I decided to contact BlueMax after reading their positive reviews here. Rafal was always quick to respond and to come over to view the job.
I initially contacted him to install a shutoff valve to a gasline, but Rafal was very thorough and while in the basement, he noticed a few issues and notified us.
We ended up doing not only this initial small job, but replacing our rental water heater for a tankless one (much nicer! It takes a lot less space and saves energy) and doing a few other jobs with him.
Now he is our go-to guy, and I would highly recommend him! He runs his business in a very professional manner, he is very reliable, quick to respond and very knowledgeable.