Waterless Trap Seal 6 in for 145-155 mm Pipes - Odor Control

In this review the Waterless Trap Seal 6 in model is examined for installers and homeowners needing a simple, effective way to stop sewer gases without relying on standing water. The bottom line: this unit is best for drains with pipe diameters between 145 and 155 mm that require a compact, sturdy barrier; its biggest selling point is the reliable silicone skirt and 6 in connection that together provide consistent odor protection with straightforward installation.

Key Features

• Fits 145-155 mm pipes: The model is sized specifically to fit pipes in the 145-155 mm range so users can expect a snug fit and reliable sealing performance.
• 6 in connection: The 6 in connection accommodates standard large-diameter drains and gives the product the flow capacity needed for busy installations.
• 51 mm height: With a 51 mm profile the unit fits a variety of installations while offering sufficient internal volume to handle substantial drainage without backup in most scenarios.
• Simple installation: The design requires recessing the unit 2-4 in into the drain and seating the silicone skirt with a screwdriver, which keeps installation quick and low-skill.
• Eco-friendly design: Developed by a company with plumbing and water conservation patents, the unit replaces water-based traps to reduce water use and improve long-term efficiency.

Who It's For

The Waterless Trap Seal 6 in is aimed at contractors, facility managers, and homeowners who need an odor barrier for larger drains in bathrooms, utility rooms, or commercial spaces where a waterless solution is preferred. Its fit for 145-155 mm pipes and 6 in connection make it especially useful when retrofitting existing larger drains.

It is less suited to very small-diameter drains or situations where the installer cannot recess the unit 2-4 in as instructed, since improper seating of the silicone skirt can affect drainage performance. Users expecting instant perfect drainage in all shower floors should note occasional reports of slower drainage in certain installations.

Pros & Cons

Pros

• Effective odor control thanks to a well-seated silicone skirt and waterless seal design.
• Sturdy build and correct sizing give a secure fit for 145-155 mm drain pipes.
• Easy installation that requires only recessing 2-4 in and seating the skirt with a screwdriver.

Cons

• Some users report occasional water accumulation in specific shower setups, so performance can vary with local drain slope and flow.

Specifications

Our Verdict

The Waterless Trap Seal 6 in is a practical, cost-effective option for larger drains where odor control and water conservation matter. Installers will appreciate the clear recessing instruction and simple seating method, and most users will find the fit and build quality deliver good value, though those with unusually low drain slopes should confirm drainage behavior before committing.

Frequently Asked Questions

Will this fit my drain?
It fits pipes measuring 145-155 mm across; measure the internal diameter to confirm compatibility.

How deep must it be recessed?
Recess the unit 2-4 in into the drain and push a screwdriver through to seat the silicone skirt fully.

Does it stop odors without water?
Yes, the waterless silicone skirt design provides an effective barrier to sewer gases when correctly installed.