Wet Riser
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Wet Riser System Design (Wet /pre-pumped standpipes)
Wet riser installation is a fire-combating system found in high buildings. It is used to supply water to different parts of a building through the installed pipe size system, mostly for firefighting purposes. Wet risers are usually filled with water. In a fire fighting operation, it can be used automatically or manually. Which is why pressure testing is important.
The wet riser is capable of supplying up to 1500 litres of water per minute. It is built to sustain this amount of water supply for up to 45 minutes at least. If the wet riser performs below expectations, employ the right wet riser testing services to correct it.
If a building is more than 50 metres high, a wet riser is essential to guarantee its safety. In the eventuality of a fire outbreak, the chances of rescuing such building will be high. In houses that are less than 50 metres in height, a dry riser or a wet riser fire main can be installed.
A wet riser should have some parts like the jockey pump and the jockey pump controller. There is also a jockey pump starter. There is an electric pump and electric pump controller.
Wet Riser Maintenance and Testing
The working of a wet riser is not too delicate to understand. It is a fixture of valves and pipes. This connection makes it easy to get water to all floor levels. A wet riser is a system of vertical pipes fitted to tall buildings. These pipes are connected to landing valves in every floor of the building, save the ground floor. The pipe is attached to a water supply permanently. This water supply feeds the pipe with water. Water is drawn from the supply using duplicate automatic pumps. Pipe fittings are usually galvanised, flanged, grooved, or screwed. When there is a fire outbreak, the wet riser system makes it possible to distribute water to every building’s compartment. For safety purposes, water is meant to be available always. As such, the wet riser has an automatic warning system to signal a low water level.
The outlet at each floor has a water pressure reduction valves to aid water supply to the floors. The outlet pressures recommended for buildings is 8 Bars.
Importance of Using A Wet Riser
The ultimate reason for installing wet risers in tall buildings is safety. A wet riser helps to secure lives and properties. In a residential area, there are several activities involving the use of fire. In a corporate environment, the chances of a fire outbreak are not limited.
Installing a wet riser enhances business safety. It can protect your business and property from fire. When there is a fire outbreak, firefighters can easily let water into the house’s upper levels through the wet riser.
Installing a wet riser is a way of ensuring that water flows around your house and premises. This essential step safeguards your surroundings against fire. If there happens to be a fire outbreak, curtailing it will be way easier with a wet riser system.
With a wet riser system, firefighter’s response to a fire outbreak situation will be faster. It saves them the time used to set up their equipment.
Advantage Of A Wet Riser?
The wet riser is advantageous in high buildings compared to the dry riser. The wet riser provides the required pressure to charge the riser. With the wet riser and their firefighting appliances, firefighters can get water to all house levels.
Wet risers should be located in areas where they will be safe and easily accessible. In the case of an emergency, firefighters can set their rescue running in no time. Areas like in a stair case, lobbies or other safe enclosures are suitable.
Testing and Wet Risers Maintenance
Maintaining a wet riser is essential. A damaged wet riser puts a house at risk the same way the absence of it does. Only professional wet riser testing services providers should handle the wet risers.
Maintaining a wet riser lies with the owner or housing agent or the management in charge of the building. British Standard 5306: Part 1 1976 (Revised by BS9990) recommends an annual servicing and a “full wet test” of the wet riser. It also stipulated a biannual visual inspection.
These inspections and maintenance are meant to guide against anything that can hinder the smooth operation of firefighters in a situation.
The riser should be checked by a professional. Maintenance includes checking for anything that can pose danger. The pipes should be checked for mechanical wet riser failure and blockage. The outlets should be check to ensure they are in position.
Outlet and inlet fittings can get out of position if tampered with. They can also be damaged or stolen. Replacement of damaged parts will be essential.
Whenever the wet riser is inoperative or fails, its repair should be treated with urgency. Repair and replacement call for urgent action and it should be done professionally.
Maintenance also includes ensuring the pipes are clean in and out. Making sure that all nuts and handwheels are intact and not rusted. Ensuring that all blank caps, chains, cabinet, signages, etc. are intact, clean, and functional.
The valves on the rising mains are isolated at intervals to enable thorough repairs. Isolated sections can be cleaned easily.
Benefits of Maintaining the Wet Riser
Good maintenance will ensure the valves and pipes are in good shape. Consequently, the wet riser system will deliver well when in use.
Good maintenance will ensure that the wet riser maintains the pressure that is essential for firefighting. Getting water to the top floors will be easier and faster.
A well-maintained wet riser will be easy to use. Maintenance will keep the connections in good shape and order. In the case of an emergency, the operation will be smooth.
The Need for Wet Risers
Buildings taller than 18m are required by law to have fire mains. You will find this under building regulations, Fire Safety section, Part B. Other buildings under 50 m height should have either wet risers or dry risers.
Wet risers are necessary for buildings that are 50 meters taller than the access level of rescue service vehicles. The risers need a lot of pumping pressure to get filled with water. For these buildings, that pressure is higher than what fire service pumps can offer. With such pressure-demand, fire service equipment might not pump enough water at the required speed.
