PEX Installation Manual

57
IM-PF 724596 0416
Male Adapters
Female Adapters
NPT Elbows Adapters
17.3 Threaded connections
The Viega PEX system also provides a number of
ttings to adapt ViegaPEX Ultra and FostaPEX tubing
to NPT threads.
In addition to the NPT drop-ear elbows already
mentioned, metallic male and female adapters and
male NPT elbows provide threaded connections.
The threaded connection should always be made
before the PEX connection to avoid twisting the
PEX connection.
Do not use metallic threaded adapters when
connecting to polymer threads.
Heating
Like standard (leaded) alloys, heating of the
Zero Lead solder joint should be done evenly
and gradually using an appropriately sized tip
with constant movement of the ame over the
joint. Be careful not to overheat the Zero Lead
alloy while making a solder joint. Overheating
will result in a brown discoloration of the metal,
which is an indication that ux has burned out of
the solder joint, potentially causing incomplete
solder coverage. If you suspect this has occurred,
disassemble the joint, clean and repeat the process
using proper heating techniques.
Proper Cool Down
Because Zero Lead alloys have a lower thermal
conductivity than standard alloys they do not
cool down as quickly after making a solder
connection. If excessive heating has occurred and
an accelerated cooling process is required, apply
a damp cloth to the freshly completed solder joint.
This will help minimize the risk of the solder joint
moving or leaking solder out of the joint before the
joint can cool.