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Dry Risers and Testing Facilities
dry riser inlet box
twin inlet breeching
horizontal landing gate valve
Typical Arrangement of Dry Rising MainAir release valve Landing outlet valve
Landing outlet valve
External wall Steel cabinet with glazed door 2 Way inlet breeching 25mm drain valve Landing outlet valve
Design and SupplyDry risers are systems of valves and pipework which enable the Fire Brigade to deliver water onto upper floors of a building. Generally, a dry riser system will be required where any floor of a building is over eighteen metres above ground level. Since dry riser systems are used by the Fire Brigade, particular attention must be paid to the design of the system to ensure the valves are correctly sited, with adequate space to enable efficient use of the equipment. A typical dry riser system will comprise a vertical 100mm diameter pipe, with a twin inlet connection at street level, an outlet valve at each landing and an automatic air release valve at the highest point.
Twin Inlet BreechingA twin inlet breeching is fitted with two instantaneous male connections with two non-return valves and a 25mm drain valve.
Four-way Inlet BreechingFour-way inlet breechings are used with a 150mm diameter rising pipe which serves two outlets on each floor. The breeching is fitted with four instantaneous male connections with four non-return valves and a 25mm drain valve. The connection onto the dry riser pipework is 150mm, usually flanged PN16 or BS Table D.
Specification Twin pumping-in breeching to BS 5041 Part 3 Horizontal or vertical with 25mm drain valve Inlets 2.5 male instantaneous to BS 336 with integral non-return valves and complete with blank caps and chains Outlet flanged either 100mm BS 4504 PN 16 or 4 BS Table D
Landing Gate ValvesProvided at each floor level to enable the Fire Brigade to make a connection for fighting fire on that floor level.
Dry Riser Inlet BoxesGenerally, boxes will be of painted steel with a door with a breakable glass panel and cylinder lock. The dimensions of the box must allow adequate space around the inlet breeching.
Dry Riser Outlet BoxesOutlet valves do not need to be housed in boxes. If boxes are used, they must comply with BS 5041 Part 4 and the dimensions must allow adequate space around the valve.
Specification Gate pattern landing outlet valve to BS 5041 Part 2 Outlet 65mm female instantaneous to BS 336, complete with blank plug and chain, padlock and strap and 150mm diameter handwheel Inlet can be flanged either 65mm BS 4504 PN16 or 2.5 BS Table D or screwed 2.5 BSP female
Specification Recessed dry riser inlet box to BS 5041 Part 5, 595 x 395 x 295mm deep, to suit a dry riser inlet breeching Box, door and frame from zintec steel, finished polyester powder paint red, with 230mm diameter hole through back for inlet connection Door complete with wired glass panel lettered DRY RISER INLET, lock and hinges For vertical or horizontal mounting
Globe Valve variations are available as oblique pattern, Bib-nose pattern or Right-angle pattern.
Dry Riser TestingDry riser systems should be tested to BS 5306 after installation and annually thereafter. The test procedure involves a full pressure water flow which simulates the actions that would be taken by the Fire Brigade in an emergency situation. The test results provide vital evidence that the dry riser system would be fully functional in an emergency. If any defects are found these can be promptly corrected after consultation with the person responsible for the buildings fire safety.
In line with our policy of continual development and improvement of products, we reserve the right to upgrade and amend product specification without prior notice.
Kidde Fire Protection Services 400 Dallow Road Luton Bedfordshire LU1 1UR UK
Tel +44 (0) 1582 413694 Fax +44 (0) 1582 402339 email email@example.com www.kiddefps.com