[KEVIN & JOSIE]

On the cold water side you will see a large object that looks like a can. It is an expansion tank. It has a diaphram inside. If the diaphram leaks water past and the can fills with water, it fails, (no room for expansion) your relief valve will seep and leak. The expansion tank should have half air, and half water. If you take your finger and tap on the side of the tank, half should sound hollow (air), half solid (water). If the whole thing sounds solid, full of water, you will need to replace it. You will see a schraider valve to add air to the new one. You can use a hand pump. The recommended pressure is on the tank. They are not very expensive. Hope this takes care of your problem.