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Applicators:
Select a suitable pure bristle type paint brush. Use
a proper width brush or roller to apply the primer
and cement (see chart below). Speedy application
of cement is important due to its fast drying
characteristics. IMPORTANT NOTE: A dauber type
applicator should only be used on pipe sizes 2” and
below. For larger diameter pipe, a brush or roller
must be used.
RECOMMENDED BRUSH* SIZE FOR
PRIMER AND CEMENT APPLICATIONS
Nominal
Pipe (IPS)
Brush Size
2
1.5”
3
1.5” - 2.5”
*USE ONLY NATURAL BRISTLE
Table 4
3. MAKING THE JOINT
A. Cutting
Pipe must be squarely cut to allow for the proper
interfacing of the pipe end and the
fi
tting socket
bottom. This can be accomplished with a miter box
saw or wheel type cutter. Wheel type cutters are not
generally recommended for larger diameters since
they tend to
fl
are the corner of the pipe end. If this
type of cutter is used, the
fl
are on the end must be
completely removed.
Note:
Power saws, if used, should be speci
fi
cally
designed to cut plastic pipe.
Figure 30
B. Deburring
Use a knife, plastic pipe deburring tool, or
fi
le to
remove burrs from the end of small diameter pipe.
Be sure to remove all burrs from around the inside
as well as the outside of the pipe. A slight chamfer
(bevel) of about 10°-15° should be added to the end
to permit easier insertion of the pipe into the end of
the
fi
tting. Failure to chamfer the edge of the pipe
may remove cement from the
fi
tting socket, causing
the joint to leak.
Figure 31
C. Test dry
fi
t of the joint
Tapered fitting sockets are designed so that
an interfaced
fi
t should occur when the pipe is
inserted about 1/3 to 2/3 of the way into the socket.
Occasionally, when pipe
fi
tting dimensions are at
the tolerance extremes, it will be possible to fully
insert dry pipe to the bottom of the
fi
tting socket.
When this happens, a suf
fi
cient quantity of cement
must be applied to the joint to
fi
ll the gap between
the pipe and
fi
tting. The gap must be
fi
lled to obtain
a strong, leak-free joint.
D. Inspection, cleaning, priming
Visually inspect the inside of the pipe and
fi
tting
sockets and remove all dirt, grease or moisture
with a clean dry rag. If wiping fails to clean the
surfaces, a chemical cleaner must be used. Check
for possible damage such as splits or cracks and
replace if necessary.
Depth-of-entry
Marking the depth of entry is a way to check if the
pipe has reached the bottom of the
fi
tting socket
in Step F. Measure the
fi
tting depth and mark this
distance on the pipe O.D. You may want to add
several inches to the distance and make a second
mark as the primer and cement will most likely
destroy your
fi
rst one.
Apply primer to the surface of the pipe and
fi
tting
socket with a natural bristle brush. This process
softens and prepares the PVC or CPVC for the
solvent cementing step. Move quickly and without
hesitation to the cementing procedure while the
surfaces are still wet with primer.
