FAQs of Water Purifier Filter Valve

1. Can the water purifier filter valve be used for cold and hot water lines?

Absolutely not. Plumberstar water purifier filter valves are only for cold water pipelines. You must not connect them to hot water systems.

The valve body is made of brass or stainless steel. It can handle hot water temperatures structurally. But the internal filter parts cannot resist high heat. This is the main reason it cannot be used in hot water lines.

Filter element: PP cotton, activated carbon, UF membrane, and RO membrane are all plastic materials. They are very sensitive to high temperatures.
Connecting the filter valve to hot water will cause permanent damage.

• Filter softens and deforms, water bypasses directly, and filtering fails completely
• UF and RO membranes are destroyed by heat, cannot be repaired, and must be replaced
• Sealing rings age and deform at high temperatures, causing leaks or even bursting
• Activated carbon adsorption drops sharply, purification effect is greatly reduced

2. What is the filtration accuracy and flow range of the purifier filter valve?

The filtration precision covers 5μm, 10μm, 20μm, 50μm and 100μm. It suits different water purification scenes. Conventional working flow rate: DN15 model 8-12L/min, DN20 model 15-20L/min, DN25 model 25-30L/min. The working pressure is 0.1-1.0MPa. With the same filtration precision, the Plumberstar filter element has a 35% larger flow area than its competitors. The flow rate is more stable. The long-term use flow attenuation rate is ≤5%.

3. What is the sewage discharge method of the water purifier filter valve?

The valve uses a manual quick-open sewage design. A sewage outlet and sewage valve are built into the bottom of the valve body. By turning the sewage handle about 30°, sewage discharge starts. Some models also support automatic sewage with timing control. These are suitable for large commercial water purification systems. Compared with competing products, traditional filter valves usually need to be taken apart and cleaned. This process takes about 5–10 minutes. Plumberstar’s design improves sewage efficiency by more than 80%.

4. What’s the difference between ultrafiltration and RO water purifiers?

Plumberstar water purifier filter valves work with two kinds of water purification systems: ultrafiltration (UF) and RO reverse osmosis. These two systems are very different in filtration principle, precision, water quality, and system pressure. So we have designed special filter valves for UF and RO systems separately. This makes the systems run safely, stably, and durably.

Ultrafiltration water purifiers use UF membranes for physical filtration. The precision is about 0.01–0.1 microns. The filtered water keeps natural minerals and is similar to mineral water. It is mostly used for daily water, washing vegetables, and cleaning. If the original water quality is good, it can also be drunk directly.

RO water purifiers use RO membranes. Their filtration precision can reach 0.0001 microns. Reverse osmosis needs to work under high pressure. They can effectively remove heavy metals, scale, antibiotics, pesticide residues, bacteria, viruses, and soluble salts. It is mainly used for scenarios that need very high water quality, such as direct drinking, making milk, making tea, and cooking soup.

From Fresh Water Systems

5. Can the water purifier filter valve’s outlet connection be customized?

Absolutely. Plumberstar water purifier filter valves support customized outlet connections. Just tell us your water purification equipment’s structural design, pipeline layout, installation space, and interface specs. We’ll adjust flexibly to make sure it matches your whole system perfectly and is easy to install.

Customization Process Steps: You can provide design drawings, physical samples, or specific interface parameters. Our Plumberstar engineering team will do a technical evaluation. Then we’ll give you a customization plan and 3D renderings for you to confirm. Once you approve the plan, we’ll make the first sample. We’ll fully test its interface size, sealing performance, and installation adaptability.

Quality and Safety Assurance: Every customized outlet filter valve goes through 100% pressure resistance and tightness tests before leaving the factory. This ensures customized products have the same quality.

6. Can the packaging of the water purifier filter valve be customized?

Plumberstar water purifier filter valves offer full packaging customization. We meet your needs for different brand positioning, sales channels, and export markets.

• You can choose different packaging solutions based on product features and transportation needs. These include white card boxes, color boxes, kraft paper boxes, color gift boxes, blister packaging, neutral packaging, and export-specific outer boxes.
• We’ll customize the right packaging size for you. We base it on the filter valve model, how many products fit in each box, and the accessory combination. This reduces internal gaps, increases packing density, and cuts down on damage and logistics costs during transport.
• We can print your brand logo, product name, model, technical parameters, usage diagrams, warning instructions, certification marks, barcodes, and QR codes on the packaging. This meets your brand display, market promotion, and compliance needs.
• We can add foam, sponge, blister inner trays, or paper card positioning structures based on the product design. This ensures no shaking, scratching, or damage during transport. We also support packing accessories together—like instruction manuals, certificates of conformity, sealing gaskets, and installation joints. This way, you get a one-stop shipment.

7. What is the competitive advantage of water purifier filters?

Plumberstar water purifier filter valves meet all requirements for household and commercial water purification equipment. This includes safety, durability, and easy installation compatibility.

• The valve body and all water-contacting parts are made of high-standard lead-free brass or eco-friendly engineering plastic. This effectively prevents heavy metal leakage and fully meets drinking water hygiene and safety standards. The sealing parts use food-grade safe materials like silica gel and EPDM.
• Inside the filter valve, we use a large-flow, low-resistance flow channel design. It effectively reduces pressure loss in the water purification system, ensuring sufficient water output and that the equipment runs efficiently and stably. The internal fluid structure is optimized for filtration and reversing.
• The product uses a double-sealing ring and a high-precision matching structure. It forms full sealing protection from the interface to the valve core. It can handle frequent start-stop and water pressure changes in the water purification system easily. There’s no leakage even after long-term use, and it has better overall stability and a longer service life.

8. How does the compact design benefit purifier manufacturers?

The compact valve design uses less primary material, such as stainless steel and brass, which are widely used in Plumberstar products. Because of this, raw material costs are lower.

This structure also improves material use during production. At the same time, the smaller size makes the valve easier to assemble on automated production lines. Assembly becomes faster and more stable. For water purifier manufacturers, this means lower component costs.

In addition, Plumberstar filter valves use a compact design with standardized interfaces. As a result, manufacturers can connect the valve to various pipelines and control systems without altering the internal structure of their products.