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Dry & Wet Riser Systems - 2 / 2 Pages

Data Sheet File 11

Page 2 of 2

dry + wet riser systems

Dry riser system

An inlet breeching at ground level

provides the connection to the water

supply and can be installed in a

horizontal or vertical position. The

breeching has a 102mm (4 in)

screwed or flanged outlet and two

65mm (2V2¡n) instantaneous male

inlets fitted with non-return valves and

drain valve as standard. It is housed in

a dry riser box, normally recessed into

the external wall of the building. Each

draw-off point from the dry riser is

fitted with a landing valve, situated in a

recess or cabinet. Manufacture is in

accordance with BS 5041 Part 2.

The valves have instantaneous

couplings to BS 336, for connection

to the fire-fighting hose.

The head of the dry riser should be

fitted with an air release valve which

ventilates pipework as water is

pumped in and closes automatically

by water pressure.

Wet riser system

This system is permanently

connected to the water supply.

Therefore inlet breeching and air

release valves are not required. Each

draw-off point requires a landing

valve, with either a rubber metal

seated valve. They are

manufactured in accordance with BS

5041 Part 1. The instantaneous

female outlet is to BS 336. Inlet

connections may be screwed or

flanged as required.

A dry riser systerr

Air release valve

_anding valve

=langed tee piece

1 00mm bore main pipe

Top Floor

Dipe bracket

External wal

_anding valve

Dry riser landing valve box

First Floor

Landing valve /

anding valve box

Dry riser inlet box

with glazed door

Dry riser inlet breeching

25mm drain valve

Ground Floor



Part No. Product

10250 2 Way Dry Riser Inlet Breeching

10246 2.5" Oblique Pattern Hydrant

Valve (Flange: BS10 Table D)

11045 2.5" Oblique Pattern Hydrant

Valve (DN65 Flange: BS 4505 PN16)

10247 2.5" Horizontal Pattern Hydrant


Part No. Product

10251 4 Way Dry Riser Inlet Breeching

11016 2.5" Dry Riser Gate Valve

(inlet: 2.5" Female BSPT)

10254 2.5" Dry Riser Gate Valve

(Flange: BS 4505 PN16)

11165 2.5" Dry Riser Gate Valve

(Flange: BS10 Table D)

Tyco Fire Suppression & Building Products, Burlingham House, Hewett Road, Gapton Hall Industrial Estate,

Great Yarmouth, Norfolk NR31 ONN, UK. Tel: +44 (0)1493 417600 Fax: +44 (0)1493 417700

E-mail: macron-info@tycoint.com Web: www.macron-safety.com


Fire Suppression

& Building Products

| Datasheet Ret | MDF11 | A1 ~|

Dry & Wet Riser Systems
  1. P. 1

    Data Sheet File 11 dry + wet riser systems Page 1 of 2 Dry/wet Macron manufactures and supplies, for installation by others,...
  2. P. 2

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