Product Description Since 1939, Symmons has set the standard for uncompromised quality in commercial and residential plumbing products. If you need to replace your Temptrol trim's dome cover, easily re-fit it with this repair part. With the Temptrol quality you expect, our replacement parts will return your shower to working in no time. From the Manufacturer Since 1939, Symmons has set the standard for uncompromised quality in commercial and residential plumbing products.