iron  closet-bowl  floor flange with provisions for anchoring the brass closet- bowl bolts and an approved type of horn gasket. The finished joint must be absolutely leakproof, and the bowl will sit squarely on the finished floor. 15. 1a-04. WATER PIPING BURIED IN THE GROUND  must  be  jointless,  type  "K,"  soft  copper tubing. No kinking of the tube will be allowed. 15.  1a-05  WATER  PIPING  ABOVEGROUND level must be type "L," hard copper tubing with solder- type fittings, except that vertical lines may be of type "L," soft copper tubing. All tubing lines will be properly anchored to the floor joists to eliminate pipe sag and vibration and pitched to the main shutoff valve for draining, when necessary. A hose bib will be provided at the rear of the building with a stop and waste located inside the foundation wall for winter cutoff and waste and arranged for complete drainage of the line from the hose bib. Slip-joint connections will not be permitted below  the  finished  floor. 15.  1a-06.  Fixtures  must  be  of  a  reliable manufacturer and will be as follows: (a)    The KITCHEN SINKS will have a left- hand drainboard and be of cast iron with a smooth, white,  acid-resisting  porcelain  enamel  finish,  54  inches long by 25 inches wide by 35 inches high from floor to top of rim. The trim will be chromium plated, including combination mixing faucets with a soap dish, a large basket-type strainer with a 1 1/2-inch tailpiece, and a 1 1/2-inch wall-type P-trap. Hot- and cold-water supply lines in the sink cabinet will be provided with copper tubing valves. The cabinet will be of a heavy gauge steel with a baked-on, white enamel finish and have at least two  sliding  drawers. (b) The LAUNDRY TRAY will be of the double compartment, cement type, 48 inches long by 20 inches wide by 32 inches high from floor to rim and be of a smooth cement mixture to withstand sudden temperature  changes  without  cracking  or  leaking.  Tubs will have a metal guard around the rim. The laundry tray will be complete with stand, combination mixing faucets  with  tray-mounting  brackets,  1  1/2-inch tailpiece, and 1 1/2-inch wall-type P-trap. A copper tubing valve will be provided in each supply line. (c) The WATER CLOSET will be of white, vitreous china, close-coupled tank and bowl, complete with white seat and seat cover, and have a chromium, 3/8-inch, screwed, brass floor supply line with a chromium I.P valve. (d) The LAVATORY will be cast iron with a white  porcelain  enamel  finish.  The  trim  will  be chromium plated and include combination mixing faucets with a 1 1/4-inch tailpiece, pop-up waste, 1 1/4- inch wall trap, and 3/8=inch, screwed, brass floor supply lines with I.P. valves. (e)   The TUB will be of the built-in type, cast iron, with a white porcelain enamel finish. The trim will be chromium plated and include a built-in wall-type faucet  complete  with  shower  attachments,  a  curtain  rod and pins, and a 1 1/2=inch trip-lever waste. Copper tubing valves will be provided on each supply inside the wall access door. 15. 1a-07. WATER HEATER must be of the electrical storage type with a capacity of not less than  52  gallons.  It  must  be  of  an  approved manufacturer with the underwriter’s label attached. It   will   be   provided   with   two   thermostatically operated heating elements: a 15-kilowatt element located  near  the  top  of  the  tank  and  l-kilowatt element located near the bottom of the tank. A 3/4- inch  bronze  drain  valve  will  be  provided  at  the extreme bottom of the tank with a 3/4-inch hose connection.  A  l/2-inch  brass,  combination temperature   and   pressure-relief   valve   with   a discharge  extending  to  the  floor  drain  will  be furnished. A copper tubing valve will be installed in 1-14