Providing clean drinking water is one of the key health goals for every family, and choosing to install a three-stage system under the sink is an excellent choice. Model Aquaphor Crystal has proven itself as a reliable and durable filter capable of purifying water from chlorine, heavy metals and mechanical impurities. The installation process may seem complicated only at first glance, but if you have basic tools and carefully study the diagram, any home craftsman can handle the task without calling a plumber.
Before starting work, it is extremely important to prepare the workspace and make sure that all the components included in the standard kit are available. The kit usually includes three flasks with cartridges, a separate faucet for clean water, a set of tubes, a sleeve for attaching the faucet and a wrench for unscrewing the flasks. Check carefully the integrity of the rubber seals on the lids of the flasks, since they are responsible for the tightness of the entire system and prevent leaks under the sink.
For successful installation, you will need not only the filter itself, but also a certain set of tools that can be found in the arsenal of any owner. Prepare in advance an adjustable wrench, a screwdriver, pipe cutters (or a sharp knife), and a container for draining the water. Don't start installation if the pressure in the water supply exceeds the permissible standards specified in the product data sheet, as this can lead to rupture of connections.
Preparation for installation and selection of installation location
The first step is to determine the optimal location to place the filter system. Most often Aquaphor Crystal mounted on the side wall of the kitchen sink or on the wall underneath it, if space allows. It is important to ensure free access to the flasks for their subsequent replacement, as well as the absence of direct contact with heating devices or open flame sources.
It is necessary to turn off the cold water and relieve pressure in the system by opening the faucet in the kitchen. If you plan to tap into a metal pipe, you may need a special mortise coupling, although in modern apartments plastic pipes are more often used, where tapping is easier. Make sure that the connecting pipes are long enough for a comfortable connection without tension.
- 🛠️ Check if there is free space under the sink to accommodate three vertical flasks.
- 💧 Shut off the cold water supply valve before starting any manipulations with the pipeline.
- 🔍 Inspect the threaded connections for chips or factory defects before assembly.
⚠️ Attention: Do not install the filter in places where the ambient temperature can drop below +5°C or rise above +40°C, this will disrupt the operation of the sorbents.
If it's too crowded under the sink, consider mounting the filter unit to the side of the cabinet. This will make it easier to replace cartridges in the future, since you won’t have to completely remove the system from the depths of the cabinet each time. Correct positioning will also protect plastic elements from accidental impacts when storing household chemicals.
Connection diagram and assembly sequence
The main stage of work is the physical connection of the modules according to the instructions. Series filters Crystal often have markings on the flask bodies or lids indicating the order of connection: water inlet, successive cleaning stages and outlet to the tap. The standard scheme assumes the movement of water from left to right or according to the numbering of stages 1-2-3.
First, assemble the filter unit by connecting the flasks to each other with the provided adapters, if the model requires preliminary assembly of a modular cassette. In some modifications, such as Aquaphor Crystal Eco or N, the Smart quick-change system is used, where the flasks are simply inserted into the grooves until they click. For classic models, you need to screw the flasks onto the lid, making sure that the threads match and the position of the seals.
☑️ Check before assembly
Connect the inlet pipe (usually marked as IN or Login) to the water supply through a tee. Outlet pipe (OUT or Exit) is connected to a separate tap for drinking water. Use blue tubing for cold water, ensuring they are cut cleanly at a 90-degree angle to ensure a tight seal in the quick-connect fittings.
| System element | Function | Connection feature |
|---|---|---|
| Cartridge K1 (Module 1) | Mechanical cleaning | The first stage takes the brunt of the pressure |
| Cartridge K2 (Module 2) | Sorption purification | Removes chlorine and organic matter, requires vertical position |
| Cartridge K3 (Module 3) | Post-processing / Mineralization | Final cleaning, often contains silver or minerals |
| Separate tap | Purified water supply | Requires drilling a hole in the sink or countertop |
Drinking tap installation
Installation of a separate tap is a prerequisite for operating a reverse osmosis system or flow filters. You will need to drill a hole in the sink or countertop with the diameter specified in the instructions (usually 12-14 mm). If the sink already has a reserved hole for the detergent dispenser, you can use it by first removing the plug.
Pass the filter tube through the decorative trim and insert it into the base of the faucet. Secure the faucet to the surface using a rubber pad on the bottom to protect against scratches and a metal washer with a nut to secure it. Tighten the nut tightly, but without excessive force, so as not to strip the threads or crack the ceramics of the faucet.
Connect the tube coming from the outlet of the last filter flask to the lower fitting of the faucet. To secure the connection, use a locking collet and a locking ring, if provided by the design. Make sure the tubing is not kinked or kinked that could impede the flow of water.
If the sink is made of thin stainless steel, use an additional metal plate on the bottom to reinforce the faucet mounting point to avoid surface deformation.
Initial flushing and startup of the system
After assembling all connections, it is necessary to carry out an initial flushing of the system. This is a critical step because new cartridges contain carbon dust and a preservative (food stabilizer) inside, which must be removed before consuming the water. Open the water supply valve to the filter and make sure there are no leaks at all connections.
