Install PEX Plumbing in House

• 1). Install a 1" diameter PEX water pipe supply line from the water source to the location of the hot water heater. For most homes a 1" diameter pipe will be sufficient but follow manufacturer's recommendations related to the amount of slack to leave in the pipe to allow for expansion and contraction.
  
  
• 2). Install one hot and one cold PEX water pipe trunk line of 3/4" diameter near each fixture or groups of fixtures. Snake these continuously throughout the home's framing, through holes drilled in the framing, being careful not to kink it. Adjust the size of these lines accordingly if the main supply PEX pipe size was increased beyond 1".
  
  
• 3). Cut 1" diameter PEX main water pipe near the hot water heater and insert a 1"X3/4"X1" Tee and use ratcheting tool to clamp the Tee in the 1" line. Attach 3/4" PEX water pipe to the 3/4" side of the Tee, clamp it and then connect other end to the water heater inlet using a 3/4" slip/thread adapter.
  
  
• 4). Slip the 1"X/4" reducing elbow into the end of the 1" supply line and attach using a 1" clamp and the ratchet tool. Slip the end of the 3/4" cold water trunk line onto the 3/4" side of the reducing elbow and attach using a 3/4" clamp and the ratchet tool.
  
  
• 5). Attach the 3/4" slip/thread adapter to the end of the hot trunk line near the water heater, clamp it onto the trunk line and thread it into the hot water heater outlet.
  
  
• 6). Cut hot and cold trunk lines at each fixture, insert reducing tees (3/4"X/2"X/4") and use the ratcheting tool to clamp each Tee into the 3/4" line.
  
  
• 7). Attach ½" hot and cold PEX water pipes to ½" side of reducing Tees, then clamp them using the ratchet tool and clamp.
  
  
• 8). Fasten the other end of the ½" lines to adequate blocking at the fixture location and cap lines until wall covering is installed and finished.
  
  
• 9). Support all pipes at regular intervals using appropriate clamps and hangers designed for use with PEX pipe.
  
  
• 10
  
  Install escutcheons over pipes at each fixture and use the ratchet tool and clamp to secure ½" slip/thread adapter to each once the wall covering is in place and finished.
  
  
• 11
  
  Thread angle stops onto the ½" slip/thread adapters.