Koss Plumbing & Heating

Koss Plumbing & Heating is a West Yarmouth-based plumbing and heating contractor run by owner-operator David Koss, who trained at New England Technical College and apprenticed with Carl F. Riedell & Son before working independently. The company serves residential and commercial Cape Cod customers with plumbing, water heater, gas piping, and heating work, and states it has covered Sandwich through Harwich for more than 25 years. A 2025 Google review from a past customer describes the quality of a bathroom plumbing job in strong terms, saying they had never seen such a neat installation and comparing the finished work to art — but the same reviewer says they were unable to get a call back for follow-up work and had to switch to another plumber, which points to a real gap in responsiveness alongside the praised craftsmanship. Two other Google reviews, from 2022 and 2025, describe unsafe or aggressive driving by a Koss company truck rather than anything about the plumbing work itself; both reviewers say the driving behavior made them question whether they'd trust the company with work on their home, but neither describes hiring Koss or having work done. Google shows an overall 2.6-star average from 5 ratings, and the business is not BBB accredited, with BBB listing it as Not Rated for lack of information. Anyone considering Koss Plumbing & Heating for a job should ask directly about current response times before booking, since the only detailed account of the work itself was positive on quality but negative on follow-up contact.