110mm(4′) black solvent weld fittings are plumbing components designed to connect or join pipes in a system using a solvent-based adhesive. These fittings are made from durable, high-density polyethylene (HDPE) or polyvinyl chloride (PVC) materials and are often used for waste, drainage, or venting applications. The black color typically indicates they are intended for use in specific environments, such as underground or outdoor installations, as they provide UV resistance, which helps to prevent degradation when exposed to sunlight.

Here’s a breakdown of the key details:

1. Material:

• PVC or HDPE: Both materials resist corrosion, chemical attack, and impact, making them ideal for waste and drainage systems.
• UV Resistance: The black color helps prevent UV degradation, extending the lifespan of the fittings when exposed to sunlight or outdoor conditions.

2. Size:

• The 110mm refers to the nominal external diameter of the pipe the fitting is designed to connect, which is standard for many domestic and commercial drainage systems.
• Fittings come in various shapes such as elbows, tees, couplings, and reducers, all sized for a 110mm pipe.

3. Solvent Weld Connection:

• Solvent welding involves applying a special solvent adhesive to the fitting and pipe, which chemically bonds the two components together. This creates a strong, leak-proof joint that is resistant to many chemicals and temperatures.
• The solvent weld method is commonly used in PVC and HDPE pipe systems because it provides a reliable, permanent connection.

4. Applications:

• Waste and drainage systems: Ideal for wastewater, rainwater, and soil drainage systems where durability and resistance to chemicals and weathering are important.
• Venting systems: Used in venting pipes to allow gases or air to flow without leaks or contamination.
• Outdoor Installations: Offers UV protection, these fittings are often chosen for outdoor plumbing systems to ensure long-term performance.

5. Types of Fittings:

• Elbows: These are used to change the direction of the pipe, typically at 45° or 90° angles.
• Tees and Y-fittings: Used to create branch connections or redirects from the main pipeline.
• Couplings: For connecting two lengths of pipe in a straight line.
• Reducers: To connect pipes of different diameters.
• Access fittings: These include inspection points or cleanouts to allow maintenance access.

6. Advantages:

• Durability: The fittings resist cracking, impact, and corrosion, which makes them suitable for harsh conditions.
• Ease of installation: Solvent welding creates a simple, fast, and permanent connection, reducing the risk of leaks and system failures.
• Chemical Resistance: These fittings can handle various chemicals and are often used in industrial or commercial environments.

7. Standards and Regulations:

• Most 110mm black solvent weld fittings adhere to industry standards for pressure and performance, including those set by organizations like British Standards (BS), International Standards Organization (ISO), and the Water Regulations Advisory Scheme (WRAS) in the UK.

Overall, these fittings are widely used in domestic, commercial, and industrial plumbing systems for reliable, durable connections above ground.