We have a vacation cabin in the Southern tier of NYS. The well was put in about 12 years ago with the presure tank (thought to be a membrane type)buried 6 ft deep next to the well head. The issue was noticed this summer with a short cycle of a couple of minutes when no water is being called for. The presure gauge started at 40 lbs and drifted down slowly to 20 which caused the pump to cycle.
We were hoping to not dig up the old presure tank this winter and a theory was hatched to add a second membrane tank in the house thinking that if the old one had ruptured it might just act like a dead end pipe.
We installed the new tank in the house and at first glance it seemed we had sucess, the presure gauge read a steady 40 lbs. Over the course of the weekend we then realized that gauge would hold at 40 for a couple of minutes than drift down to 20 and kick the pump on when no water is being called for. The short cycle is now longer at about 5 minutes.
I think we know what must be done at this point, just wondering if there is anything else we should check like the presure switch before we get out the shovels?