Rodger, It could be a leak on his water service coming into the house. I dont know where he lives but call the local utility and they can do a simple check on the service with an aqua phone to determine if it is leaking and if it is, there is a simple procedure to determine if the leak is on his property or on the townships property. If they find the leak is on his propery PM me and I can save him a few bucks if he lives in or around Toronto.