

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The COPPERFIT 1A1548 is a 4-inch threaded ABS DWV plug designed to cap off drain, waste, and vent piping during pressure testing, system shutoff, or end-of-line termination. Molded from ABS (acrylonitrile butadiene styrene) plastic, this plug threads directly into female-threaded ABS fittings to create a secure, leak-resistant seal. At 0.26 pounds, it is lightweight and easy to handle in tight spaces. Plumbers and pipefitters use this fitting wherever a reliable, code-appropriate plug is needed in a residential or light commercial DWV system.
This plug is suited for residential and light commercial drain, waste, and vent applications where ABS piping is installed. Common uses include capping branch lines during rough-in inspections, isolating sections of a system for leak testing, and permanently closing unused ports. It is compatible with standard 4-inch female NPT or ABS threaded fittings in gravity-flow DWV configurations.
Designed as an OEM-style replacement and standard fit for 4-inch threaded ABS DWV fittings in residential and light commercial drain, waste, and vent piping systems.
Installation is typically performed by a licensed plumber in accordance with local plumbing codes and the International Plumbing Code (IPC). Before installing or removing this plug, ensure the system is depressurized and flow is isolated at the appropriate shutoff point. Use pipe thread sealant or PTFE tape on the threads to ensure a proper seal. Do not overtighten, as ABS threads can crack under excessive torque.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!