In the early days of bathroom product design, the overflow hole was a standard feature on nearly every basin. The purpose was simple: when users forgot to turn off the faucet or when water drained too slowly, the overflow allowed excess water to return to the drain—clearly showing the benefits of a basin overflow hole in preventing flooding and water damage.

 

As home safety awareness increased, the overflow hole became widely viewed as a basic protective feature.

 

Why Are Many Modern Basins Designed Without an Overflow?

 

In recent years, more designers and hotels have adopted the modern bathroom basin without overflow. Several factors drive this trend:

 

1. Cleaner, Minimalist Appearance

A basin without an overflow offers smoother lines and a unified surface, ideal for contemporary minimalist bathrooms.

 

2. Easier to Clean, No Hidden Hygiene Problems

The overflow tunnel is narrow and deep, often trapping dirt and odors. This is one of the common disvantages of basins without overflow, but for many homeowners, removing this tunnel makes the basin easier to clean overall.

 

3. Practical for Countertop Vessel Basins

Many vessel basins are deep bowl structures, meaning the overflow would have limited function. Manufacturers often remove it to simplify the design.

 

4. Material Limitations of Stone Basins

A stone basin without overflow design is typically carved from a solid block. Since it’s impossible to drill a curved internal overflow channel through stone, this material naturally leads to no-overflow basin models.

 

5. Ceramic Basins Still Support Overflow

In contrast, ceramic basin with overflow design remains common because ceramic molds can easily incorporate an internal overflow channel during production.

 

So, Do You Need an Overflow?

 

Both options are suitable; it simply depends on your household and usage habits.

✔ Basins With Overflow: Safer

• Ideal for families—often considered the best design type for homes with kids
• Prevents accidental flooding
• Offers buffer time if someone forgets to turn off the faucet

✔ Basins Without Overflow: More Stylish

• A clean, hole-free surface
• Strong design identity in modern bathrooms
• Easier to wipe and maintain

 

Conclusion

 

Does a basin need an overflow?

The answer: It depends on your priorities—there’s no right or wrong.

• Prefer safety and peace of mind? Choose a basin with an overflow
• Prefer clean aesthetics and modern simplicity? Go with a no-overflow design

Either choice works well when paired with the right pop-up drain and accessories.

If you ever need basin overflow ring replacement, no-overflow pop-up drains, or other basin fittings, Jielin Plumbing provides a full range of solutions for both overflow and no-overflow basins.

Why Do You Need to Adjust the Toilet Fill Valve?

 

We often need to adjust the working water level when the toilet tank shows one of the following issues:

• Water level too high:

When the water level rises above the overflow tube of the flush valve, water keeps flowing into the overflow tube. The fill valve cannot reach the shut-off point and continues running, causing water waste and increasing household water bills.

• Water level too low:

The tank cannot store enough water to create a strong siphon in the toilet bowl. This results in weak flushing and poor waste removal.

• Height mismatch after installation or replacement:

When a new fill valve is installed, its height must match the old one. Both the main body and the float position should be adjusted to a similar level.

• Water-saving needs or different toilet designs:

Toilet tanks vary: some are tall and narrow, some are short and wide. You may need several adjustments to find the level that provides strong flushing power while saving water.

 

2. Two Common Types of Toilet Fill Valves

 

• Float-ball fill valve:

It uses a lever with a float ball to sense water level changes. As the float rises, it pushes the lever to stop water flow. However, it takes up a lot of space in the tank.

• Float-cup fill valve:

This modern, space-saving design is the mainstream option for most toilet tank systems today. The dual-float structure helps maintain stable refill speed and ensures quick shut-off when the water level is reached.

 

3. Preparations Before Adjusting the Fill Valve

 

• Turn off the water supply (angle valve).
• Remove the toilet tank lid.
• Confirm the type and structure of your fill valve.
• Locate the adjustment mechanism: screw, sliding rod, float clip, or adjustment tab.

