The pressure gauge that is located outside of my water tank is dripping about twice a minute. It seems like this is something I could simply replace but I wanted to get some advice as this is something I have not run into before. It is definitely not being caused by high water pressure because the pressure is at about 30 psi. Here is a picture of what is going on.
Water – How to fix leak coming from pressure gauge on water tank
leakwater tank
Related Topic
- Water – the best way to clean a 300 gallon Water tank that was storing Canola Oil
- Plumbing – Why doesn’t the pressure tank fill as expected
- Water – Replacing pressure gauge on water holding tank
- Plumbing – How to fix water leak coming from pressure gauge/valve on water tank
- Water – Trying to identify cause of minor leak from water heater TPR valve
- Water – Well Pressure Tank from 35 PSI to 65 and back every 7 minutes
- Water – How to Fix this Water System
Best Answer
What you pointed at is the pressure relief valve. Seeing that the pressure is fairly low, it could either need adjustment or be failing.
The pressure relief valve is basically there to release very high pressure before a pipe/filter/faucet relieves it (eg: blows up). It's basically just a spring pushing against a piston.
You can try adjusting it first by turning the end clockwise just until the flow stops. Best to do this at the pump cut-off pressure (which is the highest pressure you'd normally see) -- basically open a tap until the pump runs, wait for the pump to shut off, and then adjust the relief valve. A lot of the valves actually have a ridged edge you can turn, though yours looks like it probably requires a nut/screw driver or pliers.
If that doesn't work, it is probably just that the valve is failing. Could be a cheap valve or have a manufacturing defect, or could be corrosion. Replacements cost a few dollars at any home improvement or plumbing store and are very easy to install (use teflon tape on the threads).