Most residential angle stops are designed to fit standard plumbing dimensions. The inlet side, which connects to the water supply pipe, is typically sized for 1/2-inch copper tubing or 3/8-inch compression fittings. In older homes, you might encounter 3/8-inch copper lines, while newer constructions often use 1/2-inch lines. The outlet side, which connects to the flexible supply line leading to the fixture, is almost universally 3/8-inch compression. This standardization ensures compatibility with most faucets, toilets, and appliances. However, it is crucial to measure the existing supply pipe before purchasing a replacement, as variations exist. Some angle stops are designed for PEX or CPVC pipes, which may require different connection methods such as push-fit or solvent weld. Additionally, the overall length and reach of the angle stop can vary, so measuring the distance from the wall to the fixture is important to ensure the valve and supply line will fit properly without strain. Always check the manufacturer’s specifications for exact sizing details.
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