Cut pipe square, deburr, and wipe clean. Make a trial dry fit – pipe should fit snugly 1/3 – 2/3 snugly into fitting.
Excessive tolerances (gap) between pipe and fitting that cannot be “filled” by the solvent cement being used.
Check pipe and fitting for proper
dry fit before cementing.
For a good interference fit, the pipe
should easily slip into the fitting
1/3 to 2/3 of the way.
Too tight of a fit is not acceptable because the pipe may not be able to bottom into fitting during assembly.
If the pipe bottoms in the fitting with no interference but not loose, a satisfactory joint can be made provided the pipe and fitting are not out of round.
To see if a fitting is acceptable for bonding, hold a short piece of the pipe in a vertical position and insert the fitting on the end.
If the fitting falls out of the pipe, do not assemble.
Call your pipe and fitting supplier. All pipe and fittings must conform to ASTM or other recognized standards.