--- product_id: 276986561 title: "GENUINE PART GP1138930 Silent Fill Toilet Fill Valve Kit" brand: "kohler" price: "$48.04" currency: USD in_stock: true reviews_count: 5 category: "Kohler" url: https://www.desertcart.us/products/276986561-genuine-part-gp1138930-silent-fill-toilet-fill-valve-kit store_origin: US region: United States of America --- # Multiple fill-rate inserts for water savings Adjustable height for universal fit Silent fill technology GENUINE PART GP1138930 Silent Fill Toilet Fill Valve Kit **Brand:** kohler **Price:** $48.04 **Availability:** ✅ In Stock ## Summary > 🚽 Upgrade your flush game with silent precision and eco-smart efficiency! ## Quick Answers - **What is this?** GENUINE PART GP1138930 Silent Fill Toilet Fill Valve Kit by kohler - **How much does it cost?** $48.04 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/276986561-genuine-part-gp1138930-silent-fill-toilet-fill-valve-kit) ## Best For - kohler enthusiasts ## Why This Product - Trusted kohler brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Whisper-Quiet Refill:** Experience a serene bathroom with silent fill technology that eliminates noisy tank refills. - • **Custom Fit, Every Time:** Adjustable height ensures seamless compatibility with a wide range of Kohler toilets—no guesswork needed. - • **Eco-Smart Water Control:** Optimize water usage effortlessly with multiple fill-rate inserts designed to conserve every drop. - • **Easy Top-Knob Adjustment:** Fine-tune fill levels quickly and conveniently from the top, making maintenance a breeze. - • **Genuine Kohler Assurance:** Protect your investment with an authentic Kohler part engineered for durability and peak performance. ## Overview The KOHLER GENUINE PART GP1138930 Silent Fill Toilet Fill Valve Kit delivers quiet, efficient tank refilling with adjustable height and multiple fill-rate inserts for water conservation. Designed by Kohler engineers, this genuine part ensures optimal performance and compatibility with various Kohler toilets, backed by a strong customer rating and easy top-access adjustments. ## Description Protect the warranty on KOHLER products, always look for the KOHLER GENUINE PARTS logo. KOHLER GENUINE PARTS are designed by KOHLER engineers to maintain original product performance and promote product longevity. Review: The connector (7/8 ballcock) is special and not listed in the documentation. In Singapore this is not common and I had to order an special braided hose with the correct connector. But the fill valve is well built, easy to adjust the fill levels from the top knob. Review: lasted 6 weeks ## Features - Kohler genuine part - Silent fill provides a gracious experience by filling the tank quietly - Multiple fill-rate inserts are provided to optimize performance and conserve water. - Adjustable to accommodate any height, compatible with various Kohler toilets. - Confirm shank color to determine correct part; If grey, use this part and if black, use GP1083167.Cap color may vary ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003MH314U | | ASIN | B003MH314U | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #27,697 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #48 in Toilet Flush Valves | | Color | Colors may vary | | Customer Reviews | 4.6 4.6 out of 5 stars (4,891) | | Customer reviews | 4.6 4.6 out of 5 stars (4,891) | | Date First Available | 16 August 2012 | | Date First Available | 16 August 2012 | | Finish | No Finish | | Included components | valve, inserts, fill hose, and assembly hardware | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 1 g | | Item model number | GP1138930 | | Item model number | GP1138930 | | Manufacturer | Kohler | | Manufacturer | Kohler | | Material | Metal Plastic | | Part number | GP1138930 | | Pattern | Kit | | Product Dimensions | 33.02 x 8.89 x 7.62 cm; 1 g | | Product Dimensions | 33.02 x 8.89 x 7.62 cm; 1 g | | Shape | shape | | Size | 12.5" x 3.5" x 3" | | Special Features | Adjustable | | Specification met | RoHS, PED, MD | | Style | Plumbing Overstock | ## Product Details - **Brand:** Kohler - **Exterior finish:** White - **Inlet connection size:** 0.88 Inches - **Item dimensions L x W x H:** 33 x 8.9 x 7.6 centimeters - **Material:** Metal Plastic ## Images ![GENUINE PART GP1138930 Silent Fill Toilet Fill Valve Kit - Image 1](https://m.media-amazon.com/images/I/51L8yOoCVEL.jpg) ## Available Options This product comes in different **Pattern** options. ## Questions & Answers **Q: A reviewer complained that this is actually a Fluidmaster 400A. Is that what you got or was that reviewer ripped off?