When plumbing is installed in new construction, the first step is to rough it in. To complete this step, the plumbing lines connecting the structure with the area’s supply and waste systems must be carefully planned and expertly installed.
When planning construction, plumbing rough-in is essential to the building’s beginning portion. By giving the plumbers the time they need to install pipes properly, future plumbing problems will be minimized. This guide is all about plumbing rough in with the proper description.
What is Plumbing Rough-In?
All water supply and drain pipes are installed in studs and framing members and are connected during plumbing rough-in.
The project has not yet been finished, so no fixtures or end elements have been installed, such as sinks, faucets, drains, etc. As long as there is enough storage space in the home, having these items nearby is acceptable and even desirable.
The plumbing rough-in happens before the concrete is poured if the house has a concrete slab foundation. As a result of their size and less flexibility, waste and drainage pipes take precedence. Installing the water supply lines is the next step.
Typically, roughed-in bathrooms and kitchens have PEX or copper water supply pipes sticking up through the floor or walls. Debris is often prevented from entering drain lines by covering them. Before a rough-in plumbing installation can be deemed complete, it must be pressure-tested.
Easy ways for Rough in Plumbing
You can rough in your plumbing quickly and easily by following these four steps.
· Make note of important locations
Put a mark on the wall 13 1/2 inches from where all the toilets will be, and measure outward from that point. At that point, there should be a mark for the toilet flange on the floor. Draw a line around the outside of the ring following the center of the solid flange.
· Cut a hole in the drain.
Place the flange with the two elongated slots on either side of the hole after cutting out the marked section. The flange should be screwed to the floor and shimmered as necessary.
· Installing drain pipes
Under the floor must be installed both the drain-pipe trap and vent assembly. It is essential to remember that during roughing-in, only subfloors are installed so that drains can be placed under the floor without any problems.
Drain the water towards the main waste-water pipe, known as the “waste stack,” using a 90-degree fitting and a Y-shaped fitting that measures three inches by three inches by two inches. It would help if you positioned the Y fitting to connect to the main vent pipe through the 2-inch opening.
· Installation of supply lines
By running the supply line through the floor or wall, make sure the supply line is closest to the side of the toilet tank water supply fixture. An upward extension of the water line is achieved by installing a T-fitting on the supply line. An 8-inch supply line can be attached to the “T” part supplying the toilet, along with a screw-on cap fitting to create an air space that prevents a “water hammer.”
The building inspector should be notified once you have roughed in your plumbing. Once you have completed all the steps correctly, you should be able to move on to the final steps to complete your plumbing installation.
How Long Does It Take to Rough-In a Plumbing System?
It can take several days to complete a plumbing rough-in. While this process usually takes three to five days for typical home construction, several factors can cause this process to take longer.
In large construction projects, like those for multi-family apartments, roughing in plumbing will take more time. Similar to multi-family homes, bigger single-family houses have multiple bathrooms.
It is also important to consider the weather. Wind and rain can delay any construction project, including plumbing rough-ins.
It is faster to rough in when there are enough people to complete the work promptly. Roughing it can be completed more quickly if there are enough people available. In addition to schedule conflicts, delays can also result from problems with inspectors or other construction contracts. Typically, electricians install electrical supply lines while plumbers rough in the pipes. When the electricians are delayed, the foundation pouring or the inspection of the initial phase could also be delayed.
Some additional tips for rough in plumbing
Plumbing is needed in the kitchen, the laundry room, the bathrooms, the wet room, and the outdoor kitchen. You might even need it in the shed, garage, or garden. Plumbing must be completed on schedule and to a high standard to pass inspection and to proceed with the build on time.
Depending on whether a timber or steel frame is used, rough plumbing is installed differently. Timber framed homes and extensions require holes to be cut in the studs of the timber frames so the pipes can run through them. A timber frame can lose its integrity if too many holes, too big holes, or holes in the wrong places are drilled into it; this frame will need re-enforcement.
When inspectors inspect a building, this is one of the issues they look for. Alternatively, steel frames are pre-drilled with holes for rough-in plumbing, so you won’t have to drill any holes yourself.
It is also possible for pipes to leak because they aren’t secured well enough to the building’s frame, resulting in what plumbers call water hammer. Water and air are moving through pipes that haven’t been adequately attached, resulting in a loud hammering sound.
Aside from being annoying and frustrating, unsecured pipes can lead to broken lines in the walls, which should be avoided at all costs. A building inspector will check for this problem during the rough-in plumbing inspection.
Plumbing rough-in takes a few days to complete, which is typically scheduled to be completed just before the building inspector arrives. It takes everyone a long time to prepare the inspection before they can move forward, and it takes the inspector a long time to schedule you.
FAQs (Frequently Asked Questions)
Is it possible for a shower and toilet to share an identical drain?
Generally, showers and toilets can use the same drain, but they shouldn’t share waste trap arms. Other factors to consider include whether your gutters lead to the main sewer line or septic tanks are used in your area.
After plumbing rough in, what happens?
Plumbing installations are not completed all at once but in three steps: Underground rough-in, surface rough-in, and top-side rough-in. Phases of aboveground rough-in (top-out or stack-out) and finishing (trim-out or trim-finish)
Is there a minimum number of vents you need for plumbing?
There must be a main vent stack for every building that connects separately to a septic or plumbing tank. To reach open air, the stack must run through open air or be ventilated in the most direct route.