Description

The 4″ Threaded Plug is a durable sealing fitting designed for FRP (Fibreglass Reinforced Plastic) pressure vessels used in residential, commercial, and industrial water treatment systems. It is used to securely seal the 4″ threaded opening on an FRP vessel when a control valve, mount head, or other fitting is not required.

Manufactured from high-quality, corrosion-resistant plastic, the plug provides a reliable, watertight seal and is suitable for potable water applications. It is commonly used during vessel storage, transportation, pressure testing, or in simple filtration systems where the vessel opening needs to remain permanently sealed.

Features:

• Designed for 4″ FRP pressure vessels.
• Durable ABS or reinforced polypropylene construction.
• Corrosion and chemical resistant.
• Food-grade materials suitable for potable water.
• Provides a secure, leak-proof seal.
• Easy installation and removal.
• Compatible with standard 4″ vessel openings.
• Long service life.
• Suitable for residential, commercial, and industrial water treatment systems.

Specifications:

• Product: 4″ Threaded Plug.
• Material: ABS Plastic or Reinforced Polypropylene.
• Thread Size: 4″ Male Thread.
• Seal Type: EPDM Gasket or O-Ring.
• Food Grade: Yes.
• Application: FRP Pressure Vessels.

Applications:

• FRP pressure vessels.
• Water treatment systems.
• Water softeners.
• Activated carbon filters.
• Multimedia filters.
• Sand filtration systems.
• Pressure testing.
• Vessel storage and transportation.
• Temporary or permanent vessel sealing.
• Industrial and commercial filtration systems.

Why Choose the 4″ Threaded Plug?

• Provides a reliable, watertight seal for 4″ FRP pressure vessels.
• Manufactured from durable, corrosion-resistant materials for long-term performance.
• Food-grade construction makes it suitable for potable water applications.
• Easy to install and remove for maintenance or storage.
• Built-in EPDM gasket or O-ring ensures a secure seal without additional sealing compounds in most applications.
• Suitable for residential, commercial, agricultural, and industrial water treatment systems.
• Ideal for sealing unused vessel openings during storage, transport, testing, or permanent installations.