 

4. How to Adjust the Toilet Fill Valve?

 

1) Float-cup Fill Valve (Mainstream Design)

• Coarse adjustment:

Most adjustable fill valves consist of two sections. Remove the locking clip or pin between them to raise or lower the valve height when the difference between actual and desired water level is large.

• Fine adjustment:

Locate the adjustment screw or lever near the float cup and turn it clockwise or counterclockwise to fine-tune the water level.

Note: Some designs adjust only the inner float height. After that, make sure the outer float is also set to the same height.

• Water level reference:

Fill until the water reaches the tank mark or sits about 1.5cm below the top of the overflow tube.

 

2) Float-ball Fill Valve (Traditional Design)

• Coarse adjustment:

Metal rods can be bent slightly to raise or lower the water level.

For plastic-rod designs, loosen the knob at the joint area to adjust the float height.

• Fine adjustment:

Some float balls can be screwed upward or downward to fine-tune the water level.

• Water level reference:

Same as above—tank mark or about 1.5cm below the overflow tube top.

 

5. How to Test After Adjustment

 

• Turn on the water supply and let the tank refill.
• Check if the water reaches the correct level marking.
• Inspect the fill valve base and connections for leakage.
• Listen to the refill sound: a good valve should stop instantly without dripping.
• Flush to confirm strong siphon and smooth waste removal in the toilet bowl.
• Run 3–5 cycles to ensure stable water level and proper shut-off.

 

6. Conclusion

 

1) Choose a height-adjustable and high-compatibility toilet fill valve.

2) Select quiet-refill and water-saving certified products for better performance and lower long-term water cost.

3) Jielin Plumbing Fill Valve Advantages:

• 3-year warranty and durable construction
• Multi-level height adjustment compatible with most toilet tank designs
• Quick shut-off technology for stable water level

4) Water level adjustment is simple and easy for most users.

5) Proper adjustment improves flushing power and reduces water waste.

6) Replace the fill valve when it becomes noisy, unstable, or difficult to adjust.

The dual flush toilet has become widely used for its water-saving and efficient performance. Compared with traditional single-button toilets, a two button toilet flush allows users to choose different flush volumes according to their needs, helping to conserve water and reduce waste.

However, many people still don’t know the difference between the two buttons. They often press both at the same time, which can still flush the toilet but eliminates the water-saving advantage of the design. So how should you properly use a dual flush toilet? Let’s take a closer look.

 

1. Understanding the Structure of a Dual Flush Toilet

 

A two button toilet typically has two buttons of different sizes:

• Small button (Half Flush): Used to flush liquid waste, usually with less water (around 3 liters).

• Large button (Full Flush): Used to flush solid waste, using more water (around 6 liters).

These two functions are controlled by a dual flush valve inside the cistern. Each button activates a different discharge path, allowing a balance between water conservation and flushing power.

 

2. How to Use the Two Buttons Correctly

 

 

Choose the right button for each use:

 

• For liquid waste, press the half flush button lightly to complete a small flush.

• For solid waste or when more paper is used, press the full flush button for a stronger flush.

 

 

Press firmly and release quickly:
Light or hesitant pressing may result in incomplete flushing or the button getting stuck.
Press the button evenly and release it quickly so that the flush valve can open and close properly.
Especially when using the half flush function, a quick release is important — if you hold it down too long, the system will perform a full flush instead, losing its water-saving effect.

 

 

Keep the buttons and cover clean:
Over time, limescale or dust can affect button sensitivity. Wipe the surface regularly with a damp cloth to maintain smooth and responsive operation.

 

3. What to Do If the Dual Buttons Don’t Work

 

If you notice:

• The button doesn’t respond or gets stuck

• The flush is weak or incomplete

• Water keeps running continuously

• Flushing stops immediately after releasing the button

These issues are often caused by an aged flush valve, sticking buttons, or worn seals.
You can try the following:

• Check if the button assembly is loose.

• Remove the tank lid and press or lift the dual flush valve manually to see if it functions properly.

