# Fluidmaster K-400H-039 Toilet Fill Valve and Flapper Kit *Published: 2026-01-09 | Updated: 2026-01-09 | Source: https://shopsavvy.com/products/fluidmaster-k-400h-039-toilet-fill-valve-and-flapper-kit* --- **Brand:** Fluidmaster **Price Range:** $9.5 - $35.23 across 48 retailers ## Pros - Easy and quick installation with clear, easy-to-follow instructions suitable even for beginners and DIY enthusiasts - Adjustable 2-inch flapper allows for fine-tuning flush performance and water flow - Provides a stronger, more effective flush with reliable positive shut-off to prevent running water waste - Quiet operation with smooth fill valve performance, eliminating annoying running noises - Comes as a complete kit including all necessary parts for a full toilet repair or upgrade - Reliable sealing that effectively stops leaks and running toilet issues - Compatible with braided supply lines for increased installation stability - Suitable for multiple uses with consistent quality reported across several purchases - Valve height and flow adjustments are straightforward and user-friendly ## Cons - The connecting tube is shorter than some previous models and may interfere with the flush lever, sometimes requiring a replacement tube - The adjustable valve can occasionally leak a tiny stream of water at certain settings, though it usually does not cause significant problems - Slightly slower refilling speed compared to older models - Build quality is decent for the price but not expected to last for decades; some users may want a longer-term solution ## About This Product Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit ## Current Prices | Retailer | Price | Availability | |----------|-------|-------------| | [My Store](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/977svH1R9oLGlGJxgnGx?source=shopsavvy&medium=product-page) | $9.50 | Check | | [Amazon](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/5vPEWn5kVG2oh4aD09IZ?source=shopsavvy&medium=product-page) | $10.89 | Check | | [Ideal True Value Home Center](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/Fe0tEA1ZBG6mAeuw10D8?source=shopsavvy&medium=product-page) | $15.18 | Check | | [Shell Lumber and Hardware](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/9f858d00-09b4-51be-bcfd-dc95b091a487?source=shopsavvy&medium=product-page) | $15.73 | Check | | [SupremeDIY.com](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/2899f75b-73ae-5c39-34f5-38fedbc7abe2?source=shopsavvy&medium=product-page) | $15.78 | Check | | [retailers/rplumber](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/qIhS4CsQq95tsBSTJucL?source=shopsavvy&medium=product-page) | $15.98 | Check | | [BuilderDepot](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/qULV3suoNuSmFFTPVxjQ?source=shopsavvy&medium=product-page) | $15.98 | Check | | [Hardware & Moreee](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/n2crGcdb2dNjIjO73hta?source=shopsavvy&medium=product-page) | $15.98 | Check | | [Max Warehouse](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/pOMzGg2c5oly4yAry0U0?source=shopsavvy&medium=product-page) | $15.98 | Check | | [MID Hardware](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/eXjjSDYYdKiAEcOGYeTu?source=shopsavvy&medium=product-page) | $15.98 | Check | | [SupplyHog](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/jqrDzyFLVzgLyvsib1kj?source=shopsavvy&medium=product-page) | $15.98 | Check | | [retailers/opentip](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/5bea08aa-4c16-271f-b321-816dfc732d6c?source=shopsavvy&medium=product-page) | $16.32 | Check | | [retailers/nationalsupplynetwork](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/bf2eabd1-d2b7-eb22-d67c-2a2d303e61ff?source=shopsavvy&medium=product-page) | $16.79 | Check | | [The Home Depot](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/4f1d0500-8c38-c694-6d1f-f369878403a7?source=shopsavvy&medium=product-page) | $16.96 | Check | | [Walmart](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/3d85c4a0-6ade-7860-1f3d-9266bf3fcbf2?source=shopsavvy&medium=product-page) | $16.98 | Check | | [retailers/sabersales](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/8e14c412-de14-8ddc-ed2d-fba2d48b4f95?source=shopsavvy&medium=product-page) | $16.99 | Check | | [HardwareAndTools.com](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/8996b125-4279-0aca-4d23-a4d93287b102?source=shopsavvy&medium=product-page) | $17.19 | Check | | [Store Seven](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/ZrFNglTyEW8ZoS82YFCj?source=shopsavvy&medium=product-page) | $17.47 | Check | | [DoorDash.com](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/0dfe1ea7-c911-799e-081b-e5a96515f642?source=shopsavvy&medium=product-page) | $17.48 | Check | | [Lowes](https://shopsavvy.com/api/redirect/products/1iJkMg90XYThuYF2CSnb/offers/d68b4c69-bf38-c0a5-81e9-0b5e985ea0f6?source=shopsavvy&medium=product-page) | $17.48 | Check | [See every retailer and the full price history on ShopSavvy](https://shopsavvy.com/products/fluidmaster-k-400h-039-toilet-fill-valve-and-flapper-kit) --- *About this page: ShopSavvy compares prices across thousands of retailers, aggregates expert and user reviews, and tracks price history to help you make informed buying decisions. 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