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 main drain test.

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. Test procedure nfpa 25 standard for the inspection testing and maintenance of water based fire protection systems published by the national fire protection association nfpa requires that a partial flow trip test of a dry pipe system be conducted annually. A main drain test is used to identify major reductions in water flow for the system under. 13 2 5 main drain test.

Closing the main control valve and opening the main drain allows the system to be completely drained for maintenance or repair purposes and nfpa 25 requires the main drain and the piping that leads to it to be tested on an annual or quarterly basis. 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. From the 2017 edition of nfpa 25. 13 2 5 main drain test.

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. 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 13 2 3 proper drainage for main drain recommend drain be piped properly. 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.

The test essentially measures the water pressure in the system. Nfpa 25 13 2 4 2 main drain test record the static water supply pressure in psi as indicated gauge. The annual test frequency is a minimum requirement nfpa 25 permits more frequent testing if desired. Nfpa 25 code 13 3 2 2 5 main drain test.

From the 2017 edition of nfpa 25. Main drain damaged or missing valve i e broken handle. Close the alarm control valve or alarm valve.