Home/Products/2 Inch Dual Flush Valve Replacement Kit for One-Piece Dual Flush Toilets

Senshare

2 Inch Dual Flush Valve Replacement Kit for One-Piece Dual Flush Toilets

Name: 2 Inch Dual Flush Valve Replacement Kit for One-Piece Dual Flush Toilets
Brand: Senshare
SKU: B0H25RKC3N

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9.6/10

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Highlights

ONLY FITS 2-INCH One-PIECE DUAL FLUSH TOILETS – Designed for one-piece dual flush toilets with a top push button only and not compatible with 2-piece toilets. Fits flush valve openings from 2.5" to 3" and tank lid button hole diameters from 1.9" to 2.2". The telescopic overflow tube adjusts from 8.6" to 12" to better match different tank profiles. Compatible with select models from brands such as Glacier Bay, AquaSource, Project Source, HOROW, DEERVALLEY, TOTO, Kohler, and Water Ridge when dimensions and structure match. Please confirm your toilet type and measurements before ordering
FIX LEAKS, RUNNING WATER, WEAK FLUSHES & BROKEN BUTTON ISSUES – This dual flush valve replacement kit is designed to solve common toilet problems caused by worn internal parts. It helps stop leaks into the bowl, eliminate constant running water and ghost flushing, restore stronger and more consistent flush performance, and fix misaligned or unresponsive flush buttons. With a new flush valve, fill valve, and sealing components working together, it restores your toilet to more reliable, like-new operation without replacing the whole system
ADJUSTABLE HEIGHT DESIGN FOR FLEXIBLE FIT – Built to fit more One-piece toilet tanks, this toilet tank replacement kit features an adjustable fill valve that extends from 8" to 13" and a telescopic overflow tube that adjusts from 8.6" to 12" / 22–30.5cm . Unlike fixed overflow tubes that may require cutting when too long, the no-cut telescopic design helps reduce wrong cuts, fit issues, and installation frustration while supporting a proper water level for stable flushing performance
DUAL FLUSH WATER-SAVING UPGRADE FOR OLDER 1-PIECE DUAL FLUSH TOILETS – Use half flush for liquids and full flush for solids to improve water efficiency without sacrificing reliable flushing performance. Half flush uses about 0.8–1.0 GPF, while full flush uses about 1.6 GPF, making this a practical water-saving upgrade for older 1-piece dual flush toilets and households looking to reduce water waste and lower utility bills over time
TOP-ACCESS REMOVABLE FILTER FOR EASY MAINTENANCE – The innovative top-mounted filter can be removed and rinsed without disconnecting the bottom water supply line. Unlike traditional bottom filters that may require tools, draining water, and messy disassembly, this easy-clean design helps reduce sediment buildup, maintain steady water flow, and make routine toilet fill valve maintenance cleaner and easier
EASY-ADJUST TOILET FILL VALVE HEIGHT – Designed for faster and smoother DIY installation, this toilet fill valve features a simple pull-and-set height adjustment that extends from 8.5" to 11" to fit most toilet tanks. Unlike stiff or hard-to-adjust designs, the easy telescopic structure helps reduce installation struggle, repeated trial-and-error, and setup frustration, making it easier to match your tank height with less effort
DURABLE ABS MATERIALS, STAINLESS STEEL PARTS & RELIABLE SEALING – Built with high-quality ABS plastic components and stainless steel parts selected for toilet valve applications, this dual flush valve kit is designed to resist corrosion, handle repeated daily use, and perform reliably under varying water pressure conditions. The extra-thick rubber seals help reduce leaks and support long-term, dependable performance after proper installation

Why You'll Love It

Resolves constant running water, weak flushes, leaks, and unresponsive tank buttons
Dual-flush options offer 0.8-1.0 GPF for liquids and 1.6 GPF for solids to save water
Telescopic overflow tube adjusts from 8.6 to 12 inches without any cutting required
Top-access removable filter rinses clean without disconnecting your water supply line
Durable ABS plastic, stainless steel hardware, and thick rubber seals prevent leaks

