Plumbing Africa May 2017

3	SANS 10252-1	ISOLATING VALVES Isolating valve must be installed:
1.			On the inlet pipe of the Pressure Control Valve( separate to the integral isolating valve of a Pressure Control Valve)
2.			If applicable on the inlet side of all float valves
3.			Shall not be provided between any expansion-relief device or vacuum relief device.

4 SANS 10252-1 10254

5 SANS 10254 198

6 SANS 10254 10252-1

7 SANS 10254 10252-1 & 2

VACUUM BREAKERS
1.	Vacuum control valves shall be installed on both hot and cold water pipes to and from the heater to ensure the water heater is vented.
2.	Vacuum control valves shall be installed on both hot and cold water pipes to ensure that siphonage of the water heater is prevented.
PRESSURE CONTROL VALVE
1.	The Pressure Control Valve shall have the same pressure rating as other valves used in the system.
2.	The pressure rating of the Pressure Control Valve maybe less than the rated pressure of the storage water heater but shall never exceed it.
3.	The location of the Pressure Control Valve must be related to the required downstream flow-pressures.
See requirements of the Expansion Control Valve if the Pressure Control Valve incorporates an Expansion Control Valve.
MOUNTING
1.	The support structure for the drip tray and water heater, must be placed on tie beams that are supported on load bearing walls, at least grade 5 of
SANS 1783-2, of a size 114mm x 30mm or bigger and may not be spaced more than 500mm apart.
2.	Each foot of water heater must rest on a support beam.
3.	No water heater or storage tank of capacity exceeding 200 L shall be attached by means of brackets or hangers to a load-bearing masonry or
concrete wall or to any other vertical structural element.
DRIP TRAY
1.	Drip tray installed in the correct manner.
2.	The size of the drip tray shall be such that it will cover the total area of the heater and the associated water control appurtenance
3.	Drip tray discharge pipe must be installed and sloped and supported towards its outlet to ensure that all water will run out unrestricted.
4.	Discharge pipe must be suitable for hot water as required in SANS 10252 – 1 section 8 and drainage principles of SANS 10252-2 must be
employed( gradients, no 90 ° elbows on horizontal runs etc.
5.	Pipe must discharge to outside of building, easily visible.

8 SANS 10252-1 THERMAL INSULATION

1. Thermal insulation must be installed on the hot and cold pipe work as directed in SANS 10252-1 section 6(* 3 m from the hot water outlet, cold pipe first 1m from inlet and first 1m of the Temperature and Pressure discharge pipe) * While the standard reflects all hot water pipes, IOPSA recommended 3m, while the remaining pipework should be noted to the client( see below for written non-compliance).

2. Must be a minimum of R-1 rated. 9 PIPE WORK

1. The pipes shall be firmly anchored to prevent water hammer and the dislodgement of joints.

10 SANS 10252-1 181 1848 198 752 1056-3 776

COMPONENTS( INCL. PIPES, FITTINGS AND FIXTURES)
1.	All Materials, pipes, fittings, components and fixtures used in the replacement must meet SANS 10252 – 1 section 5( when applicable the supplier
must be able to provide proof that the component complies to the relevant SANS standard) and must be listed on the JASWIC acceptance list.
2.	Materials, pipes, fittings, components and fixtures must be installed as per regulation and manufacturers guidelines.
3.	Connections to all components must be union type for ease of replacement.
4.	Adequate access must be provided to remove or maintain or replace any component.
5.	Pipes & pipe fittings,
a.	Copper, Plastic, Stainless steel and mild steel galvanized medium
b.	All pipes must be fixed as per manufacturer and SANS 10252-1 section 5 and 8.
6.	Components
a)	Thermostats – SANS 181
b)	Safety trays – SANS 1848
c)	Fixed type water heaters – SANS 151
d)	Valves – SANS 198
e)	Float valve – SANS 752
f)	Isolating valves SANS 1056-3 ball, SANS 776 gate
7.	Connections to all components( storage tank, valves, pumps, etc.) must be union type for ease of replacement.
8.	Adequate access must be provided to remove or maintain or replace any component.
HOT WATER CYLINDER
1.	Integrity of hot water cylinder and the valves must meet SANS 151 requirements.

11	SANS 151
	198
12	SANS 10254	WRITTEN NOTICE OF NON-COMPLIANCE
1.			When any replacement, repair or maintenance work is being done on any components in the system, a written notice of all non-compliances must
be given by the plumber to the owner or occupant for the owner’ s attention. See annexure A.

13 SANS 10254 10142-1

COC( included in current amendments to SANS 10254) 1. A plumbing certificate of compliance from the Plumbing Industry Registration Board( PIRB) the SQAQ registered professional body for plumbers, shall be issued for the installation, replacement or repair of any plumbing works carried out on the hot water reticulation system. 2. An electrical COC is required for the electrical connection in accordance with SANS 10142-1( OHS Act Electrical Regulations)

* NOTE: These tables do not cover all aspects of compliance as required by regulation & standards. You are still responsible to comply with all regulations and standards. Refer to point 12 & Annex A: Non-compliance notice SANS 10254 for guideline to all areas of compliance.

Plumbing Africa May 2017 | Page 59