Dr. Ali Ibrahim Tayeh
Mechanical works must hve high control in order
to prevent any damage.
Because its problem appear after some times.
We should take in our considerations
Bath room accessories distribution
Accessories (such as grab bars, paper towel
dispenser, seat cover dispenser, toilet tissue
dispenser, soap dispenser, hand dryer, etc.) should
not be appered by doors.
Bath room accessories distribution depend on
pipes must be taken in consecration when we
design structural element for buildings as drop
water pipes must be prevented to locate near
to footings or in the middle of buildings.
Collector boxes must be located in a suitable
place enable the human move with more
friability in order to be easier maintenance
and easier insulation.
Fresh water and waste water pipes must
check it after installed it .
It is preferred to control any supplier by
To prevent leakage losses or to make high
control and easy maintenance.
It is preferred to use a good kind of switch to
prevent water leakage and brokenness.
All valves shall be installed so that they are
accessible for inspection and maintenance,
and are fully operable.
Air vents shall be located at highest points in
No joints shall be made within walls, floors
or ceiling thickness, or in inaccessible
Drain valves shall be provided at the bottom
of every riser and on the outlet side of branch
isolating valves, and at all low undeniable
The domestic hot and cold water service pipe
work shall be tested with potable water to a
pressure of 1 1/2 times the working head and
maintained for two hours without further
application of pressure, and without visible
leakage or drop in indicated pressure.
In the event of the failure of any test the
defect shall be located and repaired, and the
All pipe work shall be hydraulically tested as
soon as is practicable after installation and
before completion of shaft walls, access
panels, suspended ceilings and application of
The pipe work shall be inspected and
hydraulically tested to not less than 1 1/2
times the working pressure whichever is
greater. The test shall be maintained for 2
hours without further application of pressure
and without visible leakage or drop in
Where pipes pass through floors or walls, compatible
pipe sleeves shall be supplied. Unless otherwise
stated pipe sleeves shall be sized to provide 15 mm
clearance around the pipe to be installed or, where the
pipe is to be thermally insulated or otherwise covered,
15 mm clearance around the surface covering in order
that the sleeve may be packed and sealed with
mineral or glass wool sealed at both ends with water
and fire retardant mastic. Particular attention should
be given to necessary fire-stop approval materials.
Sleeves shall be of the same material as the piping
and shall be cut to the correct required length at site
with due allowance for the thickness of plaster
and/or other finishes.
Water protecting pipe sleeves through floors shall
be supplied and fixed in the following locations:
in floors provided with a waterproof
in plant rooms
in kitchen areas
This system shall be installed to collect the foul
drainage from sanitary and waste water items and
convey this effluent to the external authority
sewers. Also this system shall cover the storm
water (rain water) drainage .
Drainage water can be grouped to three group:
Drainage water coming to its manholes by gravity
Some times we used pumps in order to getting
water to manholes ,in this case the reason to use
Difference of level
This happen if the lowest level of pipes
is lower than the bottom level of
manholes, so we use pump to come over
this problem and getting the water out.
Some times huge quantities of water cause
discharge problem , so we use pump to
come over this problem and getting the
The shell and tube plates shall be of steel and the
water boxes/end covers of steel or cast iron.
Water-box end covers shall be removable. Tubes
shall be copper, aluminum brass or cupro-nickel.
Supports of suitable materials shall be installed to
prevent tube vibration
Refrigerant and water spaces shall be pressure
tested at the manufacturers works in accordance
with this specification.
To check roof isolation we must close all
sewage or rain water pipe opening then pump
a big water quantities to special datum and
observe the change of water level with
respect to datum level
Piping requiring to be thermally insulated or
otherwise covered shall be so fixed as to
permit the application of the covering around
the full circumference and also leave
adequate space between covered pipes.
There are General spas faction should be taken in our
consideration in order to get more safe elevators as:
Stops and saftey.
Hoist way Size.