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Keep your fire sprinkler system looking professional and up to code with metal fire sprinkler trim rings and thermoplastic Kydex rings from QRFS. These easy-to-install accessories cover gaps in ceilings and walls caused by oversized holes cut around sprinklers installed in finished surfaces. Trim rings—sometimes called “oops rings”—provide a clean, finished appearance when an escutcheon or cover plate is not big enough to cover the hole, while maintaining the safety and function of your fire protection system.
A fire sprinkler trim ring fits neatly behind a sprinkler’s escutcheon or cover plate to conceal oversized ceiling cuts or alignment errors. These parts come in two types: metal trim rings made of durable steel and Kydex rings made of fire-resistant thermoplastic. Metal trim rings offer a more polished appearance, while Kydex rings are cuttable, offering greater sizing flexibility.
Trim rings are available in multiple sizes and finishes to meet the needs of various sprinkler installations and the differing sizes of covers and escutcheons. Whether you’re retrofitting older systems or completing a new install, QRFS makes it simple to find the right fit.
Each trim ring is designed for easy installation and compatibility with a wide range of fire sprinkler escutcheons or covers. Choose from options with different inner and outer diameters to match your ceiling openings and the specific fire sprinkler head accessory that the trim ring will surround.
For situations where the ceiling opening is larger than expected, these extension trim rings are the perfect solution. They extend the coverage of the existing escutcheon or cover plate to hide large holes without impacting performance. These rings are especially useful when dealing with seismic design, ceiling tile replacements, or remodels where alignment may have shifted over time.
QRFS offers extension trim rings in two materials and several finishes, so you can easily find the correct item for your job and keep your system compliant and professional-looking.
When precision matters, trust QRFS to provide the right fit the first time. Whether you’re modifying an existing system or preparing for a new installation, our trim rings ensure a neat, professional finish. Buy oops rings online today and keep your sprinkler systems compliant, safe, and visually seamless.
Browse our catalog to shop products online, compare sizes by inner and outer diameter, and find trim rings that are available for fast shipping. Need other fire protection parts? Check out our selection of:
Or return to the QRFS home page to view our complete inventory of fire protection equipment.
A fire sprinkler trim ring, sometimes called an “oops ring” or an “expansion plate,” is used to cover oversized gaps around a sprinkler head where the ceiling or wall opening is larger than an escutcheon or cover plate can conceal. It enables the finished look of an installation and closes gaps that could slightly delay heat collection during a fire.
Trim rings should be installed whenever the ceiling or wall opening is too large for the escutcheon or cover plate alone to cover, and the trim ring is sized appropriately to fill the gap. Oversized holes may occur during retrofits, seismic clearance installations, or when holes are cut larger than intended during the installation of new systems. Putting in a trim ring ensures a clean finish.
To choose the correct trim ring, measure the outer diameter of the escutcheon or cover plate and the diameter of the gap around the sprinkler. The trim ring’s inner hole should fit neatly around the escutcheon or cover without blocking it—a 2-inch inner diameter is usually sufficient to fit around most escutcheons, and a 2-3/8-inch inner diameter typically fits around the cup and plate of most concealed sprinklers. The outer diameter of the trim ring must be large enough to cover the ceiling or wall opening.
A Kydex ring is made from a fire-rated thermoplastic material called Kydex, while a metal trim ring is typically made of steel or aluminum. The key difference lies in flexibility and installation. Kydex rings are lightweight, slightly flexible, and often split so they can be installed around an existing sprinkler head without removing or draining the system. They can also be cut to a specific size. Metal rings tend to have a more polished appearance and may help maintain the fire-resistance of sprinkler penetrations in fire-rated barriers. In contrast, Kydex rings offer faster installation and lower cost.
Metal trim rings come in several standard finishes, including white, chrome, and brass, to match common escutcheon and sprinkler finishes. They are available in a range of diameters to cover various hole sizes—typically from about 4 to 5 inches in outer diameter.