Best Toilet Replacement Parts Under $100 (2026)
We ranked parts under $100 by a value score using compatibility, material quality, included components, and brand reliability
The Verdict
- Best Overall: Sloan A-1001-A Diaphragm Rebuild Kit for Regal Flushometers — Best rebuild kit: reliable diaphragm components for Regal flushometers that simplify in-field rebuilds
- Best Value: Sloan Urinal Diaphragm Assembly 1.0 GPF (A-1042-A) for Royal Flushometers — Best urinal diaphragm: 1.0 GPF assembly tailored for Royal flushometers to maintain low-flow performance
This roundup highlights toilet replacement parts under $100 chosen for durability, compatibility, and value for common commercial and residential flush systems. Selections were screened for brand reputation, part type (diaphragms, cartridges, seals, filters, valves), and measurable features that affect repair success
Top Picks
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1
Best Overall Sloan A-1001-A Diaphragm Rebuild Kit for Regal Flushometers
Best rebuild kit: reliable diaphragm components for Regal flushometers that simplify in-field rebuilds
Diaphragm rebuild kit for Sloan Regal flushometers with 4.5 GPF. Includes parts for a successful install and optimized water usage. Customers note easy installation and good value, with some reports of leakage concerns
- complete parts kit
- water-saving design
- easy installation
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2
Replacement flush valve cartridge kit for Flushmate 503H
Best for pressure-assisted toilets: replacement cartridge built for Flushmate 503H systems to restore reliable flushing
Replacement flush valve cartridge kit designed for Flushmate systems, delivering regulated water flow for consistent performance. Includes duckbill valve, filter screen & lower supply filter for easy maintenance. Customers note ease of installation and clear instructions
- regulated GPF for consistent flush
- includes complete valve cartridge kit
- corrosion-resistant construction
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3
Best Value Sloan Urinal Diaphragm Assembly 1.0 GPF (A-1042-A) for Royal Flushometers
Best urinal diaphragm: 1.0 GPF assembly tailored for Royal flushometers to maintain low-flow performance
Sloan urinal diaphragm assembly with PERMEX synthetic rubber and dual-filtered bypass ensures consistent flush. Replacement for Royal Flushometers; helps limit water usage and maintain proper flushing
- PERMEX diaphragm
- dual-filtered bypass
- designed for Royal Flushometers
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4
Sloan Royal Urinal Diaphragm Tune-Up Kit 1.5 GPF
Best tune-up kit: includes urinal diaphragm parts sized for 1.5 GPF Royal units to streamline maintenance
Sloan Royal urinal diaphragm tune-up repair kit for 1.5 GPF flushometers. Improves efficiency and water usage; users note a good fit and value for money
- complete diaphragm assembly kit
- water-usage reduction design
- compatibility with Sloan Royal 1.5 GPF
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5
Kohler GP1059291 Toilet Tank Canister Valve Seal 6-pk
Best seal pack: multi-piece canister valve seals for Kohler tanks that simplify repeated seal replacements
Kohler genuine part GP1059291 seal set for toilet tank canisters. Yellow seal resists wear from chemicals and use. customers note easy installation
- genuine Kohler part
- yellow seal for leak resistance
- 6-pack value
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6
Sloan Royal Water Closet Diaphragm Assembly (1.28 GPF) for Royal Flushometers
Best water-closet diaphragm: 1.28 GPF diaphragm assembly designed for Royal flushometers to sustain consistent flushes
Replacement diaphragm assembly for Sloan Royal flushometers with PERMEX rubber and dual-filtered bypass. Designed to ensure consistent flush amounts and reduce water waste. Customer note: high-quality fit and good value
- PERMEX diaphragm material
- dual-filtered bypass
- designed for consistent flush
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7
Sloan Royal Diaphragm Assembly 3.5 GPF for Royal Flushometers
Best high-flow diaphragm: 3.5 GPF assembly for Royal flushometers suited to high-volume commercial fixtures
Diaphragm assembly kit with PERMEX synthetic rubber and dual-filtered bypass for Royal Flushometers. Designed to replace worn diaphragms and optimize flush accuracy. Customer notes good quality, perfect fit, and value
- PERMEX diaphragm material
- Dual-filtered bypass
- Royal Flushometer compatibility
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8
Sloan A-1050-A High Efficiency Urinal Diaphragm Assembly
Best high-efficiency urinal part: A-1050-A diaphragm assembly engineered for reduced-flow urinal performance
The Sloan A-1050-A urinal diaphragm assembly replaces worn units and features a Dual-Filtered Fixed Bypass for controlled flushes. It is designed as a replacement part for Royal Flushometers; ensures consistent flushing and improved water efficiency
- dual-filtered fixed bypass
- OEM replacement part
- designed for consistent flushes
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9
Washlet deodorizer carbon filter for Toto THU6474-01/THU6072
Best deodorizer filter: activated carbon cartridge sized for compatible Washlet models to reduce odors
deodorizer cartridge with activated carbon filter for Toto washlets; helps reduce odors and keep bathroom smelling fresh. customers note good fit and odor control, with mixed views on lifespan
- activated carbon deodorizing filter
- compatible with multiple Toto washlets
- 3-6 month replacement guideline
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10
Saillong 12-Pack Toilet Fill Valve Replacement
Best universal fill valve pack: 12-piece adjustable fill valves offering height adjustment and quiet operation for varied toilets
Universal toilet fill valve replacement kit with height adjustment and quiet operation. Easy to install and refills quickly, with automatic shutoff to avoid overflow. Customers note good build quality and fit, with mixed feedback on adjustability
- universal G15/16" inlet compatibility
- 813'' height adjustment
- quiet, automatic refill