Hot water running out too fast
Showers going cold halfway through? The common reasons a hot water system runs out early, the checks you can safely make, and when it is time for a plumber.
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Key takeaways
- Hot water that runs out early is usually one of three things: a household that has outgrown the system, a part that has failed, or hot water being lost through a leak or a relief valve.
- Safe checks: note when it runs out and at which taps, check your power bill for an off-peak tariff, and look around the tank and the relief valve drain for water.
- Don't adjust the thermostat or the tempering valve to stretch the hot water. Water must be stored at 60°C and delivered to bathrooms at no more than 50°C, and adjusting either is a job for a licensed plumber.
- If the system is too small, a bigger tank, a different system type or lower-flow shower heads can fix it. A plumber sizes it to the household, not to the old unit.
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