Lesson 7
Sealed System Pressure
Read your boiler’s pressure gauge: why it rises when hot, what the expansion vessel and relief valve do, and the top-up trap.
Builds on
Predict
Mia’s sealed heating system holds about 100 litres of water.
When it heats from 10°C to 70°C, how much bigger does that water get?
Choose a prediction, then select Next to see the answer.