# Sprinkler guides

Fire Sprinklers has 8 guides on fire sprinkler contractors for installation, inspection, testing, repair, fire pumps, standpipes and backflow prevention, grouped by country.

## General

- [How to check a sprinkler contractor licence by state](https://firesprinklers.fyi/guides/check-sprinkler-contractor-licence-by-state.md): Find the right public register, match the business identity and check that the listed scope fits your proposed work.
- [How to choose a fire sprinkler contractor](https://firesprinklers.fyi/guides/choose-a-fire-sprinkler-contractor.md): Compare credentials, system experience, written scope, reports and corrective work before choosing a contractor.
- [Fire pump testing: what an owner should request](https://firesprinklers.fyi/guides/fire-pump-testing-for-building-owners.md): Prepare for a pump flow test, ask for comparable results and keep a report that supports corrective action.
- [NFPA 25 inspection, testing and maintenance frequencies](https://firesprinklers.fyi/guides/nfpa-25-inspection-testing-maintenance-frequencies.md): Build a task register from sourced frequency summaries. Separate routine checks from annual service and longer interval work.
- [Residential sprinkler rules and NFPA 13D](https://firesprinklers.fyi/guides/residential-fire-sprinkler-rules-nfpa-13d.md): Use the residential installation standard as a starting point. Confirm local adoption and coverage with the building authority.
- [What does a sprinkler inspection cost?](https://firesprinklers.fyi/guides/sprinkler-inspection-costs.md): Request comparable quotes for sprinkler inspection and testing. Separate the base scope, special tests, reporting and corrective work.
- [Sprinkler retrofit rules for existing buildings](https://firesprinklers.fyi/guides/sprinkler-retrofit-rules-existing-buildings.md): Get a building-specific answer before you plan a retrofit. Record the local rule, design basis and project responsibilities.
- [Wet, dry and pre-action sprinkler systems](https://firesprinklers.fyi/guides/wet-dry-preaction-sprinkler-systems.md): Understand what fills the pipes, how water enters them and which records to request before hiring a contractor.