Expansion Tank Pressure Too High

The psi on the in line psi after the prv and the precharge on the expansion tank should be the same.

Expansion tank pressure too high.

For most installations the factory set air pre charge in an expansion tank is correct and should be left alone. Most expansion tanks are set to a pre charge of 20 psi when they leave the factory while the majority of residential water systems have significantly higher water pressure than that. Start by removing the protective cover from the air valve on the tank. We ll tell you how this happens what you can do and how you can do your own simple diy test at home to check it.

A properly sized pressure tank ensures your household water needs are met and your pump is protected against short cycling. When the pre charge was not to factory specifications when the air pre charge pressure needs to be increased to. It can seem very odd for tank pressure to increase above it s pre charge or pump cut off pressure but believe it or not it can happen. If your well tank is more than 8 10 years old this is a question you ll want to know the answer to.

Most expansion tanks come pressurized to 12 40 psi but before you install the tank you have to match the system pressure. A pressure tank is an integral part of maintaining your well. This means that whoever installed your tank was supposed to manually increase the tank s pre charge to match the water pressure at the time of install. This tells you that the pressure in the hot water tank is too high.

Check to see if your release valve is spurting water. Join john woodard our master water specialist. The air side of the tank should be checked and adjusted before adding water to the system if the tank is already installed and the system has pressure in it the pressure should be drained at the tank to 0 psi before testing the pressure on the tank. The usual cause of un planned water tank bladder pressure increase is a small leak that lets water into the tank s air space.

But there are some circumstances in which an adjustment to the pre charge may be needed. Pressurized well tanks extend the lifespan of your well pump by preventing rapid on off cycling of the pump and maintaining water pressure throughout your home. Look at the valve and see if there is any water residue on it. Heating boiler bladder type expansion tank compression tank pressure adjustment.

Use a bicycle pump or compressor to fill the tank to match the system pressure you noted earlier. Too low of psi and the bladder will never squish to take up expansion.