Description

Bosch Aqua 4000 S Water Softener Model 22 – Compact Monobloc System, Intelligent Volumetric Control, 21 Liters Resin Capacity, and Premium Limescale Protection

The Bosch Aqua 4000 S AQ4000S-22 is the ultimate professional-grade solution engineered by Bosch Home Comfort to eliminate the destructive effects of hard water in your home. Water packed with calcium and magnesium salts (hard water) causes severe limescale accumulation inside central heating boilers, water heaters, washing machines, and premium bathroom fixtures—drastically reducing their operational lifespan and driving up your energy bills. Through an advanced ion-exchange process, the Bosch Aqua 4000 S retains these hardness minerals, delivering soft, gentle water throughout your entire property to protect both your pipes and your family's skin.

This premium equipment features a sleek, space-saving monobloc (cabinet) design that neatly integrates the high-capacity cationic resin bed and the brine storage tank into a single unit. Equipped with an intelligent proportional volumetric regeneration system, the unit continuously monitors your household's real-time water consumption. It initiates the resin cleaning cycle only when its exchange capacity is nearly exhausted, heavily optimizing water and salt consumption compared to traditional time-based softeners. Bring the legendary engineering, reliability, and precision of Bosch directly into your home's water filtration system.

✨ 3. Technical Advantages and Top Features

• Total Installation & Appliance Protection: Stops scale formation dead in its tracks inside boiler heat exchangers and water heater heating elements, maintaining peak thermal efficiency and preventing expensive breakdowns.

• Proportional Volumetric Regeneration: The built-in micro-processor tracks your actual water usage and calculates the exact amount of brine needed, saving considerable amounts of salt and rinse water compared to standard systems.

• Ergonomic Cabinet Design: Saves valuable footprint area in your utility room or garage. The smart top-cover design allows for effortless salt pellet refills whenever needed.

• Intuitive Digital Interface: A modern LCD display makes it simple to input your raw water hardness level during commissioning and provides real-time data regarding the remaining soft water capacity before the next regeneration.

• Substantial Household Savings: Washing with softened water makes clothes feel noticeably softer, reduces detergent and soap consumption by up to 50%, and completely eliminates ugly white scale stains on shower glass and tiles.

• Certified High-Quality Components: The control valve and ion-exchange resin comply with strict European drinking water standards, ensuring safe, reliable, and food-grade operation for years to face.

📊 4. Technical Specifications Table: Bosch Aqua 4000 S (Model 22)

All technical data metrics listed below are extracted directly from the official manufacturer documentation in image_db36e4.png:

Technical Feature	Unit	Technical Value (Model 22)
Resin Volume (VR)	L	21
Nominal Flow Rate	m3/h	1.8
System Capacity	of x m3 m3 x odH	102 57
Salt Consumption per Regeneration	kg	2.2
Maximum Salt Storage Capacity	kg	120
Water Consumption per Regeneration	L	104
Nominal Power Input	W	15
Nominal Voltage	V	12
Pressure Drop	[KPa]	94
Operating Pressure Range	bar	2 - 6
Ambient Operating Temperature	oC	5 – 40
Water Operating Temperature (TW)	oC	5 - 30
Ambient Temperature (Drinking Water)¹⁾	oC	5 - 25
Nominal Pressure Class	-	PN 10
Applicable Water Quality	-	Potable / Drinking Water
Inlet and Outlet Connection Interface	-	1" External Thread
Width	cm	56.0
Depth	cm	33.3 or 33.5 (depending on trim)
Height	cm	84.5

🛠️ Specialist's Technical Advice for Best Performance:

💡 Expert Recommendation: Before configuring and running your Bosch Aqua 4000 S system, it is highly recommended to perform a raw water hardness test using a standard liquid droplet test kit. Input the exact value in German degrees (^odH) into the electronic control valve menu to ensure perfectly balanced softening and avoid unnecessary regeneration cycles.

⚠️ Important Installation Note: To safeguard the sensitive internal disk mechanism of the control valve from mechanical debris like sand, rust, or pipe shavings, always install a mechanical sediment pre-filter (minimum 20–50 microns) ahead of the water softener input line. Furthermore, ensure a functional drain connection is available nearby, as the system requires a path to flush out the saltwater brine during its automated regeneration phase.