--- product_id: 8526420 title: "Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts" brand: "kohler" price: "AR$90484" currency: ARS in_stock: true reviews_count: 13 category: "Kohler" url: https://www.desertcart.com.ar/products/8526420-silent-fill-toilet-valve-kit-genuine-part-gp1138930-adjustable-multiple store_origin: AR region: Argentina --- # Water-saving inserts Silent fill tech Adjustable height & flow Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts **Brand:** kohler **Price:** AR$90484 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your throne with silent precision and smart water savings! ## Quick Answers - **What is this?** Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts by kohler - **How much does it cost?** AR$90484 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/8526420-silent-fill-toilet-valve-kit-genuine-part-gp1138930-adjustable-multiple) ## 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 - • **Durable OEM Quality:** Genuine Kohler engineering ensures long-lasting performance and seamless compatibility. - • **Whisper-Quiet Refill:** Experience near-silent tank filling that keeps your home peaceful and disruption-free. - • **Customizable Flow Control:** Multiple color-coded inserts let you optimize water usage and tank refill speed effortlessly. - • **DIY-Friendly Installation:** Designed for straightforward setup—even if plumbing isn’t your forte, save time and avoid costly calls. - • **Precision Height Adjustment:** Easily twist to extend valve length up to 14 inches for a perfect fit in any Kohler Class 5 toilet. ## Overview The KOHLER Silent Fill Toilet Valve Kit GP1138930 is a genuine OEM replacement part engineered for Kohler Class 5 toilets. Featuring advanced silent fill technology, adjustable height up to 14 inches, and multiple fill-rate inserts, it delivers quiet, efficient tank refilling while conserving water. Durable and easy to install, this valve restores optimal toilet performance with minimal hassle, making it a must-have upgrade for any modern home. ## Description Product 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. From the Manufacturer Kohler Genuine Part, Fill Valve, For most Kohler toilets. Review: great fit - 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. Review: Nearly identical to 25 year old Kohler valve, easy to install even for a plumb-tard if you can Google and have slip joint pliers - My original Kohler GP1138930/400a lasted nearly 25 years - amazing longevity. I knew it was dying a slow death when I would hear it fill by itself at night and running long after flushing. I ordered this new valve from desertcart about a week ago. The valve finally quit last night and I shut the water to the toilet off and fixed it today. When I removed the 25 year old fill valve today and compared it to the new one, it was nearly a dead ringer. The major change that jumped out was that the former valve had a metal float adjustment rod had been changed to a threaded plastic screw rod which is actually far easier to adjust than the previous version. One thing to know is that this new valve is expandable in length to almost 14" from the inside of the tank to the valve top simply by twisting the threaded gray valve stem. It was exactly the same setup on the 25 year old valve and I just matched the length because there are 1" increments on the gray stem up to 13" and the original was set at 13". So take note of those little details if you are replacing the same valve and save some time and aggravation The new valve comes with a variety of color coded water restrictors that go on the output hose. The original valve didn't have any of these restrictors in place so I didn't use them and the valve worked great but your situation may vary. There are some helpful installation videos on YouTube if you Google "replace Kohler 400a toilet tank valve" and go to videos. I'm very handy around the house and was a diesel and auto mechanic decades ago after college to bank some $$ prior to going back to college for pharmacy school. I can fix almost anything but plumbing always seems to be my Achilles heel, even as a diesel mechanic - hydraulic lines can be a real pain. In home plumbing, there's always a leak, a missing part, some tool I don't have, something I over tighten and break or under tighten and it leaks or the inevitable hardware store trip(s). The new valve was simple to install, didn't leak, required very common hand tools and I only made one trip to the hardware store for a new 12" stainless supply line. If I'm changing the valve, I may as well change the supply line as well, The new Kohler valve is simple to adjust for fluid flow, shutoff height and actual installation. As I mentioned, plumbing never seems to go well for me despite the fact that I can wire outlets and ground faults, light fixtures, AC units