User Guide

Installing PureFlow Systems
38
PG-PF 724998 0320 PureFlow System
Keep Viega PureFlow PEX tubing a
MINIMUM of 12" vertically and 6"
horizontally from sources of high
heat such as gas 󶈶ue vents, heating
appliances, or electric motors.
Maintain a minimum 12" of vertical and 6" of
horizontal clearance from recessed lights and
appliance or heater vents.
6" minimum
Concerning recessed lighting (including
low-voltage types) and proper installation
clearance, Viega recognizes the following
types of lighting 󶈵xtures: Type IC or
Inherently Protected, which allows direct
contact with thermal insulation and other
combustible materials, and Type Non-IC,
which requires a minimum clearance of
3" from thermal insulation. If room does
not allow for the minimum clearance
spacing speci󶈵ed by Viega, then the PEX
tubing must be insulated with a suitable
pipe insulation capable of withstanding
the speci󶈵c maximum temperatures
generated by the 󶈵xture. Minimum
clearance between any pipe insulation and
󶈵xture shall be per the requirements of the
󶈵xture type and local building codes.
Forced air heating ducts and PVC power
vent 󶈶ues are not generally considered
sources of high heat. These areas
of installation should be rechecked
after further construction and other
mechanical systems have been installed.
In cases where light leakage (direct
beam) from a UV-generating light source
(special lighting or heating-type lamps)
is possible, tubing must be adequately
protected with light-blocking insulation.
Heaters, Flues, Vents, and Recessed Lights
12" minimum