4 inch ABS PVC Schedule 40 Test Cap Insert

4" ABS/PVC Schedule 40 Test Cap Insert – For Temporary Sealing and System Testing

The 4-inch ABS/PVC Schedule 40 Test Cap Insert is a solvent-insert cap used in non-pressurized drain, waste, and vent (DWV) systems. It is designed to temporarily seal the end of a Schedule 40 pipe during rough-in inspections and pressure or water testing procedures. Manufactured from impact-resistant ABS or compatible PVC materials, this fitting provides a secure fit without requiring solvent cement bonding, allowing easy removal after testing.

This cap meets the dimensional requirements of ASTM D2661 for ABS and ASTM D2665 for PVC systems and can be used in vertical or horizontal configurations where temporary closure is required. The tight friction fit accommodates system pressure testing in accordance with local plumbing code provisions.

Key Features and Benefits

• ✅ Application: Used to seal open ends of Schedule 40 DWV piping during system testing or prior to permanent installation.
• ✅ Material Compatibility: Suitable for use with both ABS and PVC Schedule 40 pipe systems depending on construction material.
• ✅ Pressure Testing: Engineered to hold during standard low-pressure air or water testing per code guidelines (typically 5–15 psi).
• ✅ Installation Method: Insert fits into plain end pipe without adhesive, simplifying removal post-test phase.
• ✅ Durability: Resistant to mechanical impact and deformation during handling and testing.

Technical Specifications

• Nominal Size: 4 inch
• Fitting Type: Test Cap Insert
• Material: ABS or PVC, depending on model variant
• Connection: Insert-fit (non-solvent, removable)
• Compliance: Conforms to applicable sections of ASTM D2661 (ABS) and D2665 (PVC); intended for DWV system use

Installation Notes

Ensure pipe ends are clean and free of debris prior to inserting the test cap. No solvent cement is required. For systems requiring hydrostatic or pneumatic testing, refer to local codes for maximum allowable pressure and duration. After testing, the cap can be manually removed or cut out as needed before final pipe connection is completed.

Common Applications

This fitting is typically used in rough-in inspections of DWV systems in residential, commercial, and institutional buildings. It is suited for temporarily sealing stacks, cleanouts, or branch lines prior to fixture installation and system finalization.

Standards and Limitations

This cap is designed for use in gravity-fed DWV systems only and is not intended for pressurized potable water or gas piping. Always verify compatibility with pipe material and testing procedures approved by the local authority having jurisdiction (AHJ).