If you’re shopping for a new toilet, you may be wondering: do new toilets come with a fill valve? The fill valve is one of the most important parts of the toilet—it controls the water refilling process after each flush. Without it, your toilet tank wouldn’t function properly. In this guide, we’ll explain whether new toilets include fill valves, what type of valves they typically come with, and when you might want to upgrade to a better model.
Do New Toilets Come with a Fill Valve?
Yes, almost all new toilets sold by major manufacturers—such as Kohler, Toto, American Standard, and Mansfield—come with a fill valve pre-installed in the tank. Since the fill valve is essential for operation, toilet makers include it as part of the tank’s flushing system. You won’t need to buy one separately when purchasing a complete toilet.
However, there are a few exceptions:
- Tank-only purchases: If you buy a replacement tank without the full toilet, it may or may not include internal parts like the fill valve and flush valve.
- DIY or budget models: Some low-cost toilets ship with basic fill valves that may be noisier or less durable than premium options.
- Commercial or specialty toilets: Certain commercial toilets come with separate valve systems, depending on their design.
What Type of Fill Valves Do New Toilets Include?
The fill valve that comes with a new toilet is usually matched to that brand’s design. Examples include:
- Kohler: Often ships with Silent Fill valves designed for quiet operation.
- Toto: Uses proprietary adjustable fill valves optimized for Toto’s flushing systems.
- American Standard: Includes durable OEM fill valves with adjustable water levels.
- Mansfield: Typically uses OEM parts but may also be compatible with universal replacements.
Should You Upgrade the Fill Valve in a New Toilet?
Even though new toilets come with fill valves, some homeowners choose to upgrade them right away. Reasons include:
- Noise reduction: Premium valves like the Korky QuietFill or Kohler Silent Fill are much quieter than budget versions.
- Durability: Brass-shank or high-quality composite valves last longer than basic plastic models.
- Adjustability: Universal valves often have better adjustment ranges for custom water levels.
- Compatibility: If your new toilet doesn’t flush efficiently, upgrading the fill valve may improve performance.
Best Replacement Fill Valves for New Toilets
If you want a quieter, longer-lasting upgrade for your new toilet, here are some top-rated fill valves:
Fluidmaster 400A Universal Fill Valve
Best Budget
- Adjustable height: 8″–14″
- Universal fit for most brands
- Easy DIY installation
Pros: Affordable, reliable, widely used
Cons: Louder than premium models
Korky 528MP QuietFill Platinum Fill Valve
Best Quiet Option
- Adjustable height: 7.75″–13.5″
- QuietFill technology for near-silent operation
- Made with long-lasting materials
Pros: Very quiet, durable, widely compatible
Cons: Slightly higher cost
Kohler GP1083167 Silent Fill Valve Kit
Best OEM Replacement
- OEM part for Kohler toilets, including Class Five models
- Silent-fill design reduces noise
- Adjustable height for proper water levels
Pros: Perfect OEM fit, quiet, efficient
Cons: Costs more than universal valves
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 replacement | 7.75″–13.5″ | Silent-fill, very quiet | View Price |
FAQ
Do all new toilets come with a fill valve?
Yes, nearly all new toilets ship with a fill valve installed. Only replacement tanks or commercial models may not include one.
Can I replace the fill valve in a brand-new toilet?
Yes. If you want quieter operation or improved durability, you can replace the stock valve with a premium one right away.
Are OEM fill valves better than universal ones?
OEM valves guarantee the best fit and performance for that brand, while universal models are more affordable and widely compatible.
How long do new fill valves last?
Typically 5–7 years, depending on water quality and usage. Premium models may last longer.
What’s the quietest fill valve available?
The Kohler Silent Fill and Korky QuietFill are among the quietest options, perfect for bathrooms near bedrooms.
Conclusion & Call-to-Action
So, do new toilets come with a fill valve? Yes, they do—but the included valve may be a basic version. For homeowners who value quietness, durability, and efficiency, upgrading to a premium fill valve is often worth it. The Fluidmaster 400A is a great all-around budget choice, the Korky 528MP offers ultra-quiet refills, and the Kohler GP1083167 provides perfect OEM performance for Kohler models.
Order your replacement fill valve today and enjoy a quiet, efficient toilet that performs at its best.