Are Symmons shower valves of good quality?

Yes, Symmons shower valves are of very good quality and are considered among the highest quality and most durable shower valves in the world, especially for commercial and long-term residential use. Symmons Industries, founded in 1939 in Braintree, Massachusetts, invented the pressure-balancing shower valve in 1960s, the Temptrol, which prevents scalding and is known for lasting 30 to 50 years in hotels, hospitals, schools, and homes, far longer than typical 15 to 25 years for Delta and Moen. Symmons valves are made in USA from solid brass with high-quality components, machined and assembled in Braintree, Massachusetts, with strict quality control. They use Temptrol pressure-balancing mechanism with spindle and piston that is rebuildable, not disposable, so you can replace internal parts rather than entire valve, saving money long-term. Consumer reviews average 4.5 to 4.8 stars on Ferguson and Amazon, with praise for solid construction, reliable temperature control, excellent scald protection, and few leaks. Plumbers rank Symmons among top for fewest callbacks and longest life, with many plumbers saying Symmons is the most reliable valve they install. Symmons offers limited lifetime warranty and excellent customer service with free parts. Downsides are higher cost of $100 to $300 and less stylish trim than luxury brands. So yes, Symmons shower valves are excellent quality, commercial-grade, extremely durable, and worth it for forever home.