Scribd
Upload
4K views2 pages

Sanitary Drainage System

This document provides an overview of sanitary drainage systems, including their components and design principles. It describes the different types of waste pipes, including direct waste pipes that connect directly to fixtures and indirect waste pipes that discharge into fixtures. It also discusses ventilation portions that maintain pressure balance and prevent negative trap seal pressure. Finally, it defines plumbing traps as bends in pipes under fixtures that retain water to prevent sewer gases from entering buildings.

Uploaded by

Nelscy Avancena
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
4K views2 pages

Sanitary Drainage System

This document provides an overview of sanitary drainage systems, including their components and design principles. It describes the different types of waste pipes, including direct waste pipes that connect directly to fixtures and indirect waste pipes that discharge into fixtures. It also discusses ventilation portions that maintain pressure balance and prevent negative trap seal pressure. Finally, it defines plumbing traps as bends in pipes under fixtures that retain water to prevent sewer gases from entering buildings.

Uploaded by

Nelscy Avancena
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 2

SANITARY DRAINAGE SYSTEM

SANITARY DRAINAGE SYSTEMS - SOIL, WASTE -DIRECT AND INDIRECT


WASTE PIPING SYSTEMS

A SANITARY DRAINAGE SYSTEM IS A SYSTEM OF PIPING WITHIN PUBLIC OR


PRIVATE PREMISES THAT CONVEYS SEWAGE OR OTHER LIQUID WASTE TO AN
APPROVED POINT OF DISPOSAL.

PRINCIPLES OF WASTE & SOIL PIPES ROUGHING-IN: (CHANGES IN


DIRECTION OF SANITARY DRAINAGE LINES)
 HORIZONTAL TO HORIZONTAL CHANGE IN DIRECTION - USE 45° WYE
BRANCHES, COMBINATION WYE – 1/8 BEND BRANCHES, OR OTHER
APPROVED FITTINGS OF EQUIVALENT SWEEP.
 VERTICAL TO HORIZONTAL CHANGE IN DIRECTION - 45° WYE BRANCHES
OR OTHER APPROVED FITTINGS OF EQUIVALENT SWEEP

DIRECT WASTE PIPE


- DIRECT WASTE IS ONE WITH TERMINAL DIRECTLY CONNECTED TO THE
PLUMBING SYSTEM SUCH AS SINK, LAVATORIES, AND BIDET ETC.
INDIRECT WASTE PIPE
– IS A PIPE THAT DOES NOT CONNECT DIRECTLY WITH THE DRAINAGE
SYSTEM BUT CONVEYS LIQUID WASTES BY DISCHARGING INTO A PLUMBING
FIXTURE, INTERCEPTOR OR RECEPTACLE DIRECTLY CONNECTED TO THE
DRAINAGE SYSTEM.
A. VENTILLATION
- PORTION OF THE DRAINAGE PIPE INSTALLATION INTENDED TO
MAINTAIN A BALANCED ATMOSPHERIC PRESSURE INSIDE THE SYSTEM.

 VENT PIPE- A PIPE OR OPENING USED FOR ENSURING THE


CIRCULATION OF AIR IN A PLUMBING SYSTEM AND FOR RELIEVING
THE NEGATIVE PRESSURE EXERTED ON TRAP SEALS.

MAIN TYPES:

 MAIN SOIL & WASTE VENT - THE ‘BACKBONE’ OF THE ENTIRE SANITARY
SYSTEM. CONNECTED TO THE MAIN SOIL & WASTE STACK
 MAIN VENT - THE PRINCIPAL ARTERY OF THE VENTING SYSTEM TO WHICH
VENT BRANCHES ARE CONNECTED.
 INDIVIDUAL VENT OR BACK VENT - A PIPE INSTALLED TO VENT A FIXTURE
TRAP THAT CONNECTS WITH THE VENT SYSTEM ABOVE THE FIXTURE
SERVED OR TERMINATES IN THE OPEN AIR.

B.   PLUMBING TRAPS
- IS A BEND IN THE PIPE WHERE THE WASTE GOES OUT OF THE TOILET. IT
RETAINS SOME WATER AFTER FLUSHING CAUSING A SEAL AND PREVENTING SEWER
GASES FROM ENTERING THE BUILDING. THE TRAPS ARE LOCATED BELOW OR WITHIN
A PLUMBING FIXTURE AND RETAINS SMALL AMOUNT OF WATER. THE RETAINING
WATER CREATES A WATER SEAL WHICH STOPS FOUL GASES GOING BACK TO THE
BUILDING FROM DRAIN PIPES. THEREFORE ALL PLUMBING FIXTURES SUCH AS SINKS,
WASHBASINS, BATHTUBS AND TOILETS ETC ARE EQUIPPED WITH TRAPS.

You might also like