Fire Sprinkler Inspection Requirements

The following inspection and tests are required where NFPA 13 and 13R fire sprinkler systems are installed.  Please schedule inspections 24 hours in advance by calling 636-528-8567.

1. Underground Visual Inspection

The visual inspection is conducted after all piping, fittings, valves and other appurtenances are fully installed, but before the trench is backfilled.  Inspection points include:

a.  The type of pipe, fittings, etc. are permitted for use by NFPA 13.
b.  The trench depth is appropriate (minimum 48 inches) measured from top of pipe to finished grade.
c.  Pipe enters the building at least 12 inches below the foundation.
d.  Joints are not located under the foundation.
e.  Additional requirements as required by NFPA Standards.

2. Underground Hydrostatic Test

The Underground Hydrostatic Test consists of the following:

a.  All valves are open.
b.  The test pump is disconnected.
c.  A gauge is located at the lowest point (or fire hydrant if newly installed on the same main.)
d.  The underground main has been pressurized with water to at least 200 psi
e.  The underground main holds the pressure for 2 hours with a loss or gain no greater than 5 psi.
f.  The installing contractor provides a completed “Contractor’s Material and Test Certificate for Underground Piping”
g.  Additional requirements as required by NFPA Standards.

3. Underground Flow Test

a.  Minimum acceptable flush opening and line is 4 inches.
b.  The discharge flush line is mechanically secured.
c.  Burlap bag (s) are secured over the discharge point.
d.  Flush test performed until water runs clear with no signs of foreign material.
e.  Contractor measures GPM with pitot tube or other acceptable means.
f.  Actual GPM meets the hydraulically calculate demand for the fire sprinkler system.
g. Additional requirements as required by NFPA Standards.

4. Aboveground Hydrostatic Test

a. All valves are open.
b. Test pump disconnected.
c. System pressured to 200 psi minimum.
d. System holds pressure for 2 hours, with no loss.
e. Contractor submits completed “Contractor’s Material and Test Certificate for Aboveground Piping.”
f. Additional requirements as required by NFPA Standards.

Dry systems require an additional air pressure test at 40 psi for 24 hours.

5. Final Acceptance

A final acceptance test will be performed which includes flowing the system, checking signage, operation of control valves, testing tamper and waterflow alarms, presence of spare sprinklers and tools and ensuring the system is in full operation.