19
Table 2
RECOMMENDED BRUSH* SIZE FOR
PRIMER AND CEMENT APPLICATIONS
Nominal
Pipe (IPS)
Brush Size
1.5” - 2.5”
*USE ONLY NATURAL BRISTLE
3
Fig. 23
Fig. 24
10-15°
3, 32" (2.5 MM)
APPROX
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.v
B. Deburring
Use a knife, plastic pipe deburring tool, or file 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 fitting. Failure to chamfer the edge of thepipe may
remove cement from the fitting socket, causing the joint to leak.
C. Test dry fit of the joint
Tapered fitting sockets are designed so that an interfaced fit
should occur when the pipe is inserted about 1/3 to 2/3 of the
way into the socket.
Occasionally, when pipe fitting dimensions are at the tolerance
extremes, it will be possible to fully insert dry pipe to the bottom
of the fitting socket.
When this happens, a sufficient quantity of cement must be
applied to the joint to fill the gap between the pipe and fitting. The
gap must be filled to obtain a strong, leak-free joint.
D. Inspection, cleaning, priming
Visually inspect the inside of the pipe and fitting 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 fitting socket in Step F. Measure the
fitting 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 first
one.
Apply primer to the surface of the pipe and fitting 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.
3. MAKING THE JOINT
A. Cutting
Pipe must be squarely cut to allow for the proper interfacing
of the pipe end and the fitting 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 flare the corner of the pipe end. If this type of cutter is used,
the flare on the end must be completely removed.
Note: Power saws, if used, should be specifically designed to cut
plastic pipe
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