3. OH&S
HANDLING ELEVATED WORK
MATERIALS PLATFORMS
Follow procedures and Operators should be
adhere to OH&S familiar with
requirements. equipment.
Lifting equipment Appropriate PPE should
should be used when be worn at all times
required when working in a
basket of a EWP
Jun 18, 2012 3
4. Discharge Vs. Drainage
Discharge pipes convey the waste water
from fixtures to the drainage system.
Jun 18, 2012 4
7. FACTORS IN SELECTION OF
MATERIALS
Type of usage
Class of discharge
Properties of liquids conveyed
Soil type and condition
Environmental factors
Temperature
Characteristics of materials and products
Jun 18, 2012 7
8. Type of usage
Various products
Various locations (under ground/floors)
Jun 18, 2012 8
9. Properties of liquids
Household waste (kitchen/bathroom/toilet)
Industrial waste (grease/fat/oil/acid. Trade
waste)
Jun 18, 2012 9
10. Soil type and condition
Acidic soils
High levels of Alkaline
High levels of salt
Jun 18, 2012 10
11. Environmental factors
Exposed to sunlight
Installed in an area where they can be
easily damaged.
Exposure to chemicals
Jun 18, 2012 11
12. Temperature
Hot waste (dishwashers or glass washers)
Additional support and allowance for
expansion and contraction
Jun 18, 2012 12
13. CHARECTERISTICS OF
MATERIALS AND PRODUCTS
What are some of the characteristics of
the various types of pipe?
Expansion rates
Durability
Price
Resistance to chemicals
Suitability to particular types of waste
AS 3500.2 SECTION 2
Jun 18, 2012 13
14. AS 3500 2.2
Use of regulations
Discuss dot points as listed on page 11 of your unit
notes.
You need to be able to understand where we find
information in the Australian Standards
Jun 18, 2012 14
15. Where do we find a trap?
Traps are located under
basins, sinks, showers,
baths etc
The plumbing code states
“The drainage discharge
pipe from all sanitary
fixtures will be
constructed with a trap,
or a self sealing
mechanical device”
Jun 18, 2012 15
16. TRAPPING THE FIXTURE
One type of trap is installed after the
fixture is installed.
One type of trap is formed in the fixture
as part of the manufacturing, for
example. (Urinals, Pans etc) This type is
called an integral trap
Jun 18, 2012 16
18. S traps clear waste water to a vertical pipe
Jun 18, 2012 18
19. P traps deliver waste water to a horizontal
pipe
Jun 18, 2012 19
20. How do they work?
A “U” shaped bend forms a water seal to
prevent odours, bacteria's and sewer
gasses from pipe system coming back into
buildings.
Read A.S. 3500 CL. 6.4.2 Retained Water
Seal
Jun 18, 2012 20
21. How does it work?
A “U” bend in the pipe helps to maintain a
water seal that prevents the gas from the
sewer getting back through the fixture.
Jun 18, 2012 21
22. What is the water seal?
The water will discharge
once it gets to the
spill level.
The “U” shaped pipe
under that will hold a
water seal
Jun 18, 2012 22
23. THE WATER SEAL
The designed depth of the water
seal in a W.C. and other 100 mm
traps is 50mm, +/- 5mm and
75mm (-5 +35mm) for all other
fixture traps.
After a fixture has been used and
the discharge of water completed,
the trap must maintain a water
seal with a 25mm min. depth.
Jun 18, 2012 23
24. THE WATER SEAL
How much water is
required to make a
seal?
Look up in your regs!!
Jun 18, 2012 24
25. PARTS OF THE FIXTURE
TRAP
Inlet
Water seal
Crown
Crown weir
Outlet
Look up the definition of a
fixture trap in your plumbing
code
Jun 18, 2012 25
31. INSTALL DISCHARGE PIPES
1/ Should the discharge pipe, be connected to
a fixture, before or after the fixture is fixed in
place ?
Depending on the circumstances it may be
necessary to install the discharge pipe before
the fixture has even been installed. In some
instances it may be considered a better option if
the pipe is installed after the fixture has been
installed
Jun 18, 2012 31
32. INSTALL DISCHARGE PIPES
2/ List 6 factors, that may determine the
materials suitable for a given job.
Type of usage
Class of discharge
Properties of liquids conveyed
Soil type and conditions
Environment factors
Temperature
Jun 18, 2012 32
33. INSTALL DISCHARGE PIPES
3/ Copper pipe is available in different
‘types’. Which ‘type’ has the thickest
wall thickness ?
Type ‘A’
Jun 18, 2012 33
34. INSTALL DISCHARGE PIPES
4/ In reference to the discharge pipe,
what information could you gain from a
site inspection ?
Environmental factors such as:-
exposed to excessive heat from the sun or other heat source,
such as a furnace in a factory
damaged by a vehicle
at a factory where a forklift could crash into the unprotected
pipe
having exposure to corrosive chemicals such as acids
Jun 18, 2012 34
35. INSTALL DISCHARGE PIPES
5/ When installing a pipe that is to pass
through a timber beam, why is it
regarded better practice to position the
pipe through the centre, rather than
cutting out the side of the timber ?
As cutting through the side has the
potential of weakening the overall
structure.
Jun 18, 2012 35
36. INSTALL DISCHARGE PIPES
6/ Calculate the fall of a 50mm discharge
pipe which is to be run 2.8 metres, at
the minimum grade allowable by the
AS 3500.2.
70mm
Jun 18, 2012 36
37. INSTALL DISCHARGE PIPES
7/ When creating a material list to be used in
the ordering of materials, what should
you specify in the structure of your list ?
Quantity
Size
Material
Any detail (e.g. DN 100 copper or DN 80 PVC)
Jun 18, 2012 37
38. INSTALL DISCHARGE PIPES
8/ Why is it important to check materials
off, which have been delivered to you
at the work site ?
To ensure what you had ordered is in
fact what you received
Jun 18, 2012 38
39. INSTALL DISCHARGE PIPES
9/ When you are about to fit the end of a
pipe into a fitting such as a bend, why
is it important to make sure the end of
the pipe has been cut off squarely ?
To make sure the pipe is pushed all the
way into the socket
Jun 18, 2012 39
40. INSTALL DISCHARGE PIPES
10/ According to the AS 3500.2, what are
the 2 methods for testing discharge
pipes ?
The hydrostatic water test
The air test
Jun 18, 2012 40
41. INSTALL DISCHARGE PIPES
11/ With regards to an air pressure test,
what is the pressure the pipeline must
be subjected to and what is the
minimum hold time required ?
Pressure of 15 kpa
Hold time of 3 minutes minimum
Can drop a max of 2Kpa from 15kpa to
Jun 18, 2012
13Kpa within the 3 minutes test time.
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