Aerator Fitting
Aerator Fitting for Single Stack Drainage Systems
Simplify Your Building’s Drainage with One Pipeline Instead of Three
A conventional drainage setup needs three separate pipe stacks: one for wastewater, one for soil discharge, and a third dedicated purely to venting, which stops trapped air pressure from breaking trap seals (a problem known as syphonage). That’s three vertical runs eating into shaft space on every floor.
The Ajay Aerator Fitting removes that redundancy. It’s engineered to combine drainage and venting into a single stack, so your building gets the same protection against syphonage and odor backflow without running a dedicated vent line. For architects and builders working on high-rise or space-constrained projects, this translates directly into more usable shaft area and a simpler pipe routing plan on every floor.
Single Stack System vs Three Stack System

| Three Stack System | Ajay Single Stack (Aerator) | |
|---|---|---|
| Pipe runs required | 3 (waste, soil, vent) | 1 |
| Shaft space used | High | Significantly reduced |
| Installation complexity | Higher, more joints, more coordination | Lower, fewer connections, faster fit-out |
| Best suited for | Low-rise, low space constraints | High-rise & space-constrained buildings |
Why Builders and Plumbers Choose the Ajay Drainline Aerator
- One stack does the job of three — waste, soil, and venting run through a single pipeline
- Frees up shaft space — a real advantage on floor plans where every inch of duct area counts
- Faster installation — fewer pipe runs mean fewer joints and less time on-site
- Connects up to 3 toilets to a single aerator fitting, cutting material and labor needs
- Lower overall project cost — less piping, less labor, less shaft construction
- Compliant with the Indian National Building Code, so it’s specification-ready for RERA and municipal approval
Where It's Used
The Aerator Fitting is best suited for high-rise residential and commercial buildings, space-constrained layouts, and any project where shaft real estate is at a premium, including redevelopment and retrofit projects where adding a third vent stack isn't practical.
Frequently Asked Questions
1. What is an aerator fitting used for in drainage systems?
It allows a building's soil and waste lines to be vented through the same stack, removing the need for a separate dedicated vent pipe.
2. How is a single stack system different from a traditional three stack system?
A three stack system runs separate pipelines for wastewater, soil discharge, and venting. A single stack system with an aerator fitting combines all three functions into one pipeline, reducing shaft space and installation time.
3. Does a single stack system meet Indian plumbing code requirements?
Yes. Ajay's Drainline Aerator is designed to meet the venting and drainage requirements set out in the Indian National Building Code.
4. How many toilets can one Ajay Aerator Fitting support?
A single aerator fitting can connect up to three toilets, reducing the amount of piping and labor needed per floor.
5. Is the single stack system suitable for high-rise buildings?
Yes, it's particularly well-suited to high-rises, where saving shaft space across multiple floors adds up to significant cost and area savings, along with faster installation.
Get the Right Aerator Fitting for Your Project
Talk to our technical team about specifying the Ajay Drainline Aerator for your next project.


