VALLVATER 3-Inch Flush Valve Kit with Gasket & Bolts — Compatible with American Standard 738921-100.0070A Two-Piece Toilets

Overview

The VALLVATER 3-inch Flush Valve Replacement Kit offers a practical solution for restoring reliable flush performance in standard two-piece toilets. Built to fit 3-inch valve openings, it is compatible with American Standard 738921-100.0070A and many similar models. The kit bundles a flush valve, bolts, and a 3-inch tank-to-bowl gasket, delivering a ready-to-install repair that helps you reclaim a tight seal and quiet operation in daily bathroom use.

In real-world terms, a well-sealed valve can contribute to smoother flush cycles and reduced water waste when seals wear down. Before you install, verify your tank opening to ensure a proper fit. The compatible range is 70mm to 105mm (about 3 inches). Using the right size supports dependable performance and minimizes the chance of leaks over time.

What sets it apart

This kit brings together essential parts in one package, designed for quick DIY repairs. The components are chosen to work together, so you can tackle a common leak source without hunting for separate pieces. A sturdy valve and gasket pair, coupled with durable mounting hardware, help you refresh the flushing system with confidence.

What’s included

• 1 x toilet tank flush valve
• 2 x toilet tank bolts
• 1 x 3-inch tank-to-bowl gasket

Key benefits

• Helps reduce leaks by replacing worn valve and gasket
• Includes an adjustable overflow tube for a custom fit
• Durable construction from ABS plastic and rubber that resists warping
• Perma-Fit silicone seal is chemical resistant and designed for long-lasting performance
• Designed for quick, straightforward installation to minimize downtime

Installation and care

This kit is built for a fast, DIY-friendly install. Turn off the water, flush to empty the tank, and follow the included gasket and valve assembly steps. Expect a tighter seal and steadier flush as you complete the repair. Regular checks can help maintain optimal performance over time.

Compatibility and notes

Not compatible with one-piece toilets. Suitable for split-tank fixtures with a 3-inch opening (70–105 mm). Verify your model and brands to ensure a match before purchasing.