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PLUMBING: SLAB-ON-GRADE SCOPE OF WORK





Objective of this Scope of Work

► To ensure that the Plumbing systems and fixtures are installed in a manner consistent with all applicable building codes, manufacturer's instructions and warranty requirements, and acceptable construction practices.

Terms used in this document

►SITE SUPERINTENDENT: shall refer to any Company representative with authority to enforce this Scope of Work.
►SUBCONTRACTOR: shall refer to the Subcontractor's organization, its employees, or any representative of the Subcontractor assigned the authority to perform per this Scope of Work.

Acceptable Performance

► Plumbing is divided into three phases: Rough-In, Top-Out and Trim-Out. While each project does not necessarily include every phase, all three phases are included in this Scope of Work. Payment will be made per each of the phases.

Plumbing: General

► A new set of plans is required for each house. Plans are subject to changes and modifications. It is the responsibility of the Subcontractor to have the new plans before beginning work. The Subcontractor will correct any errors that occur from using an incorrect set of plans at no cost to Company.
► It is the responsibility of the Subcontractor to secure all necessary trade permits.
► All plumbing fixtures (water closet, showers, shower tub units, sinks, etc) shall conform to and be installed to code.
► All work is to be done by trained, experienced individuals.
► The Subcontractor must be licensed in the code enforcement jurisdiction in which the project is located before work may begin. A properly qualified and licensed plumber must be on site at all times when work is being done by Subcontractor.
► The system and fixtures shall be installed in accordance with all approved building, plumbing, and health codes, and function as specified. Installations should pass the initial compliance inspection at each phase.
► Fixtures, appliances, and fittings shall be as specified and comply with their manufacturers’ standards for performance and installation.
► Service connections to water main and sewer should function properly. Piping shall be designed to ensure that there is adequate pressure and flow at each fixture and that each fixture is protected from freezing.
► Notching, drilling, and cutting of framing members should be done so as not to compromise the structural integrity of the house. Under no circumstances shall any roof or floor truss be cut, notched, or otherwise damaged. Should any truss not accommodate the necessary plumbing pipes, fixtures, etc., the Site Superintendent should be notified immediately. The Site Superintendent also must be notified if any truss is accidentally damaged. Repairs cannot be made without the approval of the manufacturer’s engineer.
► Drain, waste, vent, and water pipes shall be installed in a manner that allows room for adequate insulation as required by applicable code(s) during normally anticipated cold weather, and as defined in accordance with ASHRAE design temperatures, to prevent freezing.
► Extreme caution should be exercised while using open flames in buildings.
► All systems tests shall be completed and documented.
► The plumbing system shall be a complete and functioning system tested and ready for operation.
► The house must pass all plumbing inspections. Any corrections required by the inspectors will be at the expense of the Subcontractor.
► The Subcontractor is responsible for final inspections to ensure a quality job.
► The plumbing system should operate correctly for the first two (2) years of Warranty coverage.
► The Subcontractor is required to furnish emergency service to the Buyer during the warranty period.
► The Subcontractor shall furnish to the homeowner, via a visible and easily-accessible tag on the hot water tank, a regular office hour phone number and an emergency phone number.
► The Subcontractor is responsible for cleaning up all residual materials before the job will be accepted as complete.
► All trash and building debris shall be removed to the dumpster or designated trash area.
► The house shall be broom-swept before job shall be considered complete.
► The Subcontractor must correct any deficiency found during the inspection and the job must be 100-percent complete before payment will be made.

Plumbing: Rough-In

► Each house shall have an accessible main shutoff valve near the entrance of the water service. The valve shall be of a full-way type with provision for drainage, such as a bleed orifice or installation of a separate drain valve.
► The water service shall have a valve at the curb or property line in accordance with local water authority requirements.
► All under-slab water-distribution piping shall be of a type approved by Company.
► In any house with a basement area, either finished or unfinished, the Subcontractor shall provide a box for a sewer pump if the floor is below the sewer line.
► If the plans call for a bath to be stubbed in the basement the Subcontractor shall cover those items in the slab (drains, pipe, etc.) with a bucket to protect the items. The bucket should be flagged in a manner that makes it readily visible to other Subcontractors.
► No leaks of any kind are acceptable in any soil, waste, vent, or water pipe.
► Unless otherwise noted, all water-distribution piping in the house shall be Cross-linked Polyethylene (PEX).
► The supply line to the master manifold shall be 1”.
► All discharge piping shall be polyvinyl chloride (PVC) plastic pipe.
► The water closet centerline shall be not less than 15 inches from adjacent walls, partitions, or cabinets.
► Plumbing fixtures or other receptors receiving the discharge of indirect waste pipes shall be shaped and have a capacity to prevent splashing or flooding, and shall be readily accessible for inspection and cleaning.
► The Subcontractor is responsible for the installation of gas lines and the necessary connections for the gas starter in the fireplace, hot water tank, kitchen range and clothes dryer.

