We have a WX250 pressure tank and was recently told (by a plumber) it may need to be replaced due to the fact that it runs often. We have the home winterized and blow the lines - when he came to opent he house up, he noticed we may have a problem) When speaking to a neighbor - he said there should be no need to repalce it that it may be a valve. How do we figure out what is going on? Can you help?