UPVC (unplasticized polyvinyl chloride) drainage pipe fitting molds offer several advantages, including:

1. Durability: UPVC is a highly durable and corrosion-resistant material that can withstand high temperatures and exposure to harsh chemicals, making it an ideal choice for drainage pipe fittings.

2. Cost-effective: UPVC is a cost-effective material compared to other materials such as metal or ceramic, which makes it an excellent choice for mass production.
   

3. Easy to mold: UPVC is a thermoplastic material that can be easily molded into any shape, making it highly versatile.

4. Lightweight: UPVC is a lightweight material that makes it easy to handle during transportation and installation.

5. Low maintenance: UPVC is a low-maintenance material that requires minimal upkeep and is easy to clean.

6. Environmentally friendly: UPVC is a recyclable material, making it an environmentally friendly option.

7. Resistant to chemicals: UPVC is highly resistant to chemicals and acids, making it suitable for use in harsh environments such as chemical plants and laboratories.

Overall, UPVC drainage pipe fitting molds offer several advantages, making them an excellent choice for a variety of drainage pipe applications.