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close this bookResidential and Non-Residential - Drinking water installations and drainage requirements in Nepal (MTC - SKAT, 1988, 188 p.)
close this folderPART 2 - DRAINAGE REQUIREMENTS
View the document1. SCOPE
View the document2. FIELD OF APPLICATION
View the document3. TERMS AND DEFINITIONS
View the document4. PRINCIPLES OF INSTALLATION
View the document5. PRINCIPAL REQUIREMENTS FOR PARTS OF PIPELINE
View the document6. PRINCIPAL REQUIREMENTS FOR DRAINAGE APPLIANCES
View the document7. PRINCIPLES FOR THE PLANNING AND FITTING OF DRAINAGE PIPES
View the document8. SANITARY APPARATUS (Fixture, Appliance)
View the document9. VENTILATION
View the document10. RAIN WATER
View the document11. MATERIALS
View the document12. PRINCIPLES OF CALCULATION
View the document13. DIMENSIONING
View the document14. INSPECTION AND TESTING
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8. SANITARY APPARATUS (Fixture, Appliance)

8.100

PRINCIPLE


All apparatus must be fixed securly to the building structure. They have to withstand the loads of the appliance itself as well as additional load (e.g. wall water closets and person; washbasin with children on it, etc.) Ceramic items are to be fitted on finished walls or finished floors, with screws, in order to enable easy removal and replacement when required.

8.110

Apparatus connections - All connected apparatus shall always be easy removeable and accessible for maintenance. This can be through the fixing with back-nuts (raccords), for water closets, resp. Ceramic connections with a rubber-ring seal or ropes with putty (mastic). No cement shall be used, as the whole apparatus might be damaged if it has to be removed at later stage.



Figure

8.200

WASTE COUPLING AND SIPHON


The waste outlet and siphon of a sanitary apparatus can consist of the following parts:



APPLIANCE WITH WASTE COUPLING AND SIPHON



DETAIL OF WASTE COUPLING OF APPLIANCE

8.210

Outlet of apparatus - Removeable or fixed connection on outlet for the connection of the drainage appliance with the siphon or with the connector line respectively.

8.211

Waste coupling - Removable (flanged) or fixed projection at outlet for the connection of the drainage appliance with the siphon or the connector pipeline respectively.

8.212

Stopper - for the watertight closing of the waste outlet, such as:



a) Standpipe (for kitchen sinks)



b) plug (rubber, with chain)



c) mechanical pop-up stopper (washbasin)

8.220

Overflow outlet - Device which when outlet closed, prevents an overflowing of the drainage appliance up to the maximal permitted inlet volume.

8.230

Siphon (Traps) - A siphon is a device which prevents the exit of gases from soil and/or waste water pipelines, canals and of septic tanks.

8.231

Siphon inlet - Connector piece between outlet of drainage appliance and of siphon.

8.232

Siphon exit - Connector piece from siphon to connector pipeline.

8.233

Apparatus Connector Joint- Connector between siphon exit and connector pipeline with collar, ring seal socket, H-nipple, siphon, joint socket, etc.

8.234

Cleaning of siphons - Siphons should always be of a self-cleansing pattern. They are to be situated so as to be conveniently accessible and provided with cleaning eyes, or other easy means of cleaning, e.g. removal of entire siphon.

8.235

Placement of siphons - Close to each appliance there must always be a siphon of adequate diameter and appropriate seal. A siphon which is not an integral part of an appliance should be directly attached to its outlet, and the pipe bore should be uniform throughout and have a smooth surface.


Note: In any situation (including where the appliance itself has a siphon) more than one siphon in the pipeline is not permissible.

8.236

Single siphons - In certain conditions ranges of appliances need not have a separate siphon for each apparatus, for example:


a) Single trap for range of basins



Figure


b) Range of lavatory basins or showers



RANGE OF LAVATORY BASINS OR SHOWERS