--- product_id: 281396752 title: "Doublelife (18cm, Connected) - White 18cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair" brand: "doublelife" price: "Β₯13866" currency: JPY in_stock: true category: "Doublelife" url: https://www.desertcart.jp/products/281396752-doublelife-18cm-connected-white-18cm-height-water-tank-connected-dual store_origin: JP region: Japan --- # 2.3L/S drainage rate Universal fit for 65-75mm drain holes Adjustable dual flush volume Doublelife (18cm, Connected) - White 18cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair **Brand:** doublelife **Price:** Β₯13866 **Availability:** βœ… In Stock ## Summary > 🚽 Upgrade your flush game β€” save water, save the planet, and never settle for leaks! ## Quick Answers - **What is this?** Doublelife (18cm, Connected) - White 18cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair by doublelife - **How much does it cost?** Β₯13866 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/281396752-doublelife-18cm-connected-white-18cm-height-water-tank-connected-dual) ## Best For - doublelife enthusiasts ## Why This Product - Trusted doublelife brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Effortless Installation:** Designed for quick, tool-friendly setup with clear alignment guides and adjustable trigger rods to fit your toilet tank perfectly. - β€’ **Leak-Proof Silicon Seal:** Engineered with a premium silicon sealing sheet ensuring zero leaks and long-lasting reliability. - β€’ **Universal Compatibility:** Seamlessly replaces valves for top brands like TOTO and KOHLER, fitting 65-75mm drainage holes with ABS and stainless steel durability. - β€’ **Optimized Water Efficiency:** Achieve a residual water level as low as 35mm on full flush, maximizing drainage while minimizing water waste. - β€’ **Precision Dual Flush Control:** Customize water usage with easy push-pull buttons for full or half flush, saving water without sacrificing performance. ## Overview The Doublelife Connected Dual Flush Fill Toilet Cistern Valve is a high-performance, adjustable drain valve designed for one-piece and split toilets with 65-75mm drain holes. Crafted from durable ABS plastic and 304 stainless steel, it offers a 2.3L/S drainage rate with customizable full and half flush options. Its advanced silicon sealing sheet guarantees a leak-free experience, while compatibility with major brands like TOTO and KOHLER ensures a seamless replacement. Easy to install and built for water efficiency, this valve elevates your bathroom’s functionality and sustainability. ## Description Features: 1. Efficient and water-saving, gentle and professional, which can effectively improve your toilet flushing performance; 2. Easy to use, highly adaptable, you will have a great experience; 3. Toilet drain valve: This is a great toilet tank inlet drain valve, exquisitely made and is an excellent replacement accessory for you. 4. Applicable brands: Replacement for TOTO, Replacement for KOHLER and other brands of one-piece side toilet tanks Note: Please measure the holes and height of the toilet and the diameter of the drain pipe before purchasing. Please confirm the information before purchasing: 1. Is it a one-piece toilet or a split toilet. 2. Should the toilet button be pressed on the top, side or front. 3. The height of the toilet tank of the side button must be above 18CM, and the diameter of the side button hole is 1.8-2.5CM round or square hole with a diameter of 1.8-2.5CM; if the key hole is on the top surface, the height of the water tank needs to be above 26CM! The diameter of the top key hole is within 3.8CM! Installation method: 1. Measure whether the height of the protruding part in the middle of the water tank is uniform to the edge. Please measure it normally. 2. Measure the size of the drain hole of the water tank. 3. Lift the rotary drain valve upward and remove the main body. 4. Tighten the screws to fix the base. 5. Align the groove position and insert it, rotate it to about 90℃, and the installation is completed. How to choose a suitable toilet valve? 1. Distinguish toilet type: First, observe and confirm whether the toilet type in your home is split or one-piece (for specific methods of distinguishing, please refer to "The difference between one-piece toilet and split toilet"). 2. Distinguish the type of toilet drain valve and determine the required toilet drain valve (for specific methods of distinguishing, please refer to "How to distinguish toilet drain valve"). Different types of toilets can only match the corresponding type of toilet valve, split toilet can only match the split toilet drain valve, and one-piece toilet can only match the one-piece toilet drain valve. 3. Measure the size of the original drain valve and toilet tank (see "How to choose the correct toilet drain valve by measuring the toilet tank size"), and try to choose a new drain valve with a size similar to the original drain valve. 4. After determining the toilet type, drain valve type and drain valve size, you can choose to purchase the corresponding toilet drain valve. The difference between a one-piece toilet and a split toilet One-piece toilet: The biggest feature of a one-piece toilet is that the water tank and the bucket body are integrated into molding, so from the appearance, the water tank and the bucket body of the one-piece toilet are connected together. Split toilet: The split toilet is just the opposite. The water tank and the bucket body are poured separately, and after being fired, they are bonded together. Therefore, from the appearance, the water tank and the bucket body have obvious joints and can be disassembled separately. How to distinguish toilet drain valves? How to install it? The one-piece toilet drain valve is installed with a u-type hook, and the split-type drain valve is installed with a bottom thread Note: After the toilet valve is installed intact, the toilet can drain water normally, but the toilet will continue to leak water. You need to check whether there is any problem with the water inlet valve or check whether there is any problem with the sealing ring of the drain valve. How to distinguish between full drainage, half drainage button: If you look closely at the drain valve button, you will find that the two buttons have circular and semicircular hollows, respectively. The circular represents full drainage, and the semicircular