Instructions / Assembly

®
System 1738 Installation Methods18
7) APPLICATOR SIZE
Use the proper size cement
and primer applicator for the
size of pipe or fittings being
joined. As a general guide, the
cement applicator size should
be approximately 1/2 of the
pipe diameter. It is important that a satisfactory size
applicator be used to help ensure that sufficient layers
of cement are applied.
Priming Guidelines
8) Using the correct applicator (as outlined in step #8),
aggressively work the primer into fitting socket, keeping
the surface and applicator wet until the surface has been
softened.
9) Aggressively work the primer on to the end of the pipe
to a point 1/2" beyond the depth of the fitting socket.
10) A second application of primer in the fitting socket is
required.
11) Immediately and while the surfaces are still wet, apply
the appropriate System 1738 cement using the solvent
welding guidelines that follow.
System 1738 primer is mandatory for installation
temperatures at or below 32
o
F (0
o
C).
NOTICE
6) DRY FITTING
Before applying primer or
solvent cement, test all
connections (pipe, fittings
and accessories) to confirm
a proper interference fit
exists. Dry-fit contact
between properly beveled
pipe and fitting sockets
is essential in making a good joint. The beveled pipe
should easily enter the fitting socket and make contact
with the inner fitting socket wall before bottoming out
in a dry fit. A proper interference fit is present when the
beveled pipe can only be inserted 1/3 to 2/3 of the way
into the fitting socket.
DO NOT SOLVENT WELD PIPE, FITTINGS OR
ACCESSORIES THAT FIT LOOSELY TOGETHER OR
WHERE PIPE BOTTOMS OUT IN A DRY FIT. Proper
joint strength cannot be developed. Do not solvent
weld pipe, fittings or accessories if a beveled pipe
cannot easily be inserted at least 1/3 of the way into
the fitting socket. This may cause excessive stresses
during assembly leading to joint failure.
CAUTION
5) CLEANING
Using a clean dry cloth,
wipe any dirt and moisture
from the fitting socket and
the pipe end. Moisture
will increase cure times
and dirt and grease can
prevent adhesion.