Wet risers are supplied water from sources with high pressure. In most cases, storage tanks that have landing valves at specific locations on different floors are used.
In cases of emergency, fire service pumps could supplement wet risers’ supply of water. For instance, if the storage tank is running low. This problem could probably be because the rescue is taking too long.
Regulations Guiding the Use of Wet Risers
Appliances that pump water should be placed around 18 m of the main inlet of water. They should be within sight around a suitable entrance, thereby allowing access to the water inlet.
Generally speaking, the minimum pressure for a wet riser’s supply system at the roof level is 4 bar. Similarly, its flow rate should be about 22.7 litres per second. The maximum pressure allowed per outlet is 5 bar.
Firefighting shafts should house wet risers. If needed, escape stairs can protect them. If available, stairs or protected lobbies can house the landing valves or outlets of wet risers.
Additional Services
Dry Riser Installation
Looking for #1 UK dry riser installation and wet riser installation company? We are an experienced team of professionals and can come to your location anywhere within the UK. Keep your buildings protected from a fire.
Now, it’s important to protect your building against the possible outbreak of a fire. To do this, you need dry riser and we provide a cost-effective way of making your building safe. This includes maintenance and dry riser testing. And we test privately owned fire hydrants.
Dry Riser Testing
For dry riser testing, we offer 6-monthly inspections and annual testings required by the British Standard BS9990:15, the latest version of the British Standard BS9990, anywhere in the UK.
We have contracts with FM companies, Block management, and individual property owners throughout the country.
To schedule an appointment for a dry riser inspection or testing, simply call us under 0800 010 6137 or email us at [email protected].
A representative will be in contact with you soon!
Dry Risers Regulations
There is a need to install a functioning and non-automatic fire-fighting system in buildings, especially tall ones. One of such system is a dry riser. The other one is the wet riser system.
A dry riser and wet riser is a rising main composed of a vertical pipe that has an inlet that runs on the outside of the building and outlets which are placed on every floor in the building. With this system in place, firefighters would find it easier to fight fire in buildings that have floors above eighteen meters to the ground and have about six to seventeen stories.
Wet Riser Installation
We fit wet risers correctly in your area whether that’s London, Birmingham, or any other UK area that the fire brigade will appreciate. For your safety and better services, we are experienced contractors that are going to help in fixing test drains, separation regulators, Pressure Relief Valves, and fitting pipework for the main riser on each floor of your building.
Before you finalise any wet riser installation for your business, you must make sure that the whole system is well designed, installed, commissioned, and certified with BS9990 2015.
Fire Hydrant Servicing
Certified hydrant testing – ready to give you a free quote on all work today.
Fire hydrants are used by firefighters to get access to a good and strong water supply. Occasionally, when the closest fire hydrant in a public footway is not close enough to a building, a fire hydrant will need to be set up on private properties.
These are referred to as privately owned fire hydrants. It is important that they are installed by a competent fire hydrant contractor.
Fire Sprinkler Servicing
Every second, every minute counts when there is a fire emergency. Just a few moments’ delay of rescue and mitigating endeavors could spell the difference between lives and properties lost during such instance.
In the UK, fire and rescue services can be reckoned as excellent. However, time is needed for them to reach the location of an emergency. That’s why it is necessary to ensure that an efficient fire sprinkler servicing is regualary done and that it meets British standards.
Fire Safety Training
There are many uses of fire. However, when improperly handled, fire can be dangerous. It can destroy lives and properties, and cause injuries. There are numerous repercussions when a fire happens in the workplace.
Other than those earlier mentioned, it can also cause termination of jobs because plenty of offices and factories that have been destroyed by fire may not be rebuilt. This is why we do BS9990 and BS9251 testing.
Fire Hydrant Flow Testing
Firefighters use fire hydrants to get access to a large supply of water in the event of a fire.To make sure fire hydrants are available in case of emergency, privately owned hydrants need to be installed in every building that doesn’t have access to public fire hydrants.
In case of a fire, the fire engine will be connected to the fire hydrant through a hose.
BS9251 Testing
BS9251 is the British Standard. This is the 2nd version of this standard, originally published in 2005 then reviewed and amended in 2014 with help from members of the fire service and players in the industry.
BS9990 Hydrants and Testing
Most new construction consists of buildings four to eight stories high. However, it is increasingly common to find modern office and apartment buildings containing 20 or more floors. Furthermore, with the advent of “sky scrapers” which are over sixteen stories, we have begun to see a theory that less space per vertical floor equals more efficiency.
HMO Fire Risk Assessment
This is to say that a fire risk assessment is legally required for all HMOs in the UK. This is where you can contact us at Dry Riser Solutions because we have highly-trained and certified fire risk assessors. Including BS9990 inspection.
The HMO fire risk assessment that we implement is specifically designed for HMO properties, and we meticulously have it based on the Lacor’s guide.
