Core Functions and Application Scenarios of the Product
Pipeline Crossing Handling
When cold and hot water pipes or pipelines in different directions need to cross, the cross-over four-way joint enables two pipelines to achieve "three-dimensional crossing" on the same plane, avoiding space occupation and installation difficulties caused by direct overlapping. For instance, in the water and electricity layout of bathrooms or kitchens, when two pipelines need to cross vertically, using a cross-over four-way joint can simplify the construction process.
Flow Optimization
Compared with traditional cross-over bends, the large-diameter design of the cross-over four-way joint significantly improves water flow efficiency. For example, Rifeng's products reduce water flow resistance by more than 50% through a large-radius streamlined structure, increasing water flow by 25%, while Yatong's products boost flow by 70%. This design is particularly suitable for scenarios sensitive to water pressure, such as large apartments or high-rise residences.
Space Saving
Traditional cross-over bends require raising the pipeline or cutting grooves in the ground, while the cross-over four-way joint, with its parallel and bend-free design, directly reduces the superimposed height of the pipeline, saving floor space. For example, when laying floor heating or concealed pipelines, the thickness of the ground leveling layer can be reduced.
Structural Features and Technical Details
Internal Isolation Design
Some brands (such as Rifeng) adopt a physical isolation structure inside their cross-over four-way joints to separate cold and hot water flows and prevent mixing. For example, the internal channels are divided into upper and lower paths, each going its own way, ensuring independent transportation of cold and hot water. This design addresses the common misconception among users that "crossing at right angles leads to water temperature mixing".
Material and Craftsmanship
High-quality cross-over four-way joints are made of imported PPR raw materials (such as South Korea's Hyosung material) and are integrally formed through hot-melt technology, with a pressure resistance rating of 1.6-2.5MPa and a temperature resistance range of long-term use at 70℃ and short-term use at 95℃. For example, Jinde's products enhance overall strength through reinforcing rib design, while Weixing's hot-melt joints adopt precise positioning for better sealing performance.
Specification Compatibility
Common specifications include 4-inch (20mm), 6-inch (25mm), 1-inch (32mm), etc., which need to match the outer diameter of the pipe. For example, Liansu's cross-over four-way joints offer multiple sizes from 20-63mm to meet different pipe diameter requirements.
Installation Points and Precautions
Hot-Melt Connection Specifications
Temperature Control: The hot-melt machine needs to be preheated to around 260℃; in winter, it should be appropriately increased by 5-15℃ to ensure the welding effect.
Operation Steps: Pipes and fittings must be clean and dry, the cut end should be vertical, insert quickly without rotation after heating, and cool for more than 5 minutes.
Welding Point Management: The cross-over four-way joint needs to connect 4 interfaces, which is 2 more welding points than the cross-over bend, so special attention must be paid to avoid false welding. For example, Weixing's hot-melt joints reduce the risk of water leakage through standardized processes.
Layout Design Suggestions
Priority should be given to concealed pipelines to avoid affecting the appearance when installed exposed.
Cold and hot water pipes must be strictly distinguished; hot water pipes are marked with red lines and cold water pipes with blue lines to prevent insufficient pressure resistance due to misuse.
Testing and Acceptance
After installation, a water pressure test is required. The test pressure is 1.5 times the working pressure (cold water ≥ 1.0MPa, hot water ≥ 1.5MPa), and the pressure is maintained for 30 minutes without leakage before acceptance.
Frequently Asked Questions
Q: Will the cross-over four-way joint affect water pressure?
A: High-quality products can reduce pressure loss through large-diameter design. For example, Rifeng's products reduce pressure loss by more than 50% compared with traditional elbows.
Q: How to avoid water leakage at welding points?
A: Strictly control the hot-melt temperature and time, use matching brand fittings, and conduct a pressure test after installation.
Summary
Through structural innovation and flow optimization, the PPR cross-over four-way joint has become an important accessory in modern home decoration water and electricity renovation. Its core value lies in simplifying construction, saving space, and improving water flow efficiency, making it especially suitable for scenarios with high requirements for installation accuracy and user experience. When choosing, it is necessary to comprehensively consider brand characteristics based on pipe diameter, pressure requirements, and budget, and follow specifications during installation to ensure system reliability.
Hot Tags: ppr cross-over four-way joint, China ppr cross-over four-way joint manufacturers, suppliers, factory, Cold Water Pipe Fittings, Ppr Fittings, Ppr Fittings For Ppr Pipe, Ppr Pipe Fittings, PPR Plumbing Fittings, Ppr Water Pipe Fittings
