The installation of the plumbing system usually begins after the framing. This initial work is called "rough ing-in." It includes putting in the plumbing vents and drains and all the hot and cold water piping which will be enclosed in the walls and ceilings and under the basement floor. Piping in outside walls should be insulated. Since the bathtub must be put in before the wall finish can be applied, bathtub installation is usually included in roughing-in. Plumbing fixtures and accessories are not connected until the installation of the interior finish has been completed. The design and installation of the entire plumbing system is usually regulated by provincial or municipal codes. (See Figures 103,104 and 105 for details of a typical plumbing system installation.)
When 3 in. (75 mm) copper or plastic piping is used, the stack wall may be made of 2 x 4 in. (38 x 89 mm) material. Sealing the area around the pipe is necessary to prevent air leakage into the attic space (Fig. 106).
Kitchen and bathroom in proximity for minimum pipe length.
kitchen sink and laundry tub drainage connected to this combined soil and vent stack bathtub toilet soil stack cleanout washbasin or vanity use 6" (140 mm) stud wall when soil stack continues to upper floors cleanout
-i 4, floor drain in front of laundry tubs in basement waste disposal piping system buried under concrete slab and directed outside the building to the sanitary sewer
-exterior face of building
washbasin mounted on brackets to blocking or stud wall washbasin exposed drainage piping usually chrome plated or brass drainage piping from washbasin connected to soil stack holes drilled in bottom plate and subflooring to receive hot and cold water piping outlet
subflooring cut to receive overflow piping end profile of bathtub overflow outlet subflooring cut to receive overflow piping drainage piping from trap connected to soil stack
Where soil stacks or large pipes must run horizontally at right angles to the joists, it will be necessary to frame out the joists. To do this, head ers are installed between the joists (Fig. 107). Alternatively, services are suspended and enclosed in a bulkhead.
drainage piping from washbasin bottom plate and subflooring cut to receive soil stack drainage piping from bathtub soil stack drainage piping from washbasin bottom plate and subflooring cut to receive soil stack drainage piping from bathtub soil stack
toilet toilet flange secured to subfloor toilet toilet flange secured to subfloor
Venting for plumbing.
vent pipes extend through to the open air above the roof rubber boot use 6" (140 mm) stud partitions when soil stack continues to a higher floor washbasin
In partitions, holes may be drilled in studs providing the remaining portion totals at least 1 '12" (40 mm) otherwise studding must be suitably reinforced.
toilet In loadbearing walls, the remaining portion must be bathtub at least 2/3 the depth of the studs;
otherwise studding must be soil stack and suitably reinforced, vent pipe cleanout at basement level
Framing for soil-stack pipes.
drainage piping from toilet drainage piping from bathtub drainage piping from wash basin floor Joists soil stack header joist floor flange m drainage piping from toilet drainage piping from bathtub
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