Plumbing and Piping Systems Inspection Notes: Up to Code
Such plates shall cover the area of the pipe where the member is notched or bored, and shall extend not less than 2 inches 51 mm above sole plates and below top plates. Components of a plumbing system installed along alleyways, driveways, parking garages or other locations exposed to damage shall be recessed into the wall or otherwise protected in an approved manner.
Buried piping shall be supported throughout its entire length. Where trenches are excavated such that the bottom of the trench forms the bed for the pipe, solid and continuous load-bearing support shall be provided between joints.
Bell holes, hub holes and coupling holes shall be provided at points where the pipe is joined. Such pipe shall not be supported on blocks to grade. In instances where the materials manufacturer's installation instructions are more restrictive than those prescribed by the code, the material shall be installed in accordance with the more restrictive requirement. Where trenches are excavated below the installation level of the pipe such that the bottom of the trench does not form the bed for the pipe, the trench shall be backfilled to the installation level of the bottom of the pipe with sand or fine gravel placed in layers not greater than 6 inches mm in depth and such backfill shall be compacted after each placement.
Where rock is encountered in trenching, the rock shall be removed to not less than 3 inches 76 mm below the installation level of the bottom of the pipe, and the trench shall be backfilled to the installation level of the bottom of the pipe with sand tamped in place so as to provide uniform load-bearing support for the pipe between joints. The pipe, including the joints, shall not rest on rock at any point. If soft materials of poor load-bearing quality are found at the bottom of the trench, stabilization shall be achieved by overexcavating not less than two pipe diameters and backfilling to the installation level of the bottom of the pipe with fine gravel, crushed stone or a concrete foundation.
The concrete foundation shall be bedded with sand tamped into place so as to provide uniform load-bearing support for the pipe between joints.
Backfill shall be free from discarded construction material and debris. Loose earth free from rocks, broken concrete and frozen chunks shall be placed in the trench in 6-inch mm layers and tamped in place until the crown of the pipe is covered by 12 inches mm of tamped earth. The backfill under and beside the pipe shall be compacted for pipe support. Backfill shall be brought up evenly on both sides of the pipe so that the pipe remains aligned.
In instances where the manufacturer's instructions for materials are more restrictive than those prescribed by the code, the material shall be installed in accordance with the more restrictive requirement.
How to perform a pipe stress analysis
Where pipe is to be installed by tunneling, jacking or a combination of both, the pipe shall be protected from damage during installation and from subsequent uneven loading. Where earth tunnels are used, adequate supporting structures shall be provided to prevent future settling or caving. In the process of installing or repairing any part of a plumbing and drainage installation, the finished floors, walls, ceilings, tile work or any other part of the building or premises that must be changed or replaced shall be left in a safe structural condition in accordance with the requirements of the building code.
A framing member shall not be cut, notched or bored in excess of limitations specified in the building code. Truss members and components shall not be cut, drilled, notched, spliced or otherwise altered in any way without written concurrence and approval of a registered design professional.
Plumbing and Piping Systems Inspection Notes: Up to Code has been added
Alterations resulting in the addition of loads to any member e. Trenching installed parallel to footings and walls shall not extend into the bearing plane of a footing or wall. The upper boundary of the bearing plane is a line that extends downward, at an angle of 45 degrees 0.
Piping materials exposed within plenums shall comply with the provisions of the mechanical code. Enforcement of the provisions of this section is the responsibility of the certified building official of the certified municipal, county, or township building department having jurisdiction or the superintendent of the division of industrial compliance. Where earthquake loads are applicable in accordance with the building code , plumbing piping supports shall be designed and installed for the seismic forces in accordance with the building code.
Hangers, anchors and supports shall support the piping and the contents of the piping. Hangers and strapping material shall be of approved material that will not promote galvanic action. Hangers and anchors shall be attached to the building construction in an approved manner. Pipe shall be supported in accordance with Table The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feet where foot lengths of pipe are installed. For sizes 2 inches and smaller, a guide shall be installed midway between required vertical supports.
Such guides shall prevent pipe movement in a direction perpendicular to the axis of the pipe. Rigid support sway bracing shall be provided at changes in direction greater than 45 degrees 0. Anchorage shall be provided to restrain drainage piping from axial movement. For pipe sizes greater than 4 inches mm , restraints shall be provided for drain pipes at all changes in direction and at all changes in diameter greater than two pipe sizes.
Braces, blocks, rodding and other suitable methods as specified by the coupling manufacturer shall be utilized. Expansion joint fittings shall be used only where necessary to provide for expansion and contraction of the pipes. Expansion joint fittings shall be of the typical material suitable for use with the type of piping in which such fittings are installed. Piping bundles for manifold systems shall be supported in accordance with Table Support at changes in direction shall be in accordance with the manufacturer's instructions.
Where hot water piping is bundled, each hot water pipe shall be insulated. All buildings and structures which have been determined to require flood resistant construction by the local flood plain administrator, as a participant in the "National Flood Insurance Program", shall be constructed as required by the provisions of section of the building code for approval under the "Regulations for Floodplain Management and Flood Hazard Identification" of the "National Flood Insurance Program" pursuant to "FEMA 44 CFR Parts " and the authority's "Flood Damage Prevention Ordinance.
