--- product_id: 4649221 title: "HC660 Toilet Fill Valve Repair Kit, Pack of 1, Blue White" brand: "danco" price: "$39.06" currency: USD in_stock: true reviews_count: 13 category: "Danco" url: https://www.desertcart.us/products/4649221-hc660-toilet-fill-valve-repair-kit-pack-of-1-blue store_origin: US region: United States of America --- # Water-saving tech Leak detection alert Tool-free install HC660 Toilet Fill Valve Repair Kit, Pack of 1, Blue White **Brand:** danco **Price:** $39.06 **Availability:** ✅ In Stock ## Summary > 🚽 Upgrade your flush game—save water, detect leaks, and install like a pro! ## Quick Answers - **What is this?** HC660 Toilet Fill Valve Repair Kit, Pack of 1, Blue White by danco - **How much does it cost?** $39.06 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/4649221-hc660-toilet-fill-valve-repair-kit-pack-of-1-blue) ## Best For - danco enthusiasts ## Why This Product - Trusted danco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Stay Ahead of Leaks:** Built-in audible leak detector alerts you instantly, preventing costly water damage and waste. - • **Effortless DIY Upgrade:** Smart Nut design enables quick, tool-free installation—no plumber needed, no hassle. - • **Optimize Your Water Usage:** Adjustable fill valve saves gallons per flush, cutting your water bill and environmental footprint. - • **Keep It Clean, Keep It Fresh:** Powerful cleaning jets stir tank debris with every flush, maintaining a pristine toilet interior. - • **Custom Fit for Maximum Efficiency:** Height adjustable from 11 to 13.8 inches to perfectly calibrate your toilet’s refill level. ## Overview The HC660 Toilet Fill Valve Repair Kit by Danco is a water-saving, adjustable fill valve featuring an audible leak detection system and powerful cleaning jets. Designed for easy, tool-free installation, it fits most standard toilets with a height adjustable from 11 to 13.8 inches. This innovative kit helps reduce water waste, maintain a cleaner tank, and alerts users to leaks, making it an essential upgrade for eco-conscious, efficiency-driven homeowners. ## Description Product Description Danco is one of the largest plumbing repair, replacement, and remodel suppliers in the home improvement industry focused largely on empowering 'Do-It-Yourself' consumers with plumbing solutions that are as practical as they are affordable, giving your home a more fresh appeal and renewed elegance. We provide stylish design-oriented innovative home solutions that are user-friendly to support and encourage customers to tackle home improvement tasks on their own - without the heavy price tag of professional services. The HC660 HydroClean Toilet Fill Valve kit solves the two biggest reasons for water loss in toilets; miscalibration and leaks. It easily calibrates to adjust the exact amount of water needed in the tank, refills quickly, and jets clean the tank. A unique feature is the leak detection and signals when a leak is found. It is designed to fit most standard toilets and the height can be adjusted from 11 inch to 13.8 inch.The HC660 installs easily without tools. Order yours today! From the Manufacturer Next by Danco exemplifies a line of state-of-the-art plumbing repair parts that empowers the DIYer and Professional to do more than just solve the problem. Don’t just repair it. Improve it. Review: A nice fill valve, helps keep toilet tank clean as well. - a nice toilet valve. I love the feature that keeps the bottom of the tank clean. It was easy to install, did not leak, and is still working great. Review: A True Money Saver! - An easy to install, quality made product that will save most users money through a lower water bill. To check your need for this unit: 1. Pour clean water into your toilet bowl to establish the level needed for a water seal in the base of the bowl. Make a pencil mark at this point. 