• If damaged, replace it with a compatible flush button or dual flush valve kit of similar size.

4. Water-Saving Tips

 

The greatest benefit of a dual flush toilet is water efficiency. According to tests, proper use of a dual flush system can save thousands of liters of water each year. Learning how to use a dual flush toilet correctly not only reduces your water bills but also helps protect the environment.

In everyday use, the toilet flush handle is one of the most frequently operated parts of a toilet. Over time, it may become loose, broken, or stuck, which can prevent the toilet from flushing properly. Fortunately, replacing a toilet flush handle is quite simple — with just a few basic tools, the whole process can be completed within minutes.

This article will walk you through the detailed steps and precautions for toilet flush handle replacement.

 

1. Prepare Tools and Materials

 

Before starting, make sure you have the following items ready:

• New flush handle (Toilet Tank Handle): Confirm whether it’s a side-mount or front-mount type, and make sure it matches the hole size on your toilet tank.
• Wrench or pliers: These are useful for removing the old handle nut, especially if the nut has become tight or corroded over time.

 

2. Remove the Old Flush Handle

 

Turn off the water supply and empty the tank

Turn the shut-off valve clockwise to close the water supply, then press the handle to drain all the water from the tank.

 

Remove the tank lid

Carefully take off the ceramic or plastic lid and place it somewhere safe to avoid damage.

 

Detach the chain

Disconnect the chain attached to the handle lever and hang it temporarily on the overflow tube of the flush valve.

 

Loosen the mounting nut

The handle is usually secured inside the tank with a plastic nut. Note that this nut is reverse-threaded, meaning you’ll need to turn it clockwise to loosen it.

 

Take out the old handle assembly

Once the nut is loose, remove the handle and lever assembly from the outside of the tank.

 

3. Install the New Flush Handle

 

Insert the new handle into the hole

From the outside of the tank, insert the new handle into the original hole. Make sure it faces the correct direction (upward or sideways).

 

Tighten the mounting nut

From inside the tank, hand-tighten the nut counterclockwise. Do not overtighten, as it could crack the plastic nut.

 

Connect the lever to the flush chain

Attach the new handle’s lever to the flush chain inside the tank. The chain length should be moderate — if it’s too long, flushing may be weak; if too short, water may continuously leak.

A useful tip: pull the chain straight to compare with the lever length, then adjust the hook position before attaching it.

 

4. Test and Adjust

 

Turn on the shut-off valve and let the tank refill.

Press the handle to check if the flush is smooth and if the flapper closes completely.

If the flush is weak or the water keeps running, adjust the chain length or handle angle as needed.

 

5. Maintenance Tips

 

• Avoid pressing the handle too forcefully.
• Check the mounting nut periodically to ensure it’s secure.
• Replace the handle if it becomes rusty (for metal ones) or brittle (for plastic ones) to keep the flushing system working properly.

 

Conclusion

 

Replacing a toilet flush handle is a simple yet useful home maintenance skill. With just a few easy steps, you can restore your toilet to normal operation.

If you need to purchase high-quality toilet flush handles, flush valves, or fill valves in bulk, please contact Xiamen Jielin Plumbing Co., Ltd.

We provide reliable and durable sanitary solutions for customers around the world.

During daily use, many users encounter weak flush power, high water usage, incomplete waste removal. These issues often signal that the flush valve inside the toilet tank requires a new water volume setting. Although toilet structures vary, most household toilets share similar logic for flush volume adjustment. This guide explains core principles, adjustment methods, and practical checks that help complete the process in 2–3 minutes.

 

1. Why Adjust Flush Valve Water Volume?

 

You may need to adjust flush volume in the following situations:

l  Weak flush performance：Low water level or low discharge volume may reduce siphon strength.

l  High water consumption：Toilet tank drains unnecessary amounts during every flush.

l  New flush valve replacement：Height difference between old and new valve requires a new water level setting.

l  Water saving demand：Half flush and full flush need minimum water while still achieving effective flushing.

