Rough-in Plumbing Assemblies Includes rough-ins for commercial, industrial and residential buildings. This section shows costs for typical rough-ins of drain, waste and vent (DWV) and water supply piping using either plastic or metal pipe and fittings. Plastic ABS or PVC DWV pipe can be combined with plastic “poly b” supply pipe for a complete residential rough-in assembly. Cast iron or copper drainage DWV pipe can be combined with copper supply pipe for a complete commercial rough-in assembly. (Check local plumbing and building codes to determine acceptable materials for above and below grade installations in your area.) Detailed estimates of the piping requirements for each type plumbing fixture rough-in were made using the Uniform Plumbing Code as a guideline. For scheduling purposes, estimate that a plumber and an apprentice can install rough-in piping for 3 to 4 plumbing fixtures in an 8-hour day. The same plumber and apprentice will install, connect and test 3 to 4 fixtures a day. When roughing-in less than 4 fixtures in a building, increase the rough-in cost 25% for each fixture less than 4. Add the cost of the fixture and final connection assembly (as shown in Fixtures and Final Connection Assemblies) to the rough-in assembly cost. Rule of Thumb: Use plastic drainage and supply pipe in economy residential applications. Use plastic drainage and copper supply in quality residential applications. Use cast iron or copper DWV drainage and copper supply pipe in quality commercial applications. In some jurisdictions, plastic drainage pipe is allowed below grade for commercial applications only. In residential applications, plastic drainage pipe may be allowed in above and below grade applications. The difference is the liability of the owner to the patrons of a public building vs. the liability of the owner of a private residence in case of fire. ABS pipe releases toxic gases when it burns.
Water closet rough-in
Craft@Hrs Unit Material Labor Total
Floor mounted, tank type, rough-in includes 7' of 3", 8' of 1-1/2" DWV pipe and 8' of 1/2" supply pipe with typical fittings, hangers, and strapping
  Plastic DWV and PEX supply rough-in P6@1.90 Ea 24.10 97.60 121.70
  Plastic DWV and copper supply rough-in P6@2.00 Ea 28.30 103.00 131.30
  Cast iron and copper supply rough-in P6@2.25 Ea 105.00 116.00 221.00
  Copper DWV and copper supply rough-in P6@2.25 Ea 147.00 116.00 263.00
Floor mounted flush valve type, rough-in includes 7' of 3", 8' of 1-1/2" DWV pipe and 8' of 1" supply pipe with typical fittings, hangers, and strapping
  Plastic DWV and PVC schedule 40 supply rough-in P6@1.90 Ea 24.50 97.60 122.10
  Plastic DWV and copper supply rough-in P6@2.00 Ea 43.70 103.00 146.70
  Cast iron and copper supply rough-in P6@2.25 Ea 121.00 116.00 237.00
  Copper DWV and copper supply rough-in P6@2.25 Ea 147.00 116.00 263.00
Wall hung, tank type, rough-in includes 5' of 4", 8' of 1-1/2" DWV pipe and 8' of 1/2" supply pipe with typical fittings, hangers, and strapping
  Plastic DWV and PEX supply rough-in P6@1.80 Ea 24.90 92.40 117.30
  Plastic DWV and copper supply rough-in P6@1.90 Ea 29.10 97.60 126.70
  Cast iron and copper supply rough-in P6@2.35 Ea 102.00 121.00 223.00
  Copper DWV and copper supply rough-in P6@2.35 Ea 163.00 121.00 284.00
  Add for fixture carrier P6@.750 Ea 300.00 38.50 338.50
Wall hung flush valve type, rough-in includes 5' of 4", 6' of 1-1/2" DWV pipe and 8' of 1" supply pipe with typical fittings, hangers, and strapping
  Plastic DWV and PVC schedule 40 supply rough-in P6@1.70 Ea 23.80 87.30 111.10
  Plastic DWV and copper supply rough-in P6@1.00 Ea 42.90 51.40 94.30
  Cast iron and copper supply rough-in P6@1.95 Ea 105.00 100.00 205.00
  Copper DWV and copper supply rough-in P6@1.95 Ea 152.00 100.00 252.00
  Add for fixture carrier P6@.750 Ea 270.00 38.50 308.50
Urinal rough-in
Wall-hung urinal, rough-in includes 15' of DWV pipe and 8' of supply pipe with typical fittings, hangers and strapping
  Plastic DWV and supply rough-in P6@2.00 Ea 13.80 103.00 116.80
  Plastic DWV and copper supply rough-in P6@2.10 Ea 24.30 108.00 132.30
  Copper DWV and copper supply rough-in P6@2.35 Ea 99.30 121.00 220.30
  Add for fixture carrier P6@.850 Ea 210.00 43.60 253.60

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