White 25mm ABS Aspirating Pipe 90 Degree Elbow

FAQ

What is the purpose of the WHTGOI0250 elbow?

The WHTGOI0250 is a 90 degree elbow used to change the direction of pipe in aspirating smoke detection systems. It allows the pipe network to navigate around obstacles, corners and architectural features, enabling the system to be routed efficiently throughout the protected space. The elbow is essential for creating flexible pipe layouts whilst maintaining proper airflow characteristics.

Which pipe sizes is this elbow compatible with?

The WHTGOI0250 is designed specifically for 25mm diameter ABS pipe used in aspirating smoke detection systems. It connects sections of 25mm pipe at a 90 degree angle, allowing the network to change direction.

What is the difference between an elbow and a bend?

An elbow creates a sharper 90 degree turn in the pipe network and is typically used to divert pipework around obstructions where space is limited. A bend (also called a slow radius bend or sweeping bend) has a wider, more gradual curve and is preferred for optimal airflow as it creates less resistance. Bends are generally recommended for better system performance, whilst elbows are acceptable when space constraints require a tighter turn.

Which aspirating smoke detection systems can this elbow be used with?

The WHTGOI0250 is compatible with all major brands of low-pressure aspirating smoke detection systems, including VESDA, FAAST, ICAM and other leading ASD manufacturers. The elbow meets the industry standards required for these systems and is designed specifically for aspirating pipe networks.

What material is the elbow made from and why?

The elbow is manufactured from white ABS (Acrylonitrile Butadiene Styrene) plastic. ABS is chosen for its superior physical properties including excellent tensile strength, chemical resistance, impact toughness, weatherability and heat stability. The material is homogenous with good chemical resistance and high impact strength, performing reliably across temperatures from -40°C to 70°C and providing exceptional resistance to accidental damage.

How do I install this elbow?

The elbow is installed using ABS solvent cement welding. The process involves cutting the pipe ends squarely, removing all burrs, abrading both the pipe ends and the elbow socket interiors, cleaning with MEK cleaner, then applying ABS solvent cement before pushing the pipes fully into the elbow. When correctly made, these joints are stronger than the pipe itself. It is recommended that joints are left to cure for 24 hours wherever possible.

Why choose white elbows instead of red elbows?

Whilst red is the standard colour for aspirating smoke detection pipes and fittings to identify them as part of a fire detection system, white fittings are available to accommodate aesthetic requirements. White pipework and fittings are ideal for installations in commercial offices, retail environments, museums, prestigious buildings or any location where the visual appearance is important and red components may be too visually intrusive. The white elbow offers the same performance characteristics as red fittings whilst providing a more discreet appearance.

What standards does this elbow comply with?

The WHTGOI0250 is manufactured under a stringent quality control system approved to BS EN ISO 9001. The product is tested and certified to EN 54-20 (fire detection and fire alarm systems – aspirating smoke detectors) and EN 61386-1 standards, ensuring full compliance with UK and European fire safety regulations.

Can this elbow be used in harsh or extreme environments?

Yes, the ABS material provides excellent chemical resistance to a wide range of acids, alkalis and aggressive chemicals. The elbow maintains its impact strength and toughness across temperatures from -40°C to 70°C, making it suitable for demanding environments including cold stores, industrial facilities and outdoor applications. The elbow’s robust construction provides exceptional resistance to accidental damage during installation and operation.

How many elbows are needed for a typical installation?

The number of elbows required depends on the layout and complexity of the pipe network. Elbows are needed wherever the pipe must change direction by 90 degrees to navigate around obstacles or follow building architecture. The specific number should be determined during the system design phase using appropriate pipe network design software such as ASPIRE.

Are there any installation restrictions for elbows?

When designing the pipe network, it’s important to ensure that no sampling hole is positioned less than 100mm from an elbow or any other fitting. This ensures proper airflow and accurate smoke sampling. The system should be designed to minimise the use of sharp turns where possible, with slow radius bends preferred for better airflow characteristics.