KOHLER Silent Fill Toilet Valve Kit GP1138930 — Adjustable, Quiet Fill Inserts

Experience a quieter, more efficient toilet refill with a genuine KOHLER part

Replace the standard fill valve with the KOHLER Silent Fill Valve Kit GP1138930 and enjoy a refill process that feels calmer and more controlled. Designed by KOHLER engineers, this genuine part aims to preserve original performance while helping your toilet refill smoothly and consistently over time.

Two standout benefits pair to offer practical improvements in daily use:

• Silent Fill Technology: The refill happens with less noise, delivering a more peaceful bathroom experience, especially in early mornings or late nights.
• Adjustable Fill-rate Inserts: A set of inserts lets you tailor the refill speed and water usage to your toilet’s needs, potentially promoting efficiency without sacrificing performance.

Compatibility and fit

• Compatibility: Designed for Kohler Class 5 toilets. Confirm your shank color to determine the correct part.
• Shank color guide: Grey shank = this GP1138930 part; Black shank = GP1083167.
• Cap color: Cap colors may vary between units; this does not affect core performance.

Genuine KOHLER Parts are created to maintain the original product performance and support long-term reliability. By choosing authentic components, you may help preserve warranty coverage and ensure a consistent refill experience across use cycles.

Practical, everyday use

In real-life scenarios, a quieter refill can contribute to a more relaxed morning routine, a calmer bathroom ambience, and fewer disturbances in households with shared spaces. The adjustable inserts offer a way to fine-tune refill timing and water flow to fit different toilet models and household preferences—without making exaggerated claims about outcomes.

Easy installation tips

• Verify compatibility with your Class 5 Kohler toilet before installation.
• Handle the valve components with care and avoid abrasive cleaners that could damage surfaces.
• Follow standard replacement steps and recheck seal integrity after installation.

Choosing a genuine part supports performance consistency and product longevity. If you’re updating an older toilet or seeking a quieter refill experience, this valve kit offers a practical, non-intrusive option to consider.