Nfpa 25 Main Drain Test

According to nfpa 25 every fire sprinkler system has to have at least an annual inspection of its main drain to be sure it is clear.

Nfpa 25 main drain test.

Protection systems published by the national fire protection association nfpa requires that the main drain of an automatic sprinkler system should be tested at least annually and more often for special conditions as noted in table 13 1 1 2 of nfpa 25. Nfpa 25 code 13 3 2 2 5 main drain test. Slowly open the main drain fully and allow. Main drain damaged or missing valve i e broken handle.

Nfpa 25 13 2 4 2 main drain test record the static water supply pressure in psi as indicated gauge. Test flow test 5 years 6 3 1 hose 5 years 3 years nfpa 1962 hose connections annually 6 2 1 hose valves chapter 13 hydrostatic test 5 years 6 3 2 main drain test chapter 13 pressure control valve chapter 13 pressure reducing valve chapter 13 supervisory signal devices except valve supervisory switches chapter 13. Close the alarm control valve or alarm valve. 13 2 5 main drain test.

The annual test frequency is a minimum requirement nfpa 25 permits more frequent testing if desired. 13 2 5 main drain test. The test essentially measures the water pressure in the system. Damaged or missing valve ie broken handle nfpa 25 code 13 2 5 low incoming water pressure systems without fire pump compare current flow pressure to previous performed main drain results if pressure has reduced 10 or more main drain is found deficient nfpa 25 code 13 2 5 2 systems with.

If you have a backflow device you need to have a test performed on at least one of your systems on a quarterly basis. A main drain test is used to identify major reductions in water flow for the system under. Additionally at least every three years a full flow trip test should be performed. From the 2017 edition of nfpa 25.

Nfpa 25 13 2 3 proper drainage for main drain recommend drain be piped properly. A main drain test is required annually or any time the water supply control valve is closed this includes any time a system undergoes maintenance or repair. A main drain test shall be conducted annually for each water supply lead in to a building water based fire protection system to determine whether there has been a change in the condition of the water supply.