Which statement about solvent cement joints is incorrect?

Which statement about solvent cement joints is incorrect?

• A. Thin cement before applying
• B. Cement joints should be cleaned and primed before applying
• C. Apply cement evenly around the joint
• D. Allow cement to cure before handling

Answer: (A)

Thinning solvent cement before applying is not recommended because the cement is designed to be used as packaged. Diluting it lowers the solvent action, weakens the bond, can leave voids, and alters cure time, all of which can lead to leaks. The correct approach is to clean the joint surfaces, prime them if required, apply a uniform coat of cement around the joint on both the pipe and the fitting, insert the pipe fully (often with a slight twist to distribute the cement), and then allow adequate curing time before handling or pressurizing. This sequence ensures the solvent can fuse the materials properly and the joint gains full strength.

Thinning solvent cement before applying is not recommended because the cement is designed to be used as packaged. Diluting it lowers the solvent action, weakens the bond, can leave voids, and alters cure time, all of which can lead to leaks. The correct approach is to clean the joint surfaces, prime them if required, apply a uniform coat of cement around the joint on both the pipe and the fitting, insert the pipe fully (often with a slight twist to distribute the cement), and then allow adequate curing time before handling or pressurizing. This sequence ensures the solvent can fuse the materials properly and the joint gains full strength.