How do I know if an existing Indirect HW Cylinder is heated up through the coil by gravity or a pump?
Hot water cylinder
- Thread starter joelpeyton
- Start date
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if the pipes going into the coil are 22mm then fully pumped if 28mm then gravity if installed correctly or if you have a 3 port valve or 2 x 22mm zone valves then fully pumped
If it is heated by gravity it will take eons to warm up and won't have a pump between it and the boiler.
Chances are you won't have a thermostat either.
Chances are you won't have a thermostat either.
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