Who makes the best quality shower valves depends on criteria, but consensus among plumbers, consumer reports, and designers is that Symmons, Moen, and Delta make the best quality for residential, with Hansgrohe and Grohe best for luxury thermostatic. For extreme durability and longest lifespan, Symmons Industries, founded in 1939 in Braintree, Massachusetts, makes the best quality with its Temptrol pressure-balancing valve invented in 1960s, which lasts 30 to 50 years in hotels, hospitals, and homes, made in USA from solid brass, rebuildable, with lifetime warranty, costing $100 to $300, rated 4.8 stars by plumbers for fewest callbacks. For best residential reliability and warranty service, Moen Posi-Temp is considered best, made by Moen founded in 1937 in Ohio, with 1222 cartridge tested to hundreds of thousands of cycles, 15 to 25 year life, free replacement parts, excellent customer service, costing $60 to $160, ranked top by PlumbingZone surveys. For best value and innovation, Delta MultiChoice Universal is best, made by Delta founded in 1954 in Indianapolis, owned by Masco, with Diamond Seal, Monitor pressure-balancing, TempAssure thermostatic, fits multiple trims, costing $50 to $150, widely available, 4.6 stars. For luxury, Hansgrohe iBox and Grohe GrohSafe thermostatic are best, German-made, $200 to $400. So best quality is Symmons for commercial durability, Moen for residential reliability, Delta for value.
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