and hot tubs, install drywall, do flawless custom finish/trim work and install any sort of interior door. But my plumbing skills simply suck. So this valve MUST be easy to install if a plumb-tard like me can get it done in under an hour. I realize some folks have zero ability in this area and that's plumbers make 6 figures a year because they earn it by being really good at work that annoys others to death. If you are one of those folks, dial up your local plumber and be ready to donate $100 - $150+ for this repair. I just ordered two more of these valves, new USA made 12" stainless flex water lines and new Kohler flush handles from desertcart for my other two toilets in the same house. If one valve died after nearly 25 years, the other two have to be close to failure as well so I may as well change them all out after beating the learning curve, while my plumbing luck holds out and before the other old ones crap out - pun intended. Photos: I added some photos. The left hand photo shows the my 25 year old Kohler/Fluidmaster 400a next to the new one from desertcart. The new one has been extended by holding the gray stem and twisting the black stem to it's max length for my installation - yours may vary. The middle photo shows the removal of the small blue metering jet from the new valve. My original valve had no metering jet installed and I followed suit. Again, your situation may vary. The far right photo shows one of the weak points of the new valve. The black tube is new and is included in the kit along with the little metal squiggle annotated by the red arrow. That metal squiggle is supposed to hold the fill hose in the plastic fill pipe in the toilet tank. The old fill tube hardware annotated by the yellow arrow is the original set up that I cleaned up with CLR and reinstalled. The new metal squiggle just didn't work for me and could be a 1 star deduction in some customers eyes. New isn't always better. ## Features - Silent Fill Technology: Provides a gracious experience by filling the tank quietly - Adjustable with Multiple Fill-rate Inserts: Are provided to optimize performance and conserve water - Compatibility: Compatible with Kohler Class 5 toilets; confirm shank color to determine correct part; If grey, use this part and if black, use GP1083167 - Please note: Cap color may vary. Never use an abrasive material such as a brush or scouring pad to clean surfaces ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003MH314U | | Best Sellers Rank | #4,944 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #5 in Toilet Flush Valves | | Brand | Kohler | | Brand Name | Kohler | | Customer Reviews | 4.6 out of 5 stars 5,076 Reviews | | Exterior Finish | White | | Global Trade Identification Number | 00650531935076 | | Included Components | valve, inserts, fill hose, and assembly hardware | | Inlet Connection Size | 0.88 Inches | | Inlet Connection Type | Fill | | Item Dimensions | 13 x 3.5 x 3 inches | | Item Type Name | KOHLER GENUINE PART | | Item Weight | 1 Grams | | Item dimensions L x W x H | 13 x 3.5 x 3 inches | | Manufacturer | KOHLER | | Manufacturer Part Number | GP1138930 | | Material | Metal, Plastic | | Material Type | Metal, Plastic | | Model Number | GP1138930 | | Number of Ports | 2 | | Outlet Connection Size | 0.88 Inches | | Outlet Connection Type | Fill | | Size | 12.5" x 3.5" x 3" | | Specification Met | oem | | Thread Size | 0.875 inches | | Thread Type | NPT | | UPC | 650531935076 | | Unit Count | 1.0 Count | | Valve Type | Float Cup | ## Product Details - **Brand:** Kohler - **Exterior Finish:** White - **Inlet Connection Size:** 0.88 Inches - **Inlet Connection Type:** Fill - **Item dimensions L x W x H:** 13 x 3.5 x 3 inches - **Material:** Metal, Plastic - **Number of Ports:** 2 - **Outlet Connection Size:** 0.88 Inches - **Outlet Connection Type:** Fill - **Specification Met:** oem ## Images ![Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts - Image 1](https://m.media-amazon.com/images/I/51L8yOoCVEL.jpg) ![Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts - Image 2](https://m.media-amazon.com/images/I/71kEfL92EzL.jpg) ![Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts - Image 3](https://m.media-amazon.com/images/I/51zd3uAyiPL.jpg) ![Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts - Image 4](https://m.media-amazon.com/images/I/51yiAtgtViL.jpg) ![Silent Fill Toilet Valve Kit, Genuine Part GP1138930, Adjustable with Multiple Fill-Rate Inserts - Image 5](https://m.media-amazon.com/images/I/61SBen2Lo9L.