 

2. Key Principles That Influence Flush Volume

 

Flush volume depends on several internal elements:

l  Overflow tube height：Controls maximum water line inside the tank.

l  Half flush float height：Controls half flush water volume.

l  Full flush adjustment plate opening：Controls full flush water volume.

 

3. How to Adjust Flush Valve Water Volume?

 

1）Adjust Overflow Tube Height

 

Overflow tube height sets maximum tank water level, which defines maximum available flush volume.

This method becomes the simplest adjustment for single flush push button flush valves.

For canister-type flush valves, this method works together with additional components for finer adjustment.

 

2）Adjust Half Flush and Full Flush Water Ratio

 

Most canister-style dual flush valves support independent adjustment for half flush water volume and full flush water volume.

 

(1) Half Flush Adjustment

 

Half flush adjustment has two methods:

direct movement for the half flush float height, or indirect adjustment through a top knob on the flush valve.

l  Half flush float moves upward → half flush water volume becomes lower

l  Half flush float moves downward → half flush water volume becomes higher

 

(2) Full Flush Adjustment

 

Full flush adjustment usually relies on an adjustment plate located at the bottom area for the flush valve.

This adjustment plate controls the release speed inside the full flush chamber.

When water inside the full flush chamber drains out completely, the full flush float drops under gravity and shuts the outlet, ending the full flush.

Therefore, the release speed inside the full flush chamber decides full flush duration:

l  Longer duration → higher full flush water volume

l  Shorter duration → lower full flush water volume

When the opening window controlled by the full flush adjustment plate becomes larger, full flush water volume becomes lower.

When the opening window becomes smaller, full flush water volume becomes higher.

 

4. How to Confirm Best Flush Volume?

 

Perform multiple flush tests:

l  A small paper group inside the toilet bowl drains smoothly

l  Waste removal completes in one flush

l  Half flush meets water saving demand

l  No overflow and no leakage inside the tank

If all checks pass, the flush valve reaches an optimal setting.

 

5. Summary

 

Flush valve adjustment focuses on three essential steps:

l  Set overflow tube height around 2–3 cm below tank rim

l  Adjust half flush and full flush opening sizes

l  Raise or lower water level to control flush strength

A short adjustment process upgrades flush performance and improves water efficiency for everyday use.

I.Poor design, difficult to use

Excessive residue at the bottom of the bottle: Especially for thick lotions, creams, or foundations, the non-pressable bottle design results in a large amount of product residue remaining on the bottle walls and bottom, causing waste.

Dropper too short: The dropper for serums is not long enough to reach the last bit of product at the bottom of the bottle.

Insufficient pump pressure: For airless bottles, improper pressure may prevent the product from being fully dispensed, or the pump may malfunction from the start.

Inadequate opening design: Cream jars may have openings that are too narrow, making it difficult to insert fingers; cream jars may lack a spatula or a fixed spatula, leading to contamination; dropper openings may be too large, resulting in excessive dispensing at once.

Mismatch between capacity and application: Small-capacity products (e.g., 10ml serums bottles) may have excessively large packaging, while large-capacity lotion bottles may be too heavy; travel-sized products may lack a convenient and airtight design.

II.Unstable packaging quality affects usability.

Leakage Issues: Poor packaging sealing, especially after express delivery or travel, leads to product leakage, causing contamination and loss. This is one of the most frequent consumer complaints.

Pump Head/Sprayer Nozzle Damage: After a few presses, the nozzle may fail to spring back, break, or spray unevenly.

Loose or difficult-to-close cap: A cap that is difficult to unscrew can cause product evaporation, oxidation, or spoilage.

Peeling electroplating/paint: The electroplating or paint on the cap or bottle peels off quickly during daily use, making it look cheap and unsightly.

III.A difference in texture.

The online promotional images are beautiful, but the actual packaging materials, colors, and workmanship are vastly different, feeling plasticky and lacking a premium feel, leading to a disappointing experience.

