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Above Floor Installation Guide
Part Number 650-000-221/0298
17
J. Pressure Test the Finished Tubing Installation
1. After all tubing has been routed and connected to the
manifold, pressure test all tubing circuits before
finished flooring is installed. Refer to AlumiPex
Manifold Instructions.
2. Isolate the AlumiPex manifolds and tubing from any
other piping.
3. Attach a pressure gauge with a 150 psig scale range
to the manifold using a high pressure hose.
• Locate the gauge so it can be read during all
phases of construction.
4. Fill the system for pressure test with water only if
there is no freeze potential.
• You will need to keep the system pressurized as
discussed in the next section.
• So the fluid used for testing would have to remain
in place.
• You must be sure, if using water, that no freeze
potential would exist from time of installing pipe
until time for you to complete the system piping
and fill the system for start-up.
5. If there is freeze potential, fill the system with air and
perform the pressure test using air.
• If using air, remove all air vents from the manifolds
and plug the openings.
6. Pressurize the system to between 70 and 100 psig for
30 minutes.
a. Observe the pressure on the gauge.
b. The pressure should not drop unless testing with
air on a cold day.
• On cold days, air pressure testing will show
a drop as the air in the tubing cools off. But
the pressure should reach a steady level and
drop no further.
• If the pressure does drop, check the
connections at the manifolds first.
c. Examine the system for leaks. Repair any leaks
found and repeat the test.
d. Check threaded joints with leak detection fluid
(soap mixture if using air).
Failure to check for and repair leaks can result
in damage to system components and the
premises, causing severe personal injury, death
or substantial property damage.
When pressure testing with air, or when air is
left anywhere in the system being pressurized,
there is a risk of explosive discharge of
compressed air or water if a leak or break
occurs.
Do not leave these pressure tests unattended
while others are present.
Remove all non-essential persons from the
area during pressure testing.
Failure to follow these guidelines could lead
to severe personal injury, death or substantial
property damage.