Open the tap with purified water and wait 5-10 minutes. The pressure may be weak in the first minutes, until the air leaves the system and the cartridges are saturated with water. Drain at least 10-15 liters of water until it becomes completely clear and without any foreign taste. At this time, you can check the connections for micro-leaks by running a dry cloth over the joints of the tubes.
- 💧 Open the tap completely and let the water flow into the sink for 10 minutes.
- 👀 Visually control the appearance of air bubbles coming out of the water.
- 👃 Check the water for odor: the presence of chlorine smell after rinsing is unacceptable.
⚠️ Attention: The water drained during the first flush is technical and not suitable for drinking or cooking; use it only for household needs.
If you notice leakage in the threaded connections of the flasks, try to slightly tighten them with a wrench, but do not overdo it. If water drips from the collet on the tube, make sure the tube is cut straight and inserted all the way. Tightness - the key to long service life of your kitchen furniture and peace of mind for your neighbors downstairs.
Cartridge replacement and maintenance
The service life of filter modules depends on the quality of the source water and the volume of consumption, but on average it ranges from 4000 to 8000 liters or 6-12 months of operation. A signal for replacement is a decrease in water pressure or the appearance of an unpleasant aftertaste. For classic models Aquaphor Crystal replacement is made by unscrewing the flask counterclockwise with a special key.
Before replacing, be sure to turn off the water and release the pressure by opening the drinking tap. Remove the old cartridge, rinse the flask with warm water (no detergents!) and insert the new module, observing the markings of the steps. In models with replaceable modules Smart the process is even simpler: the old block is removed upwards, and the new one is inserted until a characteristic click is heard.
How to extend the life of cartridges?
If you are going on a long vacation, turn off the water supply valve to the filter. This will stop the process of biological fouling and oxidation of sorbents, preserving their resource. Be sure to flush the system again before returning.
Check the condition of the tubes and connections regularly, especially after replacing cartridges. Rubber seals may lose elasticity over time, so it is recommended to lubricate them with food-grade silicone every third replacement. Timely service guarantees stable cleaning quality and no surprises in the form of leaks.
Typical installation errors
One of the most common mistakes is that the cartridges are oriented incorrectly or the inlet and outlet are mixed up. Water must flow strictly in the direction of the arrows indicated on the filter housing. If you connect the system in reverse, the filter material can be washed into the pipeline, and the cleaning efficiency will drop to zero.
Often, users forget to remove the shipping plugs from the connection ports or do not fully insert the tubes into the fittings. This leads to the fact that water either does not enter the system, or the connection depressurizes under pressure. It is also a mistake to ignore flushing, which leads to rapid contamination of the membrane (in systems with osmosis) or simply tasteless water.
- ❌ Installing the filter in an inverted position (flasks up), which is unacceptable for some models.
- ❌ Using tubes of smaller diameter than recommended by the manufacturer.
- ❌ Lack of shut-off valves in front of the filter, which makes replacing cartridges impossible without turning off the water in the entire apartment.
Avoid installing the filter near a hot heating pipe. Although Aquaphor Crystal designed to work with cold water, excess heat from adjacent communications can change the structure of the plastic or accelerate the growth of bacteria inside the flasks. Compliance with temperature conditions is a simple rule that will significantly extend the life of the device.
The main secret to a successful installation is to take your time when tightening connections and be sure to completely flush the system before first use.
Frequently asked questions (FAQ)
How often do you need to change cartridges in Aquaphor Crystal?
The standard cartridge life is 6 months or 6000-8000 liters of water, depending on the model. However, if you notice a change in the taste of the water or a decrease in pressure, you should replace it sooner. For families with high water consumption, it is recommended to change the modules every 4-5 months.
Is it possible to install a filter if the pressure in the water supply is above 6 atmospheres?
Maximum operating pressure for most models Aquaphor is 6 atmospheres (0.6 MPa). If the pressure in your system is higher, you must install a pressure reducer in front of the filter, otherwise the housing may not withstand the load and burst.
What should I do if after installation the water flows with black particles?
The black particles are activated carbon that washes out of the new cartridge. This is normal for the first 10-20 liters. It is necessary to continue washing until the water becomes completely clear. If the blackness does not go away after 30 liters, check the integrity of the cartridge.
Are Aquaphor cartridges compatible with other brands?
Standard 10SL (Slim Line) flasks are universal in size and can accommodate cartridges from other manufacturers of a similar standard. However, system modules Smart have a unique design and are compatible only with original Aquaphor replacement units.
Is it necessary to boil water after the Aquaphor Crystal filter?
Crystal series filters (without reverse osmosis) purify water from chlorine, rust and heavy metals, making it suitable for drinking raw. However, if tap water initially has bacteriological contamination (which is rare in a centralized water supply), it is still recommended that children under 3 years of age boil the water for drinking.