represents half drainage. Full drainage: large drainage Semi-displacement: Smaller displacement How to adjust the drainage The drainage volume of the drainage valve can be adjusted separately by the blue and white push and pull buttons on the drainage valve. Push the blue button upward to reduce the displacement, otherwise the displacement will increase How to measure toilet tank size Measure the diameter of the drain hole: After removing the original drain valve, use a caliper to measure the aperture of the drain hole of the outlet tank and the drain hole of the original drain valve. Measure the height of the water tank: Place the tape measure horizontally along the inside of the water tank and pull it to the highest point of the water tank to get the height of the water tank. Notice: 1. When selecting a drain valve, make sure that the height of the water tank is equal to the height sum of the drain valve and the water tank button. When actually choosing, the water tank height can also be slightly smaller than the sum of the drain valve and the water tank button (this problem can be solved by adjusting or cutting the trigger lever of the water tank button), but the water tank height cannot be greater than the sum of the drain valve height and the maximum length of the water tank button, otherwise the water tank button will not be able to trigger the drain valve or the longer water tank button must be replaced. 2. Ensure that the drain hole diameter of the drain valve (i.e., the inner diameter of the sealing ring) must be equal to the water tank hole diameter. What situations do I need to adjust the water tank button? How to adjust and cut? After installing the new drain valve, if the water tank cover cannot be fully covered or the water tank button is pushed out, it may be caused by the long trigger rod of the water tank button. At this time, you should rotate and adjust the length of the trigger rod to ensure that the button is installed in the correct position. If the push button after installation cannot flush water, it may be caused by the short trigger rod. At this time, the long trigger rod can be adjusted to the drain button that can contact the drainage button above the drain valve; if the trigger rod is adjusted to the longest, it is still impossible to flush water, the water tank button with a longer trigger rod needs to be replaced to ensure that the trigger rod can contact the drainage button above the drain valve or replace the drain valve with a higher height. If the toilet leaks after installing the drain valve (water will also be discharged without pressing the button), please follow the steps below: 1. Please first check whether the floating valve switch of the water inlet valve is damaged, causing water to keep inflowing water in the water tank. If you find a problem, you can consider replacing the float valve component. 2. Please check whether the washers at the bottom of the drain valve are misaligned or damaged. The gasket at the bottom of the drain valve is usually used to seal to prevent water from flowing out of the tank. If the gasket is not in the correct position or is damaged, it can lead to water leakage. Make sure the washers are intact and properly installed at the bottom of the drain valve. ## Features - Full drainage, half drainage can be adjusted (silicon sealing sheet, good sealing effect, never leaking) - Product Description: Suitable for drainage holes of 65mm -75mm - Drainage rate: 2.3L/S - Residual water level: semi-drainage residual water level is 90-110mm, and full drainage residual water level is 35-50mm. - Color: White Material: ABS plastic + 304 stainless steel U-shaped hook - Dimensions: Washer Outer Diameter: 85mm/3.35 inches, Height: 180mm/7.09 inches (excluding base height), Total Width: 118mm/4.65 inches, Base Diameter (excluding washers): 65mm/2.56 inches ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07G9XMQ9V | | Brand | Doublelife | | Brand Name | Doublelife | | Connector Type | Compression | | Exterior Finish | Abs,Plastic,Stainless Steel | | Exterior finish | Abs , Plastic, Stainless Steel | | Inlet Connection Size | 2.56 Millimeters | | Inlet Connection Type | Compression | | Inlet connection size | 2.56 Millimeters | | Inlet connection type | Compression | | Manufacturer | Doublelife | | Manufacturer Part Number | M8HNJP0809021 | | Material | Acrylonitrile Butadiene Styrene (ABS) | | Material Type | Acrylonitrile Butadiene Styrene (ABS) | | Model Number | M8HNJP0809021 | | Number of Ports | 2 | | Outlet Connection Size | 2.82 Millimeters | | Outlet Connection Type | Compression | | Outlet connection type | Compression | | Size | 20.5cm | | UPC | 720355661649 | | Unit Count | 1.0 Count | | Valve Type | drain valve | ## Product Details - **Material:** Acrylonitrile Butadiene Styrene (ABS) - **Brand:** Doublelife - **Exterior Finish:** Abs,Plastic,Stainless Steel - **Number of Ports:** 2 - **Valve Type:** drain valve - **Manufacturer:** Doublelife - **UPC:** 720355661649 ## Images ![Doublelife (18cm, Connected) - White 18cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair - Image 1](https://m.media-amazon.com/images/I/61P92qLulhL.jpg) ![Doublelife (18cm, Connected) - White 18cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair - Image 2](https://m.media-amazon.com/images/I/81OACPHeOxL.jpg) ![Doublelife (18cm, Connected) - White 18cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair - Image 3](https://m.media-amazon.com/images/I/61MsYZT0xoL.jpg) ![Doublelife (18cm, Connected) - White 18cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair - Image 4](https://m.media-amazon.com/images/I/612MInctnqL.jpg) ![Doublelife (18cm, Connected) - White 18cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair - Image 5](https://m.media-amazon.com/images/I/71xT2az02NL.jpg) ## Frequently Bought Together - White 20.5cm Height Water Tank Connected Dual Flush Fill Toilet Cistern Inlet Drain Valve Repair - Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, 1-Pack, Multicolor - Dual Flush Valve Replacement Button --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/281396752-doublelife-18cm-connected-white-18cm-height-water-tank-connected-dual](https://www.desertcart.jp/products/281396752-doublelife-18cm-connected-white-18cm-height-water-tank-connected-dual) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-07-16*