Midland Industries 21178 Mushroom Vent Cap 2in Fpt 150lb

Product Description

The MIDLAND INDUSTRIES 21178 is a galvanized cast iron mushroom vent cap designed to terminate open pipe ends in venting and drainage systems while keeping out debris, pests, and weather. The cap threads onto a 2-inch female pipe thread (FPT) connection using a 2-11/2 thread engagement and carries a 150 lb pressure class rating. Its domed mushroom profile sheds water and prevents backflow of contaminants into the pipe. Rated for service from -20 degrees F to 350 degrees F, it suits a wide range of installation environments. Licensed plumbers and pipefitters install this fitting as a standard protective terminal on galvanized malleable iron pipe systems.

This vent cap is used on galvanized 150 lb malleable iron pipe assemblies in residential and light commercial applications. Typical installations include vent pipe terminations on water heater flues, sewer vent stacks, and general-purpose piping where an open pipe end requires protection. The FPT connection threads directly onto a standard male-threaded pipe stub without additional adapters or fittings.

Key Features

• 2-inch FPT connection with 2-11/2 thread form for standard galvanized pipe engagement
• 150 lb pressure class construction rated for galvanized malleable iron piping systems
• Galvanized finish provides corrosion resistance for interior and sheltered exterior installations
• Cast iron body withstands service temperatures from -20 degrees F to 350 degrees F
• Mushroom dome profile sheds water and blocks debris at open pipe terminations
• Compact profile at 1.55 inches height and 3.75 inches diameter for tight installation spaces

Compatibility

Designed as an OEM-style replacement and standard fitting for 2-inch galvanized 150 lb malleable iron pipe systems.

Installation Notes

Installation is performed by a licensed plumber or pipefitter in accordance with applicable IPC and IFGC code requirements. Shut off the associated system and depressurize the line before threading on the cap. Apply appropriate thread sealant or PTFE tape to the male pipe threads before engagement. Do not over-torque; hand-tighten and finish with a pipe wrench to achieve a leak-free seal without stressing the cast iron body.