2. Carefully remove the tank cover and observe the small tubing that is going into the larger over flow tube. 3. Flush the toilet and notice when the water level in the bowl reaches the point where you made the mark. All water flowing "into the bowl" after this point is wasted down the drain. You must observe the slight trickle in the bowl, and not confuse the water flow that is filling the main tank. 4. Now imagine if you had a valve on this small tube that you could adjust the flow, and only allow the proper amount of water needed to establish a seal. That's exactly what the MJSI HC660 does. The fully adjustable valve allows you to adjust the amount of water that goes through the small tubing. If you add the Hydro Clean Tube feature, it also keeps your tank clean on the inside. A very worthwhile product and is fully adjustable as far as water level in the tank goes and allows you to close off the water supply by the float lever, rather than the external valve, that usually starts leaking after being used. I have purchased and installed three of these units in my home and am totally satisfied with their performance and quality. Highly recommended. R. E. W. R. E. W. ## Features - WATER-SAVING toilet fill valve with built-in mini-valve that adjusts tank refill water level - DETECTS LEAKS: The water-saving toilet fill valve sounds an audible alert when a leak is detected making you aware of any potential issues that must be addressed - CLEANING JETS: Strong jets stir up debris in toilet tank in order rush any dirt down the drain with every flush keeping your toilet tank cleaner - EASY ADJUSTMENTS: Shuts off water inside tank making repairs a snap, refills quickly, and has an adjustable height of 11 inches to 13.8 inches - EASY INSTALLATION: Smart Nut helps with easy installation without tools in most standard toiletes - Detects leaks - Cleans the tank - Installs easily without tools - Calibrates your toilet for full flush efficiency ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000L87RKC | | Best Sellers Rank | #39,427 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #51 in Toilet Flush Valves #3,475 in Kitchen & Bath Fixtures | | Brand | Danco | | Brand Name | Danco | | Connector Type | Fill | | Customer Reviews | 4.5 out of 5 stars 2,418 Reviews | | Exterior Finish | Plastic | | Global Trade Identification Number | 00188670000015 | | Included Components | fill valve | | Inlet Connection Size | 0.75 Inches | | Inlet Connection Type | Fill | | Item Dimensions | 10.5 x 3 x 3 inches | | Item Type Name | Repair Kit | | Item dimensions L x W x H | 10.5 x 3 x 3 inches | | Manufacturer | Next by Danco | | Manufacturer Part Number | HC660 | | Manufacturer Warranty Description | Limited 1 Year | | Material | Plastic | | Material Type | Plastic | | Model Number | HC660 | | Number of Pieces | 1 | | Outlet Connection Size | 0.75 Inches | | Outlet Connection Type | Fill | | Set Name | Danco HC660 Toilet Fill Valve Repair Kit - Pack of 1 | | Size | Pack of 1 | | Smart Home Compatibility | Not Smart Home Compatible | | Specification Met | (unset) | | Thread Size | NPT | | Thread Type | NPT | | UPC | 188670000015 | | Unit Count | 1.0 Count | | Valve Type | Float Valve | ## Product Details - **Brand:** Danco - **Exterior Finish:** Plastic - **Global Trade Identification Number:** 00188670000015 - **Inlet Connection Size:** 0.75 Inches - **Inlet Connection Type:** Fill - **Item dimensions L x W x H:** 10.5 x 3 x 3 inches - **Material:** Plastic - **Outlet Connection Size:** 0.75 Inches - **Outlet Connection Type:** Fill - **Specification Met:** (unset) ## Images ![HC660 Toilet Fill Valve Repair Kit, Pack of 1, Blue White - Image 1](https://m.media-amazon.com/images/I/51pVbNByKsL.jpg) ## Questions & Answers **Q: how does it detect leaks?** A: All fill valves have the "audible" leak detection feature. Fluidmaster has a fill valve that actually stops the float from going down with the water level if there is a leak. It works while you're in Hawaii and hear ocean waves and not your toilet. **Q: How does this device clean the toilet?** A: It doesn't clean the toilet, it cleans the inside of the tank. It does this by diverting some of the fill water through a tube that sits around the perimeter of the bottom of the tank. Water jets on this tube stir up sediment at the bottom of the tank so it can be flushed down the drain. **Q: I cannot adjust the height. I think it is not correct** A: I was also stumped by this at first. The trick is to push the little locking tab near the bottom while twisting the unit clockwise from the top. It will only turn about 1/4 turn. In this position the adjustment is unlocked and you can freely (with a little effort) pull it up or push it down. Once you get the top of the unit approximately even with the top of the tank, turn it clockwise 1/4 turn to lock it back in place. **Q: Toilet won’t always flush, it will fill the bowl with more water but won’t always flush?