Geyser Parts | Water Heater Components & Function

Geyser parts to take note of when you are buying a new geyser for installation. Also, if you have a problem with an existing heater, having a basic understanding of heating system parts will be beneficial.

In June 2001, by laws were enforced regarding mandatory parts for inclusion in water heater installations.

South African National Standard (SANS) 10254 states that every water heating system installed after June 2001 should comply and have these parts.

All geyser installers should fit in geysers in accordance to the standard geyser installation guide.

Water heater parts not to miss out are:

Drip tray

Drain pipe

Temperature and pressure valve

Shut-off valve/tap

Pressure control valve

Overflow pipe

Vacuum breakers

Anti-corrosion anode rod

Thermostat and heating element

Electrical isolator switch


Geyser Parts for Drainage & Pressure Relief

The drain

Drainage piping is an important aspect of any plumbing, be it construction plumbing or maintenance plumbing.

The drain pipe diameter is 50mm and is made of PVC material. If the tank bursts, the water collects in the tray and the drain pipe takes the water away from the tray.

Normally, you see this outlet of this pipe just under the ceiling coming out, to enable draining away from the building. The water coming off the tray will splash to the ground pavement and drain away from wall on the surface.

Vacuum breakers

There are two vacuum breakers on a geyser. The breakers are small brass pieces at the end on an upright pipe of 300mm length.

The importance of these small brass pieces is in preventing water from siphoning out of the geyser, whenever cold water supply is cut off.

Additionally, the breakers stop vacuum formation within the tank, which might lead to the collapse of tank.

Temperature and Pressure safety valve (T&P Valve)

The TP valve is a vent pipe, or relief valve that works to ease pressure within the tank. Imagine the steam and pressure built up when your geyser is heating up. Suppose that pressure is kept within and there is no relief, what would happen? Explosion!!

Additionally, besides the pressure relief, TP valve also helps prevent overheating of your water heater in case of thermostat failure. If the thermostat fails in an on-position, there will be no stopping from heating. In such a case, the geyser will continue heating and if there is no release of temperature, the tank will eventually burst.

Therefore, the temperature and pressure valve is a one of the most important among water heater parts.


Other Water Heater Components

Shut- Off Valve

The shut off valve enables you to stop cold water from entering the tank when the need arises. This can be to allow maintenance work, or if you need to remove and replace the geyser.

Geyser Thermostat – this is the one that reads the water temperature within the geyser. Thermostats facilitates the temperature regulation within the water heater by switching on and off.

Geyser Element – the heating component of the geyser. The element is a rod that receives electrical energy and converts to heat. As the rod heats up it heats the water around it.

Electrical isolator switch

Geyser must be earthed and have a point power to isolate and shut off power whenever the need arises. Similar to the shut off valve, the need to isolate power might be to allow maintenance or removal of geyser.