Pros

+No-cut telescopic overflow tube simplifies setup
+Top-mounted filter rinses without disconnecting water lines
+Adjustable fill valve height fits various tanks
+Includes water-saving dual flush settings

Cons

-Not compatible with two-piece toilets
-Only fits top push button configurations

Detailed Review

The Senshare 2-Inch Dual Flush Valve Replacement Kit is a comprehensive internal repair set built specifically for one-piece dual flush toilets with top push buttons. It addresses common plumbing headaches such as running water, ghost flushing, bowl leaks, and stiff buttons by replacing the flush valve, fill valve, and primary seals in one go.

Installation is designed to minimize hassle with several adjustable elements. The telescopic overflow tube extends from 8.6 to 12 inches (22 to 30.5 cm), removing the need to cut plastic tubes down to size. Alongside it, the fill valve features a pull-and-set height adjustment mechanism that adjusts from 8 inches to 13 inches (with a listed adjustment range of 8.5 to 11 inches on the valve body) to match different tank depths. Everyday maintenance is also simplified through a top-mounted filter that you can remove and rinse clear of sediment without disconnecting the bottom water supply line.

For water efficiency, the dual flush setup provides a half flush using approximately 0.8 to 1.0 GPF for liquids and a full 1.6 GPF flush for solids. The hardware is made with ABS plastic, stainless steel components, and extra-thick rubber seals to handle daily use and fluctuating water pressures.

This kit has strict physical compatibility limits. It will not work on two-piece toilets or models with side or front trip levers. Tank requirements are specific: the flush valve opening must measure between 2.5 and 3 inches, and the lid button hole must measure between 1.9 and 2.2 inches. Compatible brands include select models from Glacier Bay, TOTO, Kohler, AquaSource, Project Source, HOROW, DEERVALLEY, and Water Ridge, provided the dimensions match.

Verdict: This replacement kit is an ideal solution for homeowners looking to fix leaks, restore strong flushing, or add water-saving functionality to a compatible one-piece dual flush toilet without replacing the entire fixture.

Specifications

Toilet Type Compatibility: 1-piece dual flush toilets with top push buttons only
Flush Valve Opening: Fits 2.5 inches to 3 inches
Tank Lid Button Hole: Fits 1.9 inches to 2.2 inches diameter
Overflow Tube Adjustment: 8.6 inches to 12 inches (22 to 30.5 cm)
Fill Valve Height Adjustment: 8 inches to 13 inches (pull-and-set 8.5 to 11 inches)
Flush Volume: 0.8-1.0 GPF (half flush) / 1.6 GPF (full flush)
Materials: ABS plastic, stainless steel parts, rubber seals
Brand Compatibility: Select models from Glacier Bay, AquaSource, Project Source, HOROW, DEERVALLEY, TOTO, Kohler, Water Ridge

Who Should Buy It

A great fit if you:

Own a one-piece dual flush toilet suffering from leaks, ghost flushing, or unresponsive top buttons
Want to adjust overflow tube height without having to measure and cut plastic piping
Prefer maintaining the intake filter from the top without disconnecting water lines
Want to lower water usage using 0.8-1.0 GPF and 1.6 GPF flush modes

Consider something else if you:

Have a standard two-piece toilet where the tank is separate from the bowl
Have a toilet that uses a side or front handle instead of a top push button
Have tank openings smaller than 2.5 inches or larger than 3 inches

FAQ

Will this valve kit work on a two-piece toilet?
No. It is exclusively designed for one-piece dual flush toilets and is not compatible with two-piece models.

What tank dimensions are required for this kit?
Your toilet must have a flush valve opening between 2.5 and 3 inches, and the tank lid button hole must measure between 1.9 and 2.2 inches in diameter.

Do I need to cut the overflow tube to fit my tank height?
No. The overflow tube features a telescopic design that adjusts from 8.6 to 12 inches without any cutting.

How does the top-access filter work?
The filter is mounted at the top of the fill valve, allowing you to pull it out and rinse away sediment without disconnecting the bottom water supply line.