** A: Sounds like not moving enough water fast enough. Make sure the little hole below the water in the front of the bowl is not clogged. Rotate the adjustment on the float to raise the water level in the tank between a quarter and a half an inch. Staying below the overflow tube. ## Customer Reviews ### ⭐⭐⭐⭐⭐ A nice fill valve, helps keep toilet tank clean as well. *by N***E on March 11, 2026* a nice toilet valve. I love the feature that keeps the bottom of the tank clean. It was easy to install, did not leak, and is still working great. ### ⭐⭐⭐⭐⭐ A True Money Saver! *by R***Y on May 26, 2011* An easy to install, quality made product that will save most users money through a lower water bill. To check your need for this unit: 1. Pour clean water into your toilet bowl to establish the level needed for a water seal in the base of the bowl. Make a pencil mark at this point. 2. Carefully remove the tank cover and observe the small tubing that is going into the larger over flow tube. 3. Flush the toilet and notice when the water level in the bowl reaches the point where you made the mark. All water flowing "into the bowl" after this point is wasted down the drain. You must observe the slight trickle in the bowl, and not confuse the water flow that is filling the main tank. 4. Now imagine if you had a valve on this small tube that you could adjust the flow, and only allow the proper amount of water needed to establish a seal. That's exactly what the MJSI HC660 does. The fully adjustable valve allows you to adjust the amount of water that goes through the small tubing. If you add the Hydro Clean Tube feature, it also keeps your tank clean on the inside. A very worthwhile product and is fully adjustable as far as water level in the tank goes and allows you to close off the water supply by the float lever, rather than the external valve, that usually starts leaking after being used. I have purchased and installed three of these units in my home and am totally satisfied with their performance and quality. Highly recommended. R. E. W. R. E. W. ### ⭐⭐⭐⭐ Reliable Fix for a Leaky or Slow Filling Toilet *by E***S on August 29, 2025* Reliable Fix for a Leaky or Slow Filling Toilet I installed the Danco HC660 toilet fill valve repair kit in one of my older toilets that had been taking forever to refill and occasionally kept running. The kit comes with the fill valve, float adjustment, and a refill tube, basically everything you need in one package. Installation was pretty straightforward—shut off the water, drain the tank, swap out the old valve, and adjust the height. The instructions were clear, and I appreciated that the design fits most standard toilets. Once installed, the toilet filled faster and more quietly than before. The height adjustment on the float is easy to fine-tune, so you can set the water level exactly where you want it. That said, the plastic construction feels a bit lightweight, so I wouldn’t expect it to last forever. I also noticed the locking nut at the bottom needs to be tightened carefully—over-tighten and you risk cracking it, too loose and you’ll have a small leak. Bottom line: This is a solid, affordable option to bring an old toilet back to life without calling a plumber. Just handle the plastic fittings with some care, and you’ll likely get a reliable fix for a few more years out of your toilet. ## Frequently Bought Together - Danco HC660 Toilet Fill Valve Repair Kit, Pack of 1, Blue White - Danco HYR270 Hydroright Water-Saving Dual Flush Valve with Push-Button Handle, Plastic, Chrome - Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, 1-Pack, Multicolor --- ## 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/4649221-hc660-toilet-fill-valve-repair-kit-pack-of-1-blue](https://www.desertcart.us/products/4649221-hc660-toilet-fill-valve-repair-kit-pack-of-1-blue) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-07-09*