Uponor AquaSAFE, Installation Manual, Page: 65 / 72

You can add an optional gauge trim consisting of an additional
short, galvanized threaded nipple, a ½" galvanized threaded
tee, a ½" x ¼" galvanized threaded bushing and a 30 psi or 60 psi
pressure gauge.
The flow test bucket can be anything that can hold 30 gallons of
water (see Figure 11-3). This bucket will need to be marked before
performing the flow test. To mark the bucket, fill the bucket
in one-gallon increments and mark each water level with a
waterproof marker until you reach the 30-gallon level. Make
sure all measurements are as accurate as possible since slight
variations could dramatically affect the final waterline. This
bucket can be used for multiple flow tests.
The rigid pipe can be cut-to-length on the jobsite. It is used
to direct the flow of water into the bucket.
Performing the test
1. Locate the most hydraulically demanding sprinkler. The
demanding sprinkler is shown on the fire protection
drawing in the ‘hydraulically most remote sprinkler’ detail.
2. With the system turned off and drained, remove the sprinkler
from the sprinkler head adapter fitting.
3. Insert the flow test assembly.
4. Attach the test orifice to the end of the test assembly.
The test orifice must match the size of the hydraulically
demanding sprinkler head. Dismantling a spare sprinkler
is the best way to ensure you have the proper orifice size.
5. Charge and fill the system.
6. Open the ball valve on the test assembly and flow water
until air is completely out of the system. Trapped air will
negatively affect the flow test.
7. Once air is purged, close the ball valve on the test assembly
and prepare the test bucket.
8. Open the apparatus and perform a timed flow for
one minute.
9. If the amount of water in the bucket matches or exceeds
the calculated flow on the plan, the flow test is a success.
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