Legend Valve 355-187E 2-1/2" X 4-1/2" Black Nipple Trap

2-1/2" x 4-1/2" Schedule 40 Black Nipple

This Schedule 40 black nipple measures 2-1/2 inches by 4-1/2 inches and suits plumbing repairs or new installations. It connects threaded pipe sections in water, gas or air lines where a short, rigid length is required. The black finish indicates standard steel pipe material for general service.

Schedule 40 pressure rating and thread compatibility

Schedule 40 wall thickness determines the pressure rating, so the nipple must match the system design pressure and temperature limits. Both ends carry standard NPT threads; the installer must verify that mating fittings share the same thread standard and seal method. Chemical exposure or vibration may reduce service life beyond the base rating.

Threaded installation and common sealing issues

Installation requires cleaning threads, applying suitable tape or compound, and tightening to the recommended engagement without over-stressing the joint. Leaks usually come from insufficient sealant, cross-threading, or mixing incompatible thread sealants. The Proposition 65 notice warns that the product contains chemicals linked to cancer and reproductive harm, so wear gloves and wash hands after handling.