How Often Does a Dry Riser Need to Be Tested?

Most building managers know they need a dry riser test "once a year" — but the full picture is a little more involved. Here's a clear breakdown of the complete testing schedule required under BS 9990:2015.

The short answer

Under BS 9990:2015, a dry riser must have:

• A full pressure test every 12 months
• A visual inspection every 6 months (between annual pressure tests)

So in practice, you should expect an engineer visit twice a year: once for the full pressure test, and once for the interim visual inspection approximately six months later.

What does the annual pressure test involve?

The annual test is the main compliance event. It involves physically pressurising the dry riser system using a pump appliance connected to the inlet breeching. The engineer will:

• Pressurise the system to the required pressure (typically 12 bar)
• Check every outlet on every floor for leaks and correct operation
• Test all valves, including landing valves and the main inlet valve
• Inspect signage, cabinet condition, and pipework
• Issue a pass certificate if all criteria are met, or a defect report if not

The test typically takes 1–2 hours for a standard building, depending on the number of floors and outlets.

What does the 6-monthly visual inspection involve?

The interim inspection is less involved than the annual test — no pressurisation takes place. The engineer will walk the building and visually inspect:

• The inlet breeching at street level — condition, caps, signage
• Outlet cabinets on each floor — door condition, hose reel if applicable
• Visible pipework for corrosion or damage
• Floor identification and fire service signage
• Any access issues (locked rooms, blocked access)

A written report is produced. If issues are found, remedial works are recommended before they become a full failure at the next annual test.

When else might extra testing be needed?

Beyond the regular schedule, additional testing is required after:

• Remedial works — any significant repair to the system requires a re-test before the system is recertified
• Building works — if contractors have worked near the dry riser or connected services, a post-works check is prudent
• After actual use in a fire — the fire service will typically notify you, and the system should be inspected and tested before being returned to service
• Commissioning — new installations require commissioning tests before the system is accepted

How do I keep track of due dates?

The simplest way is to keep your test certificates in an accessible location (a fire safety logbook on site is required by BS 9990), and to use a maintenance provider who sends automatic reminders. When you book with us, we track your test dates and send reminders at 6 and 11 months so you're never caught out.