Dry/Wet Riser Maintenance
Dry/Wet Riser Maintenance
About Dry/Wet risers
What are dry and wet risers systems used for?
Where do we find dry/wet risers?
Dry/wet risers are intended for the use of the Fire Service to
provide a readily available means of delivering considerable
quantities of water to extinguish or to prevent the spread of fire.
If your fire risk assessment concludes that you may need the
intervention of the Fire Service to fight a fire, you must ensure
that your riser systems or hydrants are working properly.
Dry risers will be found:
Before installation of dry or wet rising mains, the local Authority
and Fire Officer must be consulted to ascertain their exact
requirements.
• in buildings over 18 metres above ground level.
• in low level buildings where there are excessive distances
from entrances (60m)
Wet risers will be found in buildings over 60 metres above
ground level.
Industrial
Commercial
Telecommunications
Education
Retail
Hospitals / NHS
What is the difference between dry riser and wet
riser? (Dry/wet risers are often called Rising Mains)
Dry riser: system of valves and pipework which enables the Fire
Service to pump water on to upper floors of a building.
Wet riser: system of valves and pipework which are kept
permanently charged with water.
A Dry Riser System
Air Release Valve
What does a dry/wet riser system look like?
Landing Valve
Typical dry/wet risers contain the following components:
• large vertical pipe of 100 mm diameter that can run internally
or externally to the building
• twin inlet connection at street level boxed in a steel cabinet
with glazed door for dry riser only
• outlet valves at each landing
• automatic air release valve at the highest point to provide automatic bleeding of air from the system when it is filled with water
Landing Valve
• pump for wet riser only
Why do dry/wet risers need to be serviced?
External Wall
• risers are prone to neglect and vandalism
• severe penalties should the rising main fail to work for the Fire
Service
• leaking from a wet riser could cause substantial damage
Gate Valve
Landing Valve
BS 5306 Part 1 1976 recommends for dry risers:
Steel Cabinet
with Glazed
Door
25mm Drain
Valve
Ground Floor
•
a visual inspection every six months
•
an annual pressure test
BS 5306 Part 1 1976 recommends for wet risers:
•
2 visual inspection services per year
•
2 electric pump inspection services per year
•
1 flow test per year (if applicable)
What can I expect from the mechanical service
engineer visit?
Chubb Fire’s offer for dry/wet riser servicing
• On arrival, our engineer will report to the authorised person
and explain the reason for the visit
Dry Riser
• Our service engineer will service the dry/wet riser in
compliance BS 5306 Part 1 1976
• After the service, the service label will be completed by the
engineer
• A service certificate including the inspection details will be
issued to the customer. For any major faults found at the time
of the service, the customer will be issued by our office a
document including our recommendations and cost
implication
• Only when the service work is carried out will an invoice be
raised
The maintenance process
Dry riser annual pressure test service
• Carry out a visual inspection service from roof to ground
floor of the entire system
Chubb Fire provides two types of service in accordance with BS
5306 Part 1 1976:
• Visual inspection service
• Annual pressure test service (that includes a visual inspection
service)
Wet Riser
Chubb Fire provides three types of service in accordance with
BS 5306 Part 1 1976:
• Visual inspection service
• Electric pump service
• Flow test
The Chubb Fire Riser System maintenance package
Chubb Fire operates a nationwide network of specialist mechanical
service engineers.
Chubb Fire Riser System maintenance package includes: Standard
Support from our 24 hour customer service centre
Availability of our engineers 24 hours a day, 365 days a year
Servicing in accordance with BS 5306 Part 1 1976
12 months warranty for additional fitted equipment
• No appreciable loss in pressure (0.5 bar) shall be seen
whilst the test is in progress or the test shall be failed
Review of your dry/wet risers system requirements against
latest standards
• Drain dry riser completely on completion
Engineer call out charges
Additional
charges apply
Wet riser flow test service
Fitting of replacement parts as a result of normal
wear and tear*
Additional
charges apply
• Carry out a visual inspection service
Rapid response to all emergency call outs
• Carry out flow test in pump room if built in Flow test
arrangement exists
Additional
charges apply
* All parts supplied are approved to BS 5041.
• Test the riser with water and pressurise to 10 bars
measured at the inlet for a period not less than 15 minutes
• Whilst test is in progress check entire system for any
obvious leakage
• Carry out flow test at roof hydrant if conditions allow
• Check pressure of system using installation built in pressure
gauge arrangement
Why choose Chubb
Security and Fire Protection
• A company you can trust. One hundred and eighty years
of history and innovation have made Chubb into a global
leader in security and fire protection. The name Chubb is
synonymous with fire protection and security solutions.
Prevent fire
Fire risk assessment
Fire risk management
Fire training
• A company with resources. Chubb employs over 40,000
people around the world and sales exceed £1.5bn per year –
supplying systems and services to most of the FTSE 100
companies.
Gas detection
Service and maintenance
Detect fire
• National service with local back-up. Chubb can design,
install, maintain and monitor systems using the latest
technologies. With a nationwide team of local engineers,
Chubb can look after the needs of single sites or high
street multiples.
• Working to suit your individual needs. With a fire risk
assessment led approach, Chubb can work with businesses
large and small to help them comply with the latest fire,
health and safety regulations.
Fire detection systems
24/7 fire alarm monitoring
Contain fire
Fire extinguishers
Hose reels
Fire extinguishing systems
Sprinklers
• Flexible approach to financing. A range of purchase and
rental options allows Chubb customers to choose a payment
method suitable for their business.
Escape fire
Emergency lighting
• Maintaining and raising standards to ensure customers
comply. Chubb is BS EN ISO 9001 approved for the
manufacture and maintenance of fire extinguishers and only
provides approved fire safety signs. Chubb is also
independently audited to British Standards by the BSI.
Training
• Government approved. Chubb Fire is the approved
supplier of fire protection for the NHS and for Central and
Local Government offices, schools and universities.
Electronic Security
Voice alarms
Fire safety signs
Security Personnel
www.chubb.co.uk
Call 0800 32 1666
Although great care has been taken in the compilation and preparation of this leaflet to ensure accuracy, the publishers cannot in any circumstances accept responsibility for errors, omissions or advice given in this
publication. Readers should be aware that only Acts of Parliament and Statutory Instruments have the force of law and that only the courts can authoritatively interpret the law.
GCF554M/07/04