This PVC Union Fitting with 1″ MNPT x 1″ MNPT connections is designed for
whole house water filtration systems and plumbing lines that use 1″ port connections.
It is a common service part for whole house filters with 1″ MNPT ports, allowing you to
connect, disconnect, and service the system more easily.

A union fitting is ideal when you want a secure threaded connection that can be taken apart later for
maintenance, filter changes, or upgrades—without cutting pipe. The union nut allows quick removal of the
filter system or component while keeping the plumbing alignment intact.

Key Features

• Connection Type: 1″ MNPT x 1″ MNPT (male threads on both ends)
• Application: Designed for 1″ port whole house water filters and plumbing lines
• Service-friendly: Union design allows easy disconnection for maintenance
• Material: Durable PVC construction (corrosion-resistant)
• Quantity: 1 union fitting
• Max pressure: 120 PSI

Typical Uses

• Whole house water filtration systems with 1″ MNPT ports
• Inline plumbing connections where future disassembly is needed
• System upgrades, replacements, and maintenance access

Installation Notes

• Use PTFE (Teflon) tape or thread sealant on MNPT connections for a proper seal.
• Do not overtighten—hand-tighten first, then snug with a wrench as needed.
• After installation, slowly pressurize the line and check for leaks.
• Comes with double O-rings for a more secure connection.

Note: Please confirm your system uses 1″ MNPT (male NPT) thread compatibility
before ordering. This listing is for the union fitting only.