If you’re shopping for a new toilet, one common question is: does a new toilet come with a fill valve? The fill valve is a critical part of the toilet’s flushing system. It controls how the tank refills after every flush, ensuring the right amount of water is ready for the next use. In this guide, we’ll explain whether new toilets include fill valves, what type you can expect, and when you may want to upgrade to a better replacement valve.
Do New Toilets Include a Fill Valve?
Yes. Almost all new toilets sold by major brands—such as Kohler, Toto, American Standard, and Mansfield—come with a fill valve pre-installed in the tank. Since the toilet cannot function without it, manufacturers ship their toilets with this part included. You generally don’t need to buy a separate fill valve when purchasing a complete toilet.
There are a few exceptions worth noting:
- Tank-only replacements: If you purchase just a toilet tank as a replacement, it may or may not include a fill valve.
- Budget or basic models: Some entry-level toilets include standard, noisier fill valves rather than premium versions.
- Commercial toilets: Certain commercial systems use flushometers or other external valves, which don’t rely on a traditional fill valve.
What Type of Fill Valves Do New Toilets Come With?
Each brand generally provides its own fill valve design:
- Kohler: Often includes Silent Fill valves designed for quieter refills.
- Toto: Uses OEM adjustable fill valves engineered for Toto’s flushing systems.
- American Standard: Includes durable, adjustable fill valves for consistent tank refills.
- Mansfield: Ships with OEM parts that fit Mansfield’s unique tank configurations.
Should You Upgrade the Fill Valve in a New Toilet?
While new toilets do come with a fill valve, some homeowners upgrade them right away for better performance. Reasons to upgrade include:
- Quieter operation: Premium fill valves, like Korky QuietFill or Kohler Silent Fill, reduce noise significantly.
- Durability: Brass-shank or high-quality composite models last longer than standard plastic versions.
- Adjustability: Some universal valves offer a wider adjustment range for custom water levels.
- Improved efficiency: Upgraded valves may save water and provide smoother performance.
Best Replacement Fill Valves for New Toilets
If you want to upgrade the stock valve in your new toilet, here are some top-rated replacements:
Fluidmaster 400A Universal Fill Valve
Best Budget Option
- Adjustable height: 8″–14″
- Universal fit for most brands
- Simple DIY installation
Pros: Affordable, widely available, proven reliability
Cons: Louder than premium models
Korky 528MP QuietFill Platinum Fill Valve
Best for Quiet Operation
- Adjustable height: 7.75″–13.5″
- QuietFill technology for near-silent refills
- Made in the USA with premium materials
Pros: Very quiet, durable, widely compatible
Cons: Slightly more expensive than budget options
Kohler GP1083167 Silent Fill Valve Kit
Best OEM Upgrade
- Designed for Kohler toilets, including Class Five systems
- Silent-fill technology for quiet refilling
- Adjustable for multiple tank sizes
Pros: OEM fit, whisper-quiet, reliable performance
Cons: Higher price than universal options
Comparison Table
| Product | Best For | Adjustable Height | Noise Level | Price Link |
|---|---|---|---|---|
| Fluidmaster 400A | Budget replacement | 8″–14″ | Moderate | View Price |
| Korky 528MP | Quiet performance | 7.75″–13.5″ | Very quiet | View Price |
| Kohler GP1083167 | OEM upgrade | 7.75″–13.5″ | Silent-fill, very quiet | View Price |
FAQ
Do all new toilets come with a fill valve?
Yes, nearly all complete toilet packages include a fill valve. Only replacement tanks or special commercial models may not include one.
Can I replace the fill valve in a brand-new toilet?
Yes. If you want quieter operation or higher-quality materials, you can upgrade the valve immediately.
Are OEM fill valves better than universal ones?
OEM valves guarantee a perfect fit for the brand, while universal models are affordable and fit most toilets.
How long does a fill valve last?
On average, 5–7 years. Premium models may last longer, especially in homes with good water quality.
What’s the quietest option available?
The Kohler Silent Fill and Korky QuietFill are among the quietest fill valves on the market.
Conclusion & Call-to-Action
So, does a new toilet come with a fill valve? Yes—it almost always does. However, the included valve may be a basic model. If you want a quieter, more durable, or adjustable option, consider upgrading. The Fluidmaster 400A is a reliable budget choice, the Korky 528MP offers whisper-quiet refills, and the Kohler GP1083167 provides perfect OEM performance for Kohler toilets.
Order your replacement fill valve today and enjoy a toilet that performs quietly and efficiently for years to come.