Plumbing General Terms and Standards Guide

Strategic Layout Planning: The planning of floor plans is critical to the plumbing layout for several specific reasons:
- Pipe Alignment: It allows for the verification of pipe alignment across various systems, specifically for the waterline, sanitary system, and storm drainage.
- Installation Efficiency: Strategic placement of heavy-use areas, such as the carport, kitchen, and laundry area, within a centralized service zone helps to reduce the overall length of pipes required during installation.
- Vertical Coordination: It ensures the coordination and alignment of Toilet & Baths (T&Bs) or Comfort Rooms across different floors of a building.
Definition of Plumbing System: A comprehensive plumbing system includes the following components:
- Water Supply Systems (Waterworks).
- Sanitary Systems (Sewerage).
- Specific interior systems: Cold and Hot Water Lines, Sanitary Drainage, and Storm Drainage.

Plumbing Appliances: These are specialized devices, such as a Refrigerator, that may require a water connection or drainage but are distinct from standard fixtures.
Plumbing Appurtenances: These are accessories or devices that demand no additional water supply nor add any discharge load to a fixture, yet they perform a specific function in the operation of the system. An example provided is the Shower valve.
Plumbing Fixtures: These are the primary receptacles intended to receive and discharge water, liquid, or water-carried wastes into a drainage system. Examples include:
- Shower
- Bidet Spray
- Faucet
- Note: Other related components mentioned include the Union Patente and standard units like the Water Closet, Lavatory, and Washing Machine.

National Plumbing Code of the Philippines ( $NPCP$ ): The enforcement and administration of the $NPCP$ is the responsibility of the Building Official (or Administrative Authority in certain contexts).
Local Waterworks and Utilities Administration ( $LWUA$ ): This body is headed by the Administrative Authority.
Utility Jurisdictions in Metro Manila:
- Manila Water: Operates within the East Sector.
- MWSS: Stands for the Metropolitan Manila Waterworks and Sewerage System.

Sanitary Drainage System Components: Specifically comprises the Drain, Waste, and Vent ( $DWV$ ) system.
Scope of Alteration: An alteration in a plumbing context is defined as the change, addition, and modification of the major plumbing system only.
Plumbing Roughing-in: This term refers to the stage of plumbing work where the installation of pipes (water and discharge lines) is completed before the final installation of plumbing fixtures or fit-outs.
Professional Documentation: Plumbing sheets within a set of working drawings must be signed and sealed by a Registered Master Plumber or a Sanitary Engineer.

Signage Requirements: For a Toilet designed for Persons with Disabilities ( $PWD$ ), there must be a strictly observed, clear, and visible Accessibility Logo.
Dimensional Standards: The required dimensions for a $PWD$ toilet are significantly larger than standard units, specified as $1.70\,m \times 1.80\,m$ .

Structure vs. Building:
- Structure: A broad category of assembly with structural components and utilitarian spaces, which may exist with or without human habitation.
- Building: A specific type of structure characterized by the presence of human habitation, utilitarian spaces, and both structural and architectural components.
Ceiling Height and Cooling:
- Passive Cooling: To facilitate natural passive cooling, the height between the floor and the ceiling should be $2.70\,m$ .
- Active Cooling: In spaces utilizing active cooling (e.g., air conditioning), the height between the floor and the ceiling should be $2.40\,m$ .
Natural Humidity Control: To reduce humidity naturally within a Toilet & Bath, particularly in the shower area, the installation of a window is necessary.
Alternative Terminology: A Comfort Room ( $CR$ ) is also commonly referred to as a Washroom, Toilet, or Common Toilet.

Utility Line Placement in Roads:
- Main Sewer Line: Typically located at the centreline of the road.
- Main Storm Sewer Line: Strategically located near the gutter.
Strategic Room Orientation:
- Kitchen: Should be strategically located in the East sector of the building layout.
- Carport Adjacency: It is essential for an Architect to locate the carport adjacent to the Kitchen for functional efficiency.
Specific Spaces: A Court is defined as an open, unoccupied space used for non-Gross Floor Area ( $GFA$ ) purposes. Related terms include Atrium, Courtyard, and Airwell.