Fernco qc-104 4 Inch Qwik Cap Pipe End Cap

Product Description

The FERNCO qc-104 is a flexible PVC pipe end cap designed for quick, reusable sealing of pipe ends, clean-outs, and test applications. Made from durable flexible PVC, this Qwik Cap installs without tools and can be removed and reinstalled as needed, making it a practical choice for pressure testing and temporary capping during inspection or construction. Plumbers and drain technicians use this cap when testing DWV systems or sealing open pipe ends during phased construction. The 4-inch size fits standard 4-inch pipe ends in a range of piping materials.

The qc-104 is suited for both residential and light commercial plumbing applications. It sees common use during rough-in inspections, clean-out capping, and hydrostatic or air pressure testing of drain, waste, and vent systems. Its flexible PVC construction allows it to conform to pipe ends and seat securely without the need for adhesives, threads, or mechanical fasteners. Both above-ground and below-ground installations are supported by the material construction.

Key Features

• Reusable design allows repeated installation and removal without degradation
• Flexible PVC construction seats securely on pipe ends without adhesives or threading
• Rated for both above-ground and underground use
• Suitable for pipe end capping, clean-out testing, and pressure test applications
• 4-inch nominal size fits standard 4-inch pipe ends

Compatibility

Designed as an OEM-style replacement and standard fit for 4-inch nominal pipe ends in residential and commercial DWV plumbing systems.

Installation Notes

Installation is performed by licensed plumbers or qualified pipe technicians. Shut off water supply and relieve any system pressure before placing or removing the cap during active system work. No adhesives, solvents, or special tools are required for installation. Follow local plumbing code requirements, including IPC guidelines, when performing pressure or leak-down tests on drain, waste, and vent systems.

Technical Specifications

• Pipe Size: 4 inches
• Material: Flexible PVC
• Application: Pipe end capping, clean-out testing, pressure testing
• Installation Type: Above-ground or underground
• Reusable: Yes

Standard Information

• Brand: FERNCO
• Manufacturer Part Number: qc-104