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.
Plumbers in Australia have licensing requirements that differ from state to state but it is generally accepted a 4-year apprenticeship with a further minimum experience of 2 years (6 years total) and a further curricular requirement as a benchmark for licensing. Licensed plumbers are also expected to maintain minimum relevant training requirements to maintain their plumbing license