Your might notice water dripping down from your roof and gutter sometimes during the day. This is normal as the solar heater was build to release some water and/or air when the pressure inside the solar heater build up due to heat.
However, if the volume of water is high or the water dripping during the night. You might have a leakage on your solar heater. This leakage can be cause by over pressure that cause the welding joint, pipe, and so on to give away and start to leak. Replacing pressure temperature valve every 3 years can help to avoid over pressure issue.
Notes: Not replacing your pressure temperature valve every 3 years can cause permanent damage to your solar heater that might lead to leak.