A correct step for installing PVC or ABS is to?

• A. Use metal clamps to secure the joint
• B. Let cement set without turning
• C. Insert the pipe into the fitting, give a 1/4 turn and hold until cement sets
• D. Apply primer before cement

Answer: (C)

When joining PVC or ABS with solvent cement, the key step is to insert the pipe fully into the fitting and give it a short twist, then hold until the cement begins to set. This 1/4 turn helps spread the cement evenly around the joint and seats the pipe against the fitting’s shoulder, creating a uniform, gap-free bond. Holding it in place prevents the pipe from moving while the solvent cement cures, which is essential for a leak-free joint.

Using metal clamps isn’t part of a proper solvent-weld joint, since the bond relies on the cement rather than mechanical clamps. Letting the joint set without turning would likely leave uneven cement coverage and potential air pockets, weakening the bond. Primer is a preparatory step that is commonly used before cement to soften the surfaces and improve adhesion, but the critical practice highlighted here is inserting with a twist and holding until the cement sets to ensure a strong, continuous seal.