The average height of young boys is relatively similar to that of young girls. 2-year-old boys are on average 34 inches tall and weigh 28 pounds. At age four, they are 40 inches tall and weigh 36 pounds. By age six, boys are an average of 45 inches tall and weigh 46 pounds.8-year old boys have an average height of 50 inches and weigh 56 pounds.t age four, they are 40 inches tall and weigh 36 pounds. By age six, boys are an average of 45 inches tall and weigh 46 pounds. 8-year old boys have an average height of 50 inches and weigh 56 pounds.
Swing Pipe Installation Tips. Swing pipe is flexible tubing made from. high quality polyethylene that is used. to connect pop-up spray heads and. rotors to PVC and poly pipe lateral lines. in an irrigation system. Swing pipe can. be effectively used in areas where the. space is confined or restricted due to the.
Pex Pipe. Cross-linked polyethylene piping is commonly called pex pipe. It is the material used for water supply in domestic plumbing. The Uponor/Wirsbo sprinkler systems and the Kwench fire sprinkler systems in NFPA 13D fire sprinkler systems use this 1/2 pex pipe in interconnection with the domestic plumbing. NFPA 13 requires that fire sprinkler system piping be listed for no less than 175 psi, and be able to withstand a hydrostatic test of 200 psi for 2 hrs, and in some cases slightly more than 200 psi.