Rough In Plumbing Vs. Finish Plumbing
New construction plumbing generally fits into two categories, rough in plumbing and finish plumbing. Rough-in plumbing is the process of installing vents, sewers, connections and waterlines. During the finish plumbing phase, plumbers will finish installations and connections to get the home ready for use.
It is important to make sure that all rough framing in your new construction home is complete prior to sending in your plumber to begin the rough in plumbing phase. You’ll also want to make sure your plumber has all product specifications, plans, cabinet layouts, etc. before beginning. It is also helpful for your plumbing contractor to walk the framed home (potentially even with the builder present) to solidify and confirm locations of each plumbing fixture, tubs, water heater, washer/dryer hookups, the main water hookup, and the pipes needed to connect the water and drain lines.
During The Rough In Plumbing Phase:
- Pipes are routed through wall cavities
- Vent stacks are run to the roof
- Drain lines and water supply lines are connected to sewer systems, septic systems, or main water supply valves.
- Pipe connections are made
- Excavation and laying of underground pipes that run from utility connections to a primary structure is completed.
- No fixtures or end elements will be installed at this phase (lack of coverings helps the inspector).
Important Considerations During This Phase:
- Gravity is essential for draining, so wastewater drain line pipes must be installed in a position that angels downwards. If not angled appropriately, water and waste will not drain efficiently. It is important to understand that angling too much can also cause issues associated with draining too quickly.
- The wastewater system must also be vented to ensure waste is removed efficiently and safely.
- After the rough in plumbing phase, once inspection passes, the remaining parts of the plumbing system (or finish plumbing) can be completed later in the construction process.
During The Finish Plumbing Phase:
- Installation and connection of plumbing fixtures is completed
- Caps on drain and water supply pipes are removed
- Under sink drain assemblies are installed
- Water supply values and water supply lines are installed
- Caulking, sealing, and testing of new connections is completed
New construction is a big project and involves the need for multiple contractors working together. When hiring your contractors, it is important to do your research and hire reputable! Kulk’s Plumbing & Heating is here to help with your new construction plumbing needs as well as any heating needs for your new home!