Plumbing System for Drainage

PLUMBING SYSTEM FOR DRAINAGE

1. Single Stack System:

2. One Pipe System.

3. Partially Ventilated Single Stack System.

4. Two Pipe System.

1. Single Stack System:

 ❖ System in which the waste matter from bathrooms, sinks etc. as well as foul matter from the water closets are discharged in one single pipe called the Soil and Waste Pipe(SWP)

❖ No separate vent pipe is provided.

❖ Effective only if the traps are filled with water seal of depth not less than 75 mm.

2. One Pipe System: (Costlier than Single Stack System)

❖ One common Soil and Waste Pipe (SWP) connects different floors and carries mo both human excreta and sullage.

❖ A separate vent pipe is also provided.

❖ Traps of all water closets, basins etc. are completely ventilated. aciq pigme

❖ Cowl is provided at the top of SWP for ventilation.

3. Single Stack System Partially Ventilated:

❖ This is the modified form of the single stack system and one pipe system.

❖ The waste water from W.C, basins, sinks is discharged into one common soil and waste pipe (S.W.P).

❖ A relief vent pipe is also provided which provides ventilation to the traps of water closets.

❖ The traps of basins are not directly connected to vent pipe.

(4) Two Pipe-System:

❖ This is the improved but costly system, which requires large number of pipes.

❖ Separate Soil Pipe (SP) and Waste Pipe (WP) are provided which carry human excreta and sullage respectively.

❖ Water closet is connected to Soil Pipe(S.P)

❖ Bathrooms, sinks, lavotary basins are connected to waste pipes (WP) which are connected to drains.

❖ All the traps are ventilated by separate ventilation pipes.

❖ One ventilation pipe provided alongwith soil pipe and another ventilation pipe for the waste pipe. A total of 4 pipes - one soil pipe, one waste pipe aswinie and two ventilation pipes are provided.

Choice or Selection of Plumbing Systems

To Two Pipe Systems

❖ Efficient for multi-storeyed buildings

❖ Requires minimum use of traps.

❖ But, large number of pipes makes the system costly.

❖ Difficulty in accommodating pipes in buildings.

One Pipe System:

❖ Economical.

❖ Easy to accommodate.

❖ But require ventilation, water seals and proper connections.

❖ In multistoreyed buildings, it requires lavotary blocks to be placed one above the other.