For structures located in flood hazard areas, the following systems and equipment shall be located and installed as required by Section of the building code. Water service pipes.
Plumbing and Piping Systems Inspection Notes: Up to Code (eBook) by Gil Taylor (Author)
Vents and vent systems. Exception: The systems listed in this section are permitted to be located below the elevation required by Section of the building code for utilities and attendant equipment, provided that the systems are designed and installed to prevent water from entering or accumulating within their components and the systems are constructed to resist hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding up to such elevation. Washrooms and toilet rooms shall be illuminated and ventilated in accordance with the building code and mechanical code.
The location of plumbing fixtures and the requirements for compartments and partitions shall be in accordance with Section Interior finish surfaces of toilet rooms shall comply with the building code. The owner or owner's representative shall cause the applicable tests and inspections prescribed in Sections In accordance with OBC Section The building official may require that the tests be conducted in the presence of the building official or certified plumbing inspector.
The owner or owner's representative shall keep records of the tests and inspections and shall submit such records to the building official upon request. New plumbing systems and parts of existing systems that have been altered, extended, or repaired shall be tested as prescribed herein to disclose leaks and defects, except that testing is not required in the following cases: 1.
In any case that does not include addition to, replacement, alteration or relocation of any water supply, drainage or vent piping. In any case where plumbing equipment is set up temporarily for exhibition purposes. Equipment, material, power and labor necessary for testing a plumbing system or part thereof shall be furnished by the owner or the owner's representative.
Required tests shall be conducted by and at the expense of the owner or the owner's representative. Gauges used for testing shall be as follows: 1. Tests requiring a pressure of 10 pounds per square inch psi 69 kPa or less shall utilize a testing gauge having increments of 0. Tests requiring a pressure of greater than 10 psi 69 kPa but less than or equal to psi kPa shall utilize a testing gauge having increments of 1 psi 6.
Tests requiring a pressure of greater than psi kPa shall utilize a testing gauge having increments of 2 psi 14 kPa or less. All plumbing system piping, fittings, and shower liners shall be tested with water. Exception: Plumbing system piping and fittings are permitted to be tested as prescribed in Sections Where this code does not address or prescribe an alternative test method, an alternative test method prescribed by the manufacturer of the piping, fittings, or solvent cement in the published manufacturer's installation instructions will be acceptable as meeting the requirements of this code.
Where any work or installation does not pass any initial test or inspection, the necessary corrections shall be made to comply with this code. Drainage and vent piping and fittings shall be tested prior to the installation of the plumbing fixtures and prior to the installation of wall and ceiling coverings to verify the integrity of the system in accordance with one of the following methods prescribed in Section A water test shall be applied to the drainage system either in its entirety or in sections.
If applied to the entire system, all openings in the piping shall be tightly closed, except the highest opening, and the system shall be filled with water to the point of overflow. If the system is tested in sections, each opening shall be tightly plugged except the highest openings of the section under test, and each section shall be filled with water, but no section shall be tested with less than a foot mm head of water. In testing successive sections, at least the upper 10 feet mm of the next preceding section shall be tested so that no joint or pipe in the building, except the uppermost 10 feet mm of the system, shall have been submitted to a test of less than a foot mm head of water.
This pressure shall be held for at least 15 minutes. The system shall then be tight at all points.
When permitted by the manufacturer of the piping, fittings, and solvent cement if part of the plumbing system , an air test shall be made by forcing air into the system until there is a uniform gauge pressure of 5 psi This pressure shall be held for a test period of at least 15 minutes. Any adjustments to the test pressure required because of changes in ambient temperature or the seating of gaskets shall be made prior to the beginning of the test period.
Testing shall be done with dual pressure relief valves rated for 7. When permitted by the manufacturer of the piping, fittings, and solvent cement if part of the plumbing system , an alternative method of testing the drainage and vent system, such as compressed gas or vacuum, may be permitted to meet the drainage and vent rough-in test requirements of this code as long as the test is conducted strictly in accordance with the requirements published in the manufacturer's installation instructions.
Plumbing and Piping Systems Inspection Notes: Up to Code
After the plumbing fixtures have been set and their traps filled with water, the entire drainage system shall be subjected to one of the following final tests as prescribed by the building official: All plumbing fixtures shall be operated and a visual inspection of accessible piping and joints shall be performed to determine that there are no visible leaks. The final test of the completed drainage and vent systems shall be made, after the fixtures are connected, as follows: 1.
Close all stack openings;. A manometer tube shall be placed through a trap seal to the system side and water shall be added to a fixture until an equivalent of at least 1 in. Water may be added to a water closet bowl or trap tailpiece extension until the water level is at least one inch higher than the original trap seal;. The system shall then be separated at a trap seal, AAV, or other means as directed by the plumbing inspector for verification that the entire system is interconnected.