• Fast install
• Clean jobsite
• Organized hardware
• Reusable

Choose Your Option:

• 1 Kit - Includes Gas Cap + solid brass hardware
•  2-Pack ⭐ Most Popular

The Gas Cap is a contractor-designed solution for sealing open toilet flanges during removal, rough-in, or reset—ideal for remodels, new construction, and floor replacements.

It blocks toxic sewer gas at the waste line and prevents tools, hardware, or debris from dropping into the drain while work is in progress.

Designed to fit securely into all standard 3 and 4 inch flange openings. The Gas Cap provides a positive seal without rags, tape, or temporary covers that fail or fall in.

The integrated tray keeps closet bolts, nuts, and washers contained and accessible during installation, reducing lost hardware and downtime.  

Specifications & Features
Temporary seal for open toilet flanges
Blocks sewer gas at the waste line
Prevents debris and tools from entering the drain
Integrated hardware tray for closet bolts and fasteners
Durable non-gloss ABS construction
Solid brass hardware included
Jobsite-durable vinyl warning label (not paper)

Made in the USA and trusted by contractors and homeowners alike.