The plumbing stub-outs would be the end result of this rough-in stage of pipes a residential or commercial construction. They are normally installed while the walls are still uncovered; and after the drywall painting and work is complete, a contractor comes hooks and back them up to the plumbing fixtures. There are two sorts of pipes pipes in a building: the water supply pipes as well as also the waste pipes. Consequently, there are two sorts of stub-outs.
Provide Stub-Outs
In most houses, the main water line is a 3/4-inch copper pipe that extends from the main water valve to the water heater. There it branches into two lines — hot and cold — which stretch throughout the house, buried inside the walls. At every stage where a fixture thrives, a branch line of 1/2-inch pipe tees from each principal pipe and extends to the point of use. The branch line typically terminates a inch or two past the wall or floor below the fixture that it’s services. The contractor solders on a cap that gets cut off prior to connecting the fixture. The capped pipe is a supply stub-out.
Drain Stub-Outs
The principal element of a drain-waste-vent system is that the soil stack. One end of the 3- or 4-inch pipe connects to the sewer along with the other end rises through the roof after being diminished to a 2-inch diameter. Toilet waste lines, typically 3 inches in diameter, connect directly to the soil stack, and fixture drains typically connect to the bathroom waste lines. Plumbers make fixture drains with 2-inch plastic pipes — either PVC or ABS. They stub one of these drain lines from the floor or the wall below a sink and usually, but not always, cap it until it is time to connect the sink.
Installing a Provide Stub-Out
The installation of a water source stub-out begins with installing a cutting edge at a stage in the main supply pipe close to the fixture to be supplied. In an existing water line, you need to turn off the water and then drain the pipe before you cut into it. The usual procedure would be to first construct the branch line all the way to the point at which it stubs out, return and solder all the connections, then solder on a cap. Plumbers typically clamp the pipe to a fireplace straight behind the point at which it emerges from the wall.
Installing a Waste Stub-Out
A significant difference between supply pipes and waste pipes is that waste pipes should slope down from the drain that they service — at least 1/4 inch per foot. Furthermore, elbows and tees have to have sweeps to promote water circulation. Another difference is that fixture waste pipes require heat, so you may need to tie in a pipe that rises to satisfy the main vent if the soil pile is too far away. The magnitude of the pipe and its distance in the opening of this stub-out are dictated by the plumbing code. Consult with a contractor if you are not certain how to proceed.