The cheapness is quite obvious: the glass bottle is fragile and easily scratched, the plastic bottle has a rough texture, and the metal parts (such as the pump head and cap) are prone to oxidation and discoloration.

Design homogenization: Following trends and popular designs (such as square bottles and frosted bottles), lacking brand recognition; jarring color combinations, blurry/easily detached logos.

Excessive packaging waste: Too many layers in gift boxes (cumbersome to open), redundant fillers, and mostly non-recyclable materials, contradicting environmental protection requirements.

IV.Lack of details

Unclear labeling information: Ingredient list font is too small, expiration date/batch number is obscured (difficult to find), and there are no clear usage instructions (such as precautions for airless bottle use).

Safety oversights: Glass bottles lack anti-scalding/anti-slip design, making it easy to burn hands when pouring hot oil products; spray bottles have unstable pressure and are prone to splashing; there is a risk of child contact, and no safety locks are present.

Compatibility issues: Packaging materials conflict with product formulas (such as acidic essences corroding plastic bottles, or essential oil products leaking), leading to product deterioration or packaging damage.

V. Sustainability Issues

Environmental Commitments and Actions: The brand promotes environmental protection concepts, but the packaging itself uses various composite materials that are difficult to separate and recycle, or does not offer replacement options.

Lack of Durability and Easily Damaged: Accessories such as pump heads and caps have short lifespans (malfunctioning after only a few uses), rendering the entire bottle unusable and resulting in waste.

In discussions about sustainable packaging, the word "recycling" has long been dominant. However, for forward-thinking brands, true environmental protection begins at the source.Reducing the environmental footprint of packaging from its very inception is key to achieving deep sustainability. Airless plastic bottles are synonymous with efficiency and hygiene in the skincare and cosmetics industry.

Lightweight Design and Material Innovation

Lightweighting is far more than simply "reducing the amount of material used." In addition to recycling, reducing the environmental burden from the very beginning of packaging is equally important.

Lightweight engineering:

Through precise control of wall thickness and structural optimization, modern environmentally friendly plastic bottles can be made as lightweight as possible while maintaining strength and functionality. While ensuring a robust bottle body and stable pump system operation, we have successfully reduced the weight of a single package by up to 30%.This means that energy consumption and carbon emissions are reduced at every stage of raw material extraction, transportation, and production. Less raw material usage directly reduces carbon emissions in oil extraction and resin production processes.At every stage of logistics and transportation—from our factory to your warehouse and finally to the consumer—lighter packaging means that each truck or plane can carry more product, thereby significantly reducing energy consumption and carbon emissions per unit of product, and reducing the carbon footprint of the brand value chain.

Applications of materials science:

PCR plastic:

Using post-consumer recycled plastics is central to recyclable packaging. Our sustainable airless bottles can be fitted with high-quality PCR materials (such as rPET, rPP), derived from rigorously sorted, cleaned, and processed post-consumer plastic bottles (such as water bottles and cosmetic bottles), and then recycled using cutting-edge technology into high-quality granules that meet cosmetic packaging requirements.Choosing PCR material means you are directly involved in the effort to "rescue" waste from landfills and oceans, reducing reliance on fossil fuels and promoting the formation of a closed-loop materials economy.

Designed with a single recyclable material:

We are committed to optimizing the design to ensure that all parts, such as the bottle body and pump head, are made of the same plastic material as much as possible, or to design a structure that allows for easy and quick separation. This greatly increases the likelihood that the entire packaging can be successfully recycled and reused as a high-quality new product at the end of its life cycle, ensuring the ultimate realization of its environmental value.

When it comes to kids'personal care items, parents look for safety, ease of use, and fun. Foaming bottles have gained attention in this space, but do they really fit the needs of children and their caregivers ? Let's explore.

