I called Black Diamond to have someone come out to figure out what this knocking sound was after the toilet flushed & the faucets were turned off. It had been happening for awhile and it seemed like it was getting worse. I did some research on-line and I was afraid it was something called ""water hammer"" which can cause damage to your pipes.\r
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Herb was very thorough in investigating what the problem might be. He first wanted to see if it was air in the line. He turned off the water to the house. He then opened the outdoor garden hose faucet and some faucets in the house until all the water had drained out. The faucets were then all closed and the water was turned back on. Then, we opened up the faucets again to let the air out of the lines. I think we made a good team. I have a three story house and we both were running up and down the stairs several times that day.\r
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Unfortunately, that did not solve the problem. We both took turns listening in the basement to try to figure out where this knocking sound was originating from. He would run upstairs to flush the toilet and I would listen for the knocking sound. Then, I would run upstairs and flush the toilet and have him listen in the basement for the knocking sound. We both had different opinions from where the knocking was coming from. Herb kept concentrating on the water heater because I told him that I had first noticed the problem when we got a new water heater. To me, it didn't sound like it was coming from the water heater. Anyway, almost 3 hours later, Herb solved the problem. His diagnosis was correct. The knocking was coming from a broken check valve in the dielectric union of the water heater. He removed the check valve and no more knocking!\r
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Just wanted to let you know what a fine employee Herb is. He was very thorough, considerate and very, very patient with me. I think we worked very well together and he had a very positive, upbeat attitude. I was so excited that he solved the problem that I gave him a high five...I almost cried. I was so worried that some serious damage had been done to the pipes! Thank you, Herb, for doing such a great job. Keep up the good work! If you ever need any plumbing work done by someone you can trust call Black Diamond!!!!\r
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