Tonight I was hanging out at my girlfriend's place when there was a knock on the door. Seeing as it was pretty late (8:30) we both looked at each other wondering who it could be. He said he was from Home Water Systems and wanted to check the iron and calcium in the taps. My girlfriend being naive just let him stroll on in. Once he saw me he was being extra polite and claimed it was necessary that he checked the taps. I've seen these scams before on Spotted In and Facebook before so I told him to get the hell out as politely as I could (not really though I kinda got stern with him asking if he's suppose to be here). He left pretty quick and said hed check in tomorrow but I know it's a scam. Does anyone else have information about this guy or guys? Was wearing a blue shirt, dirty shoes and an amateur name tag from Home Water Systems. Has anyone experienced this or heard of it before, let me know please. Thanks.