** A: It's a variation on the 400 series. Fluidmaster makes maybe over a dozen different versions including OEM versions sold by Kohler, PerforMAX versions, ones with brass shanks, etc. The only thing that seems to be exactly the same among all versions is the float and the (replaceable) seal. Almost every Fluidmaster fill valve (including the 747PRO) uses the Model 242 seal. As others noted, it comes with a set of restrictor inserts to reduce the amount of water going into the bowl. You want to use the one that just manages to fill the bowl to the maximum around the same time as the tank is filled. I found the green one is installed in 400A valves in an American Standard Cadet 3. Those factory installed valves are EXACTLY the same as retail 400A valves, except for the insert and that they use a hex nut (which requires a tool to install/remove) rather than a wing nut that has to be tightened/loosened by hand. Someone mentioned the roller clamp in the PerforMAX. Fluidmaster has a newer one (400H) that uses a dial that varies the restriction. Much easier to adjust than the roller clamp. Fluidmaster has also been adding a bigger adjustment knob to most of its fill valves, so the photo might not reflect that yet. **Q: I purchased a Kohler Fill Valve that requires you to adjust the length of the stem by turning one part in or out...Mine will not go smaller or larger?** A: Mine had the same problem! It just spun. Somethign was stuck and I got extremely frustrated. The directions said to turn, but that did nothing. Turns out the whole base can be pulled straight out if the retaining collar is slid upward. After sliding that collar up, give it a good yank. Just don't break the valve and float at the top; I just about did. This fluidmaster video explains how. It's not the exact match, but is pretty much the same exact setup since Fluidmaster makes the official Kohler fill valve. Watch this video and you'll see what I mean: https://youtu.be/3Q-VzqqH5dg?t=1m22s **Q: This says universal. Can it replace the old ball and arm style fills valves?** A: Well my Kohler toilet had a Ball and arm that came in it originally and it started leaking, and I used this to replace it. Was really quite easy to do, most difficult part is removing the water inside the tank that's left over after you turn off the water and flush. I used several old towels. You could also if you had enough space undo the fill valve and have a container to catch the water. Other than that its quite easy. **Q: Does the Washer, Locknut and Clip come on this like the original Kohler part this replaced OR is it no longer needed with the new replacement?** A: All required washer locknut and clip come inside the package- yes you still need them as it will install as an exact match to what was there previously ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by C***L on 18 May 2023* The connector (7/8 ballcock) is special and not listed in the documentation. In Singapore this is not common and I had to order an special braided hose with the correct connector. But the fill valve is well built, easy to adjust the fill levels from the top knob. ### ⭐ Review *by F***N on 18 November 2025* lasted 6 weeks ### ⭐⭐⭐⭐⭐ Review *by J***I on 13 February 2026* The Kohler Silent Fill Toilet Valve Kit is a reliable replacement part that made fixing my toilet much easier. It’s designed to replace an old or worn‑out fill valve on Kohler toilets, and the “silent fill” feature noticeably reduces the usual rumbling or loud refill noise after flushing. Installation was straightforward — I followed the instructions, and it fit well without any complicated plumbing tools. The height is adjustable so it can match the tank’s water level properly, and the adjustment helped me get the right fill rate easily. As an OEM (original equipment manufacturer) part, it feels solid and durable. Most users report that it works quietly and reliably after installation, though there are occasional reports of adjustment being a little tricky at first. Bottom line: If your toilet is noisy, runs constantly, or isn’t filling right, this silent fill valve kit is a practical and affordable way to restore smooth, quiet performance. Great value for a basic but essential toilet repair part. ## Frequently Bought Together - KOHLER Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts - Kohler Part 85406 2" Toilet Flush Valve Kit, Colors may vary - Kohler (BLUE PART GP85160 FLAPPER WITH FLOAT), 2, 2 In. --- ## 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.us/products/276986561-genuine-part-gp1138930-silent-fill-toilet-fill-valve-kit](https://www.desertcart.us/products/276986561-genuine-part-gp1138930-silent-fill-toilet-fill-valve-kit) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-17*