Wide Fit:The R2707 rough-in valve is compatible with most D 3-hole faucets, allowing you to upgrade or replace your deck faucet easily without needing to change the plumbing underneath Simple Installation: Quick couplings are designed for easy connections without welding, enabling self-contained installation without the need for a plumber, saving both time and money Long Lifespan: The main body is made of high-quality brass, which has high compressive strength and resists deformation, ensuring the product's durability Flexible Installation: Designed to accommodate 3-hole, 8-16 inch widespread tub faucet configurations Hole diameter: 1.26inch (min)- 1.57inch (max); can be installed on thick or thin surfaces up to 1.57 inches thick Upgrade R2707 is the upgraded version of the Faucet Roman Tub Rough-In Valve R2707. Previously, installation required welding; now, quick joint connections eliminate the need for welding. This allows for independent installation without a plumber, significantly reducing installation difficulty.