Low Water Pressure After Installing New Heater
Installation of a heater can bring with it problems with pressure. If the pressure drops lower than you expected then you might have to carry out a battery of tests in order to isolate the problem. Replacing the heater is an option but it is not always the solution. More less than often the problem is within the pipes and not the heater itself. The issue could also be a problem for all houses and not yours only. Can a water heater cause low pressure really? In truth yes, if it is faulty.
Test the pipes
Try to isolate any blockages first before you go replacing the heater. As aforementioned, the problem often as a result of debris that sets up shop within the pipes. This will block the pipes and this will limit the flow of water. If there is any debris within the pipes localized around some region you can use a pressure gauge to find out exactly where the blockage is. All you have to do is screw the pressure-gauge into the water heater and drain the valve, open it then check the pressure.
If the gauge indicates a significant change in the pressure then the problem might be a blockage in the cold water inlet that brings water for heating. The gauge might not show any change. In this case, you should turn on some other faucets and there is still no change then the problem is in the heater’s outlet. This outlet blockage is probably caused by sediments from the heater you were using previously.
At other times the problem may be external. Make a point of checking with your nearest neighbors to find out whether they are experiencing the same low pressure issue. The water supply may be the issue and not your heater. Replacing the heater will therefore be pointless.