Building Water Supply and Purification Equipment - Brief Introduction

Building water supply and purification equipment is a customized integrated water treatment system for various buildings such as residential complexes, commercial malls, office buildings, and hotels. Its core functions are to ensure stable water supply and enhance water quality safety. It not only meets the water needs of people in the building for daily life, office work, and commercial activities (e.g., washing, cleaning, air conditioning water replenishment) but also eliminates issues such as impurities, odors, and microorganisms in raw water (mainly municipal tap water) through purification treatment. Ultimately, it provides water quality that meets national drinking water standards or specific functional requirements.

This equipment system is not a single device but integrates four modules: "water supply power, water storage buffer, water purification, and intelligent control". It can be flexibly configured according to building height, user scale, and water usage scenarios (e.g., ordinary domestic water, direct drinking water, special commercial water), balancing practicality, energy efficiency, and safety.

I. Core Component: Water Supply System - Ensuring "Sufficient Water and Stable Pressure"

The water supply system is the "power core" of building water use, focusing on solving problems such as "insufficient water pressure in high-rise buildings, water cutoffs during peak water usage, and secondary contamination of stored water". It mainly includes the following key equipment:

• Water Storage Equipment: Mostly uses food-grade stainless steel water tanks, PE water tanks, or FRP (fiberglass-reinforced plastic) water tanks to store municipal tap water. These tanks buffer the supply-demand contradiction during peak water usage (e.g., morning, noon, and evening washing peaks) and prevent fluctuations in municipal pipe network pressure from directly affecting building water use. Some high-end buildings are equipped with "water tanks for classified storage" to store domestic water and raw water for direct drinking separately, preventing cross-contamination.
• Pressure Boosting Equipment: The core is "variable-frequency constant-pressure water supply equipment". It adjusts the pump speed in real-time through a frequency converter and automatically matches the water supply pressure according to the water consumption in the building (e.g., higher pressure is required for high floors, and pressure reduction is needed for low floors). This avoids energy waste caused by traditional constant-speed pumps operating at full capacity even when demand is low, while ensuring stable water pressure at water points such as faucets and showers on all floors (no sudden changes in water flow). For super high-rise buildings (e.g., over 30 floors), a "zoned water supply system" is also adopted, dividing the building into low, medium, and high zones with independent pressure boosting for each zone to further improve water supply stability.
• Pipe Network and Auxiliary Equipment: Includes the internal building water supply pipe network (mostly made of PPR or stainless steel, which is corrosion-resistant and less prone to scaling), check valves (to prevent water backflow and contamination), pressure sensors (to monitor water pressure in real-time), and backup water pumps (to handle main pump failures and ensure emergency water supply). These form a complete water supply chain covering "water storage - pressure boosting - transportation - monitoring".

II. Core Component: Purification System - Ensuring "Clean and Safe Water"

The purification system addresses issues that may exist in municipal tap water, such as "residual chlorine, pipe rust, colloids, and excessive microorganisms". It is divided into two categories—"domestic water purification" and "direct drinking water purification"—based on water usage scenarios, with common equipment as follows:

• Pretreatment Equipment: Serving as the "first line of defense" in purification, it is mostly equipped with multi-media filters (to remove large-particle impurities such as sediment and rust), activated carbon filters (to adsorb residual chlorine, odors, and some organic matter, improving water taste). In areas with hard water, water softening equipment is also added (to remove calcium and magnesium ions, preventing scaling in water heaters, washing machines, and other equipment) to protect subsequent precision purification components.
• Core Purification Equipment:
  • For "domestic water purification" (e.g., washing, cleaning, air conditioning water replenishment), ultrafiltration (UF) equipment is mostly used. It retains colloids, bacteria, viruses, and other microorganisms through UF membranes, and the treated water can meet domestic needs without boiling.
  • For "direct drinking water purification" (e.g., drinking, making tea, kitchen cooking), reverse osmosis (RO) equipment is added on the basis of ultrafiltration to further remove heavy metals (e.g., lead, mercury), dissolved salts, and pesticide residues from water. The treated water is safe for direct consumption. Some buildings are equipped with "end-point direct drinking water machines" (with UV sterilization function) on each floor or in each building to ensure that the water quality still meets direct drinking standards when users collect water.
• Disinfection Equipment: In addition to sterilization during the purification process, some buildings are equipped with UV sterilizers or ozone disinfection devices at the end of water storage tanks and water supply pipe networks to prevent microbial growth (e.g., Legionella) during water storage and avoid "secondary contamination" (where municipal water is qualified but becomes contaminated after storage and transportation through the building's pipe network).