CON'T FROM COMMENTS EARLIER.  However,  the  installation took less than 3/4/ hour and was a basic regulator with no other function.  Looking up the price afterwards, invoice did not list type or price, it appears that it would have cost me around $60 for the regulator and another $15 or so for the additional supplies necessary to install it and it was really a rather simple job with easy access.    Given that, it seems that $300 for less that  an hours worth of on site work,  company says it does not include commute time in its prices, is a little high.  While flat rate quotes are nice, they must take into consideration situations where the work load differs depending on the circumstances.  Therefore, unless you are at the upper end of the harder work needed than the average job. it can be argued that my estimated price of $300 for labor was more than a little high.  Maybe I am wrong since I have not used their services for years and  am not knowledgeable of the costs of equipment and professional labor today.  
Had a main line back up on a cold rainy day. I checked google for a reliable plumber and called the first one that came up which was Atomic. Called and talked to DeAnne and she was very helpful. She had Ryan call me and I told him what was going on, he told me he would be here in 15 minutes. 12 minutes later Ryan pulled in and I showed him the problem, he told me the price and I told him to go for it. Ryan had this power snake the likes of which I have never seen before, it not only powered through the clog with no problem he was able to tell me how far down the pipe the clog was to within a couple of feet by the number of sections he used to reach it. To be on the safe side He ran the snake a few feet past the clog which put it just past the city clean out.Both DeAnne and Ryan were courteous and professional and got my problem resolved quickly and at a reasonable cost.I will be recommending Atomic to everyone I know. Hopefully Ryan will be able to take care of others with his wonder snake.
Those who attempted to bring plumbing indoors faced technical as well as attitudinal challenges. Decisions on how wastewater was removed required as much concern as those made to ensure an adequate water supply. But equally vexing was the prevailing miasma theory of disease, which held that illnesses stemmed from "bad air" that was readily identifiable by its offensive odor. This led to a distrust of early indoor plumbing that tended to leak and a deadly fear of the sewer gas that accompanied the leaks. It is no wonder then that many individuals maintained a strong belief that elimination was best taken care of out of doors.

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