PEX Installation Manual

IM-PF 724596 0416
4
Important warning symbols
Important, read and understand
the warnings accompanying this
symbol to ensure your Viega
product is installed correctly and
safely. Ignoring these warnings
could result in product failure
and/or void your warranty.
Limit direct UV exposure
(sunlight) to products that
have this warning symbol
present. Maximum UV exposure
durations may vary based on the
type of product being installed.
Review the warning and/or
limitation listed with the product
being installed.
Do not expose products
with these warnings to any
foreign substances that
include VOC (volatile organic
chemical) compounds, paints,
solvents, glues, cleaners and
disinfectants. Products that
are exposed to these types of
substances are at risk of having
failures (leaks).
Hand-tighten only. Damage may
result if over-tightened.
Contact Viega Technical Services for
questions concerning chemical compatibility.
16 Fastening the Viega PEX System
16.1 Wood frame construction ............ 46
16.2 Steel construction .................. 46
16.3 Supporting ViegaPEX Ultratubing ...... 47
16.4 Noise and water hammer in PEX systems ...48
16.5 Shower valves ..................... 48
16.6 Electrical grounding ................. 48
16.7 Expanding foams .................. 48
16.8 Fire Stop compounds ............... 48
16.9 Tubing expansion ................... 48
16.9.1 Calculating expansion loops and
offsets ...................... 49
16.10 Domestic hot water circulating systems ...54
17 Installing Viega PEX Fittings
17.1 Stub out options ................... 55
17.2 Copper connections ................ 56
17.2.1 Soldering Zero Lead alloy PEX
ttings ..................... 56
17.3 Threaded connections ............... 57
17.4 Valves ............................ 58
18 Pressure Testing Viega PEX Systems
18.1 General .......................... 60
18.2 Air testing ......................... 61
18.3 Leak detection ..................... 61
19 System Disinfection
19.1 General .......................... 62
19.2 California ushing requirements ....... 62
20 Warranty ........................... 63