 

 

Safety First: A Key Consideration

 

Foaming bottles designed for kids must meet strict safety standards. The best options use BPA-free plastic that resists cracks and leaks. Kids often drop or squeeze containers, so durable materials matter. Parents can trust that well-made foam pumps prevent accidental spills, keeping bathrooms and bedrooms cleaner. This reliability makes foaming bottles a practical choice for busy families.

 

Ease of Use for Little Hands

 

Children struggle with traditional bottles that require strong squeezes. Foaming bottles solve this by releasing foam with light pressure. Kids can easily dispense the right amount, reducing waste and mess. This independence encourages good hygiene habits, like washing hands without adult help. Brands that prioritize child-friendly design find foaming bottles boost customer satisfaction.

 

Custom Options to Appeal to Kids

 

Bulk custom color foam pump bottles let brands create eye-catching designs. Bright hues and playful shapes attract children, making daily routines more enjoyable. Customization also helps parents quickly identify products meant for kids, avoiding mix-ups with adult items. When done well, these designs balance fun with functionality, turning ordinary bottles into tools that make care routines easier.

Foaming bottles work well for kids'products when safety and usability guide their design. They offer convenience for parents and independence for children, with customization options that add value. For brands targeting families, foaming bottles deserve a spot in their product lines.

In the cosmetics industry, spray bottles are widely used for packaging. However, a question that often arises is: Are these spray bottles recyclable? Let's delve into this and explain the materials involved.

 

 

What Materials Are Spray Bottles Made of ?

 

Spray bottles for cosmetics packaging rely on specific plastics. PET (polyethylene terephthalate) is a top choice. It’s clear, lightweight, and strong, making it ideal for holding various liquids. HDPE (high-density polyethylene) is another common material. It’s more opaque and flexible, often used for products that need a sturdier container. Some bottles also use PP (polypropylene), which resists heat well.

 

Can These Materials Be Recycled ?

 

Most spray bottle materials can be recycled, but it depends on the type. PET and HDPE are highly recyclable. Recycling facilities easily process them, turning old bottles into new plastic products. PP is recyclable too, though not as widely accepted as PET or HDPE. The key is to check local recycling guidelines. Always empty and rinse the bottle first—residues can ruin the recycling process.

 

The Role of Eco Spray Bottles

 

Eco spray bottles are gaining popularity. They use recycled materials or are designed for multiple uses. Manufacturers make them from recycled PET or HDPE, reducing the need for new plastic. Reusable eco spray bottles also cut down on waste, as they can be refilled many times. Choosing these options helps brands meet sustainability goals.

In short, most spray bottles are recyclable if made from PET, HDPE, or PP. Knowing the material and following local recycling rules matters. And with eco spray bottles on the market, the cosmetics industry moves toward greener packaging.

Can cream bottles seamlessly serve both face and body products? This question lingers in the minds of many in the cosmetics industry, and its answer holds significant implications for product packaging strategies.

 

 

Material Matters: A Common Ground

 

The key lies in the material of the cream bottle. High quality plastics like PET and HDPE are non - reactive and safe. They don’t interact with the active ingredients in either face serums or body lotions. This means a cream bottle made of these materials can hold facial moisturizers and body butters alike without compromising product integrity. Brands can rely on such bottles to keep both types of products fresh.

 

Design Adaptability: Form Follows Function

 

Smart design makes versatility possible. A well - designed cream pump bottle, for example, works perfectly for both areas. The pump controls dosage, preventing waste whether you’re applying a small amount to your face or a bit more to your arms. Wide - mouth bottles, too, let users scoop out product easily, fitting both facial and body application needs. The right design bridges the gap between face and body use.

 

Practical Tips for Dual Use

 

While cream bottles can do double duty, some tips help. Clean the bottle thoroughly when switching products to avoid cross - contamination. Choose sizes that match usage—smaller bottles for travel - sized face creams, larger ones for body products. These simple steps ensure the bottle serves both purposes effectively.

In short, cream bottles can absolutely work for both face and body products. With the right material, design (like a cream pump bottle), and proper care, they offer a flexible packaging solution for cosmetics brands.