Plumbing: Top-Out

► All garden tubs, shower stalls, and tub/shower combination units are to be placed inside the bathroom areas by the framing Subcontractor prior to framing the bath areas. The plumbing Subcontractor shall work with the Site Superintendent to ensure that the fixtures are onsite in time for the framing Subcontractor to set them inside the house. The plumbing Subcontractor should not need to adjust any framing members. Should adjustments be necessary the Subcontractor should notify the Site Superintendent before adjustments are made.
► It is the responsibility of the plumbing Subcontractor to determine the appropriate placement of all supply lines, drain lines and traps for the fixtures being installed.
► If a whirlpool tub is to be installed, a door or panel of sufficient size shall be installed to provide access to the pump for repair and/or replacement.
► The plumbing Subcontractor should not need to adjust any framing members. Should adjustments be necessary the Subcontractor should notify the Site Superintendent before adjustments are made.
► No leaks of any kind shall exist in any soil, waste, vent, or water pipe.
► The flow of hot water shall be to the left-hand side of the fittings.
► A copper master manifold with shut-off valves shall be installed at the water heater and copper secondary manifolds installed in each user location, with copper adapters at the fixtures.
► The supply lines to the secondary manifolds shall be home-run from the master manifold and shall be 3/4”.
►The supply lines from the secondary manifolds to the fixtures shall be 1/2”.
► All discharge piping shall be polyvinyl chloride (PVC) plastic pipe.
► The water closet centerline shall be not less than 15 inches from adjacent walls, partitions, or cabinets.
► The location of piping, fixtures, or equipment shall not interfere with window and door operations.
► The location of piping, fixtures, or equipment shall not interfere with the placement of lighting fixtures in baths.
► Plumbing fixtures or other receptors receiving the discharge of indirect waste pipes shall be shaped and have a capacity to prevent splashing or flooding and shall be readily accessible for inspection and cleaning.
► All walls surrounding a shower compartment or tub/shower combination shall be sealed to form a watertight joint with such fixtures.
► All shower compartments and tub/shower combination fixtures shall be lined per code.
► All cleanouts shall be centered at 6” off floor, in an accessible but inconspicuous location. Preferred location is inside cabinet.
► The Subcontractor is responsible for the installation of gas lines and the necessary connections for the gas starter in the fireplace, hot water tank, kitchen range and clothes dryer.
► All gas lines to interior and exterior locations shall have valve and cap applied at installation.

Plumbing: Trim-Out

► Use only water-conserving types of fixtures, faucets, showerheads, and other fittings.
► No valve, faucet, or fixture shall leak.
► Where fixtures come in contact with walls or floors the joint shall be watertight.
► Floor-outlet or floor-mounted fixtures shall be secured to the drainage connection and to the floor, when so designed, by screws, bolts, washers, nuts, and similar fasteners of copper, brass, or other corrosion-resistant materials.
► Plumbing fixtures shall be functionally accessible.
► The hot water tank shall be a 40-gallon tank unless an approved change order is issued to upgrade the size and/or type of the tank.
► The hot water tank shall be raised 18 inches from the floor and placed in a drip pan provided by the Subcontractor. No tank shall rest directly on a concrete floor or wooden stand.
► The surface of bathtubs and kitchen sinks shall not be chipped or scratched.
► All bathtubs shall have outlets and overflows at least 1-1/2 inch in diameter and the waste outlet shall be equipped with an approved stopper.
► Sinks shall be provided with waste outlets not less than 1-1/2 inch in diameter. A strainer shall be provided to restrict the clear opening of the waste outlet. The sink strainer and rubber stopper for the garbage disposal opening shall be placed in a drawer in the kitchen cabinets to protect them from damage. They are not to be left in the sink(s).
► All faucets and showerheads shall be correctly aligned so that each faucet/showerhead is the same distance from the wall, and shall be level and straight.
► Fixtures having concealed tubular traps shall be provided with an access panel or unobstructed utility space of at least 12 inches in dimension. Joints that are soldered, screwed, fused, or solvent-welded must form a solid connection.
► Noise from loose pipes or a water hammer is unacceptable.
► The Subcontractor is responsible for installing the disposal and setting the dishwasher and gas range.



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