What is a riser pipe?

A riser pipe is a durable metal or plastic pipe which extends from the water supply line to the water heater and up through the walls to deliver water, steam, or gas to the lavatories, kitchens, and plumbing fixtures on the upper floors of a building and branch to up to two higher levels.

What is a dry riser system?

A dry riser system is an empty pipe running up the inside of a building which can be connected to by firefighters and used as a pressurised water system.

What is the function of dry riser?

A dry riser is a normally empty pipe that can be externally connected by firefighters to a pressurised water source. It is a vertical pipe intended to distribute water to multiple levels of a building or structure as a component of the fire suppression systems.

What is the difference between dry riser and wet riser?

Dry riser: a system of valves and pipe work which enables the fire service to pump water onto upper floors of a building. Wet riser: a system of valves and pipe work which is kept permanently charged with water, generally utilising pumps and tanks.

How many types of risers are there?

two kinds
There are essentially two kinds of risers, namely rigid risers and flexible risers. A hybrid riser is the combination of these two.

What is a riser in construction?

+ Follow. What is a Riser? Vertical riser is a term for anything that rises vertically through a building, specifically it refers to vertical riser ducts, pipes or conduits used to deliver fluid, gas, or electrical signals or power upward.

Why is it called a dry riser?

The reason it is called a ‘dry’ riser is that there is no water in the pipe; the pipe is filled with compressed air which prevents water entering the pipe unless a fire activates one of the sprinklers.

Do I need a dry riser?

When Do You Need Dry Risers. Dry risers need to be installed in buildings where the floor is between 18 & 60 meters above ground level. This is roughly equivalent to buildings of more than 6 stories and less than 17.

How do you test a dry riser?

Annual Dry Riser Testing This includes a hydraulic pressure test (or wet pressure test). Using a fire service approved hose and water pump the system is filled with water to a pressure of 12 bar (175psi) for a minimum of 15 minutes. This tests the system for any leaks.

When should a dry riser be installed?

Dry risers should be installed in buildings where the floor is between 11 & 50 meters above ground level. This is roughly equivalent to buildings of between 3 – 17 stories; Operating pressure of 12 bar; The run of horizontal connecting pipe is a maximum of 18 m in length.

What are risers in construction?

“Vertical riser” is a term for anything that rises vertically through a building, although it normally specifically refers to vertical riser ducts, pipes or conduits. Stairs and elevators are also types of vertical risers but it’s normal to refer to them by name.