Install Instructions

1/8" Slack per foot
Vermin Protection
Protect tube from exposure to rodents or other
nuisances that may damage the tubing.
Water Hammer Exposure
Water Hammer is generally dened as the damaging
pressure surge and banging noise caused by the
quick stoppage of the water column when a valve or
faucet is turned off abruptly. PEX tubing, like all other
materials, needs to be protected from water hammer
by the installation of certied water hammer arresters.
If left uncontrolled, the water hammer pressure surge
can exceed the pressure ratings for the tube, causing
damage to the system and/or system components. Both
the UPC and IPC model codes require the installation
of ASSE 1010 water hammer arresters, regardless of
tubing material. (See Sioux Chief's website for a full line
of water hammer arresters for any application.)
Bend Radius
TUBE
STANDARD
BEND RADIUS
BETTER
BEND RADIUS
AGAINST
COIL SET
BEND RADIUS
1/2" 3.75" 5" 11.25"
3/4" 5.25" 7" 15.75"
If coiled tubing is being used and the bend direction is
against the coil direction, multiply noted bend radius
by a factor of 3. Warmer tubing bends more easily.
Generally a bend radius of 8x tube diameter should be
sufcient. Using a manufactured PEX bend support will
aid in assuring the proper bend radius.
Thermal Expansion
Linear expansion of PowerPEX tubing is approximately
1 inch per 100 feet of tubing for every 10°F change in
temperature.
Do not install tube supports or hangers too tightly.
Allow for expansion of tube when bracketing and
supporting PEX by allowing 1/8" slack for every 1 foot
of linear installation.
For large tubing runs, a tube loop can be installed to
allow for proper expansion and contraction.
Approx .33" of slack
for every 32" between
horizontal tube support
Bend radius
Tubing Installation Requirements & Limitations
Continued
1¼" PEX
Tubing Installation Requirements & Limitations
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