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 ### ⭐⭐⭐⭐⭐ great fit *by J***I on February 13, 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. ### ⭐⭐⭐⭐⭐ Nearly identical to 25 year old Kohler valve, easy to install even for a plumb-tard if you can Google and have slip joint pliers *by R***T on February 13, 2017* My original Kohler GP1138930/400a lasted nearly 25 years - amazing longevity. I knew it was dying a slow death when I would hear it fill by itself at night and running long after flushing. I ordered this new valve from Amazon about a week ago. The valve finally quit last night and I shut the water to the toilet off and fixed it today. When I removed the 25 year old fill valve today and compared it to the new one, it was nearly a dead ringer. The major change that jumped out was that the former valve had a metal float adjustment rod had been changed to a threaded plastic screw rod which is actually far easier to adjust than the previous version. One thing to know is that this new valve is expandable in length to almost 14" from the inside of the tank to the valve top simply by twisting the threaded gray valve stem. It was exactly the same setup on the 25 year old valve and I just matched the length because there are 1" increments on the gray stem up to 13" and the original was set at 13". So take note of those little details if you are replacing the same valve and save some time and aggravation The new valve comes with a variety of color coded water restrictors that go on the output hose. The original valve didn't have any of these restrictors in place so I didn't use them and the valve worked great but your situation may vary. There are some helpful installation videos on YouTube if you Google "replace Kohler 400a toilet tank valve" and go to videos. I'm very handy around the house and was a diesel and auto mechanic decades ago after college to bank some $$ prior to going back to college for pharmacy school. I can fix almost anything but plumbing always seems to be my Achilles heel, even as a diesel mechanic - hydraulic lines can be a real pain. In home plumbing, there's always a leak, a missing part, some tool I don't have, something I over tighten and break or under tighten and it leaks or the inevitable hardware store trip(s). The new valve was simple to install, didn't leak, required very common hand tools and I only made one trip to the hardware store for a new 12" stainless supply line. If I'm changing the valve, I may as well change the supply line as well, The new Kohler valve is simple to adjust for fluid flow, shutoff height and actual installation. As I mentioned, plumbing never seems to go well for me despite the fact that I can wire outlets and ground faults, light fixtures, AC units and hot tubs, install drywall, do flawless custom finish/trim work and install any sort of interior door. But my plumbing skills simply suck. So this valve MUST be easy to install if a plumb-tard like me can get it done in under an hour. I realize some folks have zero ability in this area and that's plumbers make 6 figures a year because they earn it by being really good at work that annoys others to death. If you are one of those folks, dial up your local plumber and be ready to donate $100 - $150+ for this repair. I just ordered two more of these valves, new USA made 12" stainless flex water lines and new Kohler flush handles from Amazon for my other two toilets in the same house. If one valve died after nearly 25 years, the other two have to be close to failure as well so I may as well change them all out after beating the learning curve, while my plumbing luck holds out and before the other old ones crap out - pun intended. Photos: I added some photos. The left hand photo shows the my 25 year old Kohler/Fluidmaster 400a next to the new one from Amazon. The new one has been extended by holding the gray stem and twisting the black stem to it's max length for my installation - yours may vary. The middle photo shows the removal of the small blue metering jet from the new valve. My original valve had no metering jet installed and I followed suit. Again, your situation may vary. The far right photo shows one of the weak points of the new valve. The black tube is new and is included in the kit along with the little metal squiggle annotated by the red arrow. That metal squiggle is supposed to hold the fill hose in the plastic fill pipe in the toilet tank. The old fill tube hardware annotated by the yellow arrow is the original set up that I cleaned up with CLR and reinstalled. The new metal squiggle just didn't work for me and could be a 1 star deduction in some customers eyes. New isn't always better. ### ⭐⭐⭐⭐⭐ Great Product! *by K***B on April 6, 2026* Just installed in our guest toilet Very easy to do and works great. Same price at Kohler so buy on Amazon and get it faster. ## 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.com.ar/products/8526420-silent-fill-toilet-valve-kit-genuine-part-gp1138930-adjustable-multiple](https://www.desertcart.com.ar/products/8526420-silent-fill-toilet-valve-kit-genuine-part-gp1138930-adjustable-multiple) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-20*