What is a Dry Riser?

A Dry Riser is a system of pipework and valves fitted to multi-level buildings, it is a vertical pipeline which runs up the building to the top floor or roof.  This pipe is usually 100-150mm diameter allowing high volumes of water to be delivered as required.  The pipe is normally empty or ”dry”. At each of the floor levels usually in a stairwell there is a fire hydrant or outlet, sometimes known as a Landing Valve.  At the ground level, outside of the building there is a Dry Riser Inlet, known as an Inlet Breeching

How does a Dry Riser work?

If there is a fire within the building the fire service will attend and connect their fire appliance to the inlet, the fire fighters then carry the empty hose up to the floor which is on fire and connect the hose to the outlet landing valve, the fire engine then charges the dry riser with water and supplies the fire fighters with vast quantities of pressurised water

Do I need to maintain this?

Yes, Dry Risers like other items of fire protection form an integral part of the buildings fire strategy, the RRO 2005 states equipment and devices are subject to a suitable system of maintenance.  BS9990:2015 recommends pressure testing the system to design operating pressure annually and inspection of all valves, boxes, locks, seals every 6 months.

Our engineers here at LJM have been testing Dry Riser systems for over 20 years so you can be sure you will get excellent service from experienced personnel

What is involved with the test?

Firstly, each of the Landing Valves are serviced and lubricated, Outlet Seals are checked and Gland Seals checked and lubricated.  All Inlet and Outlet Cabinets are inspected, Hinges & Locks oiled and Glass inspected.  The Inlet Breeching is inspected and seals checked along with Drain Valves and Air Release Valves

The hydro test or wet test as it is sometimes known involves pressurising the line to its design pressure, we do this by pumping in high volumes of water from our hydro test pump.  The test is held for 15 minutes and any pressure drop is recorded.

What happens if the system fails?

If the system fails for any reason our engineers carry spares so they can get your system back up and running as soon as possible, depending on the nature of the failure

Why choose LJM?

We have extensive knowledge and experience in testing and repairing Dry Riser systems.  Our engineers are fully trained and have vast experience in the necessary core competencies required for Dry Riser maintenance including Hydraulic testing, Valve overhaul and Valve identification, and Pipe fabrication