Bloemfontein gets real winter frost - temperatures below 0°C are common in June and July. Exposed pipes freeze, and frozen pipes burst. Here is what to protect.
Which pipes freeze in Bloemfontein
Exposed pipes on exterior walls, pipes in uninsulated roof spaces and garden irrigation pipes are the most vulnerable. Thin-walled copper pipes on south-facing external walls are particularly at risk. The geyser's overflow and pressure control valve piping, often run on the outside of the house, can also freeze and crack.
How to insulate before winter
Pipe lagging (foam tube insulation) slipped over exposed pipes dramatically reduces freeze risk. It is available from most hardware stores and takes minutes to apply. Secure it with UV-resistant tape on exposed outdoor runs. Pay particular attention to the section of pipe running from the geyser to the exterior overflow.
If a pipe has frozen
Do not apply direct flame to thaw a frozen pipe - this can cause a steam explosion or crack the pipe. Warm water poured over lagging, or a hairdryer on a low setting, is safer. Open the downstream tap slightly to allow the ice to expand as it melts. If the pipe has already cracked and is leaking when thawed, close the main supply valve and call a plumber.
Garden and irrigation pipes
Drain irrigation systems before winter if possible. Ball valves left full of water in frost conditions often crack at the valve body. A cracked ball valve is inexpensive to replace but an inconvenience if discovered when you first use the irrigation system in spring.
Frequently Asked Questions
How cold does Bloemfontein get in winter?
Bloemfontein regularly records overnight lows below 0°C in June and July, with some winters dipping to -5°C or lower. Frost on roofs and in gardens is common for several months.
Does my geyser need protection in winter?
The geyser tank itself is fine - it's insulated and the water inside stays warm. The exposed overflow piping on the exterior wall is the vulnerable point.