Standard dimensions for class 3000 full-pipe coupling include 1 1/4 and 3/4 inch for 1/8-inch pipe, 1 7/8 and 1 1/8 for a 1/2-inch pipe, and 3 3/8 and 3 for 2-inch pipe. Other coupling classes have different standard dim... More »

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The "Standard Specification for Poly(Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120 guide," also listed as the ASTM D1785, lists the outside and inside diameters and wall thicknesses for PVC and CPVC pipes... More »

Polychloride vinyl fittings, sized similarly to pipes of the same material, vary by diameter and wall thickness. The difference between the outside and inside diameters are generally standardized into one of two dimensio... More »

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A compression fitting is a coupling used in plumbing to connect two pipes or a pipe to a fixture or valve. These fittings are generally used on stationary connections, such as toilets, vanities and refrigerators. More »

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Temporary repairs can be made with rubber-coated tape or Goop, but to permanently seal a leak in a PVC pipe, use regular PVC adhesive and a coupling. The adhesive and coupling can be purchased at a hardware store or anyw... More »

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To repair a pinhole leak on a copper pipe, first turn off the water, drain the pipes, cut out the affected area and solder on a new pipe coupling. Using a coupler is acceptable for pinhole leaks where less than 1/2-inch ... More »

Some commonly used copper pipe sizes are 1/4 inch to 8 inch tubes that come in 20 foot lengths, 10 inch pipes that come in 18 foot lengths and 12 inch pipes that come in 12 foot lengths. These are straight pipes. More »

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