Instructions / Assembly

®
System 1738 Installation Methods 19
Solvent Welding Guidelines
12) Vigorously shake the System 1738 cement can before
using. If the cement is jelled, replace with a new can.
13) Using the proper size applicator for the pipe size
as outlined in #7, aggressively work a full even layer of
cement on to the pipe end equal to the depth of the
fitting socket - do not brush it out to a thin paint type
layer, as it will dry too quickly.
14) Aggressively work a
medium layer of cement
into the fitting socket. Avoid
puddling cement in the
socket by holding the fitting
on an angle.
Excessive cement may cause the fitting to weaken due
to softening by the trapped solvents.
NOTICE
15) Apply a second full, even
layer of cement on the pipe.
Apply enough solvent cement
to completely fill all the gaps
between the pipe and fitting
at socket entrance.
16) Without delay, while
the solvent cement is still
wet, assemble the pipe
and fitting.
18) A bead of solvent
cement must be formed
around the entire socket
fitting entrance. With a
clean, dry cloth, remove
the excess solvent cement
from the pipe and fitting
socket entrance. This
will allow the solvent to
evaporate from within
the joint and prevent
weakening of the pipe.
19) Gently handle newly assembled joints carefully until
the appliance service time has expired. Follow System 1738
Appliance Service Time Schedule outlined in this guide.
17) Hold the pipe and
fitting together for
approximately 30 seconds
to resist pushout due to
tapered sockets. Higher
potential for pushout
exists in colder weather
installations. If pushout
does occur, the joint will
need to be replaced.
The average joint hold time when solvent welding is
30 seconds but can vary depending on installation
temperatures and humidity as indicated in the
Average Appliance Service Time Schedule in this
guide. Reference Step #2 of the Solvent Welding
Preparation Guidelines and Step #17 of the Solvent
Welding Guidelines. For directions on determining how
to mark the pipe, the proper amount of hold time and
evaluating pushout.
CAUTION