--- product_id: 433282442 title: "Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit" brand: "fluidmaster" price: "KD 9.50" currency: KWD in_stock: true reviews_count: 13 category: "Fluidmaster" url: https://www.desertcart.com.kw/products/433282442-fluidmaster-k-400h-039-high-performance-toilet-fill-valve-2 store_origin: KW region: Kuwait --- # Adjustable water control for optimal flush Easy install with universal 2-inch fit 7-year warranty for lasting reliability Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit **Brand:** fluidmaster **Price:** KD 9.50 **Availability:** ✅ In Stock ## Summary > 🚽 Upgrade your flush game with precision and ease—because your throne deserves the best! ## Quick Answers - **What is this?** Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit by fluidmaster - **How much does it cost?** KD 9.50 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/433282442-fluidmaster-k-400h-039-high-performance-toilet-fill-valve-2) ## Best For - fluidmaster enthusiasts ## Why This Product - Trusted fluidmaster brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Longevity:** Backed by a 7-year limited warranty, this kit is engineered to keep your toilet running like new. - • **Effortless Installation:** No YouTube tutorials needed—quick, straightforward setup saves you time and hassle. - • **Precision Water Control:** Dial in your perfect flush with adjustable tank and bowl water settings for maximum efficiency. - • **Water-Saving Innovation:** Includes PerforMAX flapper designed to reduce water use per flush without sacrificing performance. - • **Durable & Corrosion-Resistant:** Built with a solid frame and corrosion-resistant flapper to ensure a secure, leak-free seal. ## Overview The Fluidmaster K-400H-039 is a high-performance toilet fill valve and 2-inch adjustable flapper kit designed for universal 2-inch flush valve toilets. Featuring adjustable water control for both tank and bowl, corrosion-resistant materials, and a solid frame for a secure seal, it ensures a powerful, water-efficient flush. Easy to install and backed by a 7-year warranty, this kit is a top-rated, reliable upgrade that keeps your toilet running quietly and efficiently. ## Description Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit ## Features - The PerforMAX fill valve and 2 in. Flapper Kit is the premium solution to make your 2 in. flush valve toilet run like new - PerforMAX toilet fill valve offers high performance with adjustable tank and bowl water for full water control - Fast and Easy to Install - PerforMAX Water-Saving Toilet Flapper included to save water use per flush - Adjustable fill valve height to fit more tanks, corrosion resistant flapper, Solid frame for a secure seal, 7 year warranty ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09NYLJ1FZ | | Best Sellers Rank | #530 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Toilet Flappers | | Brand | Fluidmaster | | Brand Name | Fluidmaster | | Connector Type | Female Iron Pipe, FNPT | | Customer Reviews | 4.6 out of 5 stars 4,013 Reviews | | Exterior Finish | Plastic | | Global Trade Identification Number | 00039961031815 | | Included Components | PerforMAX Toilet Fill Valve, 2-Inch Flapper | | Inlet Connection Size | 2 Inches | | Inlet Connection Type | Female Iron Pipe | | Item Dimensions | 3.54 x 6.3 x 2.38 inches | | Item Type Name | Toilet Repair Kit | | Item Weight | 13.6 Ounces | | Item dimensions L x W x H | 3.54 x 6.3 x 2.38 inches | | Manufacturer | Fluidmaster | | Manufacturer Part Number | K-400H-039-T14 | | Manufacturer Warranty Description | 7 Year Limited | | Material | Plastic | | Material Type | Plastic | | Maximum Pressure | 80 Pound per Square Inch | | Model Number | K-400H-039-T14 | | Number of Ports | 2 | | Outlet Connection Size | 2 Inches | | Outlet Connection Type | FNPT | | Set Name | SET | | Size | Universal, for 2 In. | | Smart Home Compatibility | Not Smart Home Compatible | | Specification Met | CSA, ULC | | Thread Size | 2 inches | | Thread Type | NPT | | UPC | 039961031815 | | Unit Count | 1.0 Count | | Valve Type | PerforMAX Toilet Fill Valve | ## Product Details - **Brand:** Fluidmaster - **Exterior Finish:** Plastic - **Inlet Connection Size:** 2 Inches - **Inlet Connection Type:** Female Iron Pipe - **Item dimensions L x W x H:** 3.54 x 6.3 x 2.38 inches - **Material:** Plastic - **Maximum Operating Pressure:** 80 Pound per Square Inch - **Number of Ports:** 2 - **Outlet Connection Size:** 2 Inches - **Outlet Connection Type:** FNPT ## Images ![Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit - Image 1](https://m.media-amazon.com/images/I/71FddZ8DTML.jpg) ![Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit - Image 2](https://m.media-amazon.com/images/I/71Ae6dnVvXL.jpg) ![Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit - Image 3](https://m.media-amazon.com/images/I/61S9kjP1ixL.jpg) ![Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit - Image 4](https://m.media-amazon.com/images/I/51M-L6WZ1VL.jpg) ![Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit - Image 5](https://m.media-amazon.com/images/I/71pm7lz-qoL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: will this replace a 400A on an american standard 4392?** A: Yes this will replace the 400A and flapper that is in that model of tank. For more information please contact Fluidmaster’s Technical Service Department, we are available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011. **Q: My new one leaks a little when you flush. Under the blue cap just a few drops than it stops leaking. Is this a normal release of water when flushed ?** A: I would have been thrilled if mine had only leaked a few drops. Mine sprayed water like a fire hose so I returned it. **Q: Will this fit a Kohler 1.6 gallon toilet?** A: I see no reason why not, unless your tank is too low to put the tank lid or cover back on. check height of fill valve and tank depth **Q: Does this work with the toilets that does not have handles.. we have the one where you have to push the button in the center top of the tank.. Thanks** A: The part you are buying is the tube that refills the tank after the flush has occurred. Whether the flush is because of a handle or a button on the top of the tank. this unit is is separate from that action. The flapper valve included may or may not work with your tank but the unit itself to fill the tank over and over will work just fine. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by H***B on April 5, 2026* ### ⭐⭐⭐⭐⭐ Review *by P***S on April 22, 2026* ### ⭐⭐⭐⭐⭐ Review *by T***S on September 21, 2025* ## Frequently Bought Together - Fluidmaster K-400H-039 High Performance Toilet Fill Valve with 2-Inch Adjustable Toilet Flapper Kit - Hibbent Universal Metal Front Mount Toilet Handle Replacement Kit, Brass Toilet Flush Tank Lever with Stainless Steel Flapper Chains for Most Toilets, Chrome - Toilet Flush Handle Replacement Kit: Front Universal Toilet Bowl Replacement Kit, Toilet Repair Kit Inside Tank Chain Flusher Handle Lever Replacement Parts Compatible with American Standard Mansfield --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.kw/products/433282442-fluidmaster-k-400h-039-high-performance-toilet-fill-valve-2](https://www.desertcart.com.kw/products/433282442-fluidmaster-k-400h-039-high-performance-toilet-fill-valve-2) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-18*