Just moved into a new house a couple of months ago, which is on a water meter. The cover thingy is at the front extremity of my property (sunk into the grass of the garden). When I pop the lid on it, it is full of water! Through the water, I can see a little gauge and what I guess is some kind of stopcock. Should it be full of water? I'd ask United Utilities, but I'm not yet on any kind of maintenance cover plan. Thanks in advance.