Replacing filters in the Geyser Prestige reverse osmosis system: a complete guide for

Reverse osmosis system Geyser Prestige - one of the most popular solutions for deep water purification at home. She deletes up 99,9% impurities, including heavy metal salts, nitrates, viruses and bacteria, providing crystal clear water straight from the tap. However, the efficiency of operation directly depends on the timely replacement of filter elements. Many users make maintenance errors, which leads to deterioration in water quality or even membrane failure.

In this article we will look at step-by-step instructions for replacing all filters in Geyser Prestige (models Prestige 2, Prestige PM, Prestige M), including pre-filters, carbon post-filters and reverse osmosis membrane. You'll learn how often to change each element, what tools you'll need, and how to avoid common mistakes. We will also give recommendations on choosing original and analog cartridges to save money without losing quality.

If you've never had to maintain a reverse osmosis system, don't worry: the process of replacing filters is easier than it seems. The main thing is to follow a clear algorithm and not miss key points, for example, washing the new membrane or checking the tightness of connections. And for those who already have experience, we have prepared unique life hacks to extend the life of filters by 15–20% without harm to health.

1. When and why should you change filters in the Geyser Prestige system?

The service life of filters depends on the quality of the source water, intensity of use and system model. Manufacturer Geyser recommends adhering to the following intervals:

• 🔹 Pre-filters (1–3 stages): every 3–6 months. They retain mechanical impurities (sand, rust), chlorine and organic matter, protecting the membrane from premature wear.
• 🔹 Reverse osmosis membrane: once every 1.5–2 years. This is the “heart” of the system, which removes up to 98% of contaminants. Its resource depends on the hardness of the water and timely replacement of prefilters.
• 🔹 Post filter (carbon): every 6–12 months. It improves the taste and smell of water by removing residual impurities after the membrane.
• 🔹 Mineralizer (if available): once every 1–1.5 years. Restores beneficial minerals removed by the membrane.

But why can't you just wait for the water to get worse? The point is that clogged filters not only impair cleaning quality, but also create additional load on the membrane, reducing its service life by 2–3 times. For example, if the mechanical cleaning pre-filter is not replaced on time, rust particles will penetrate the membrane and damage its micropores. As a result, you will have to buy a new membrane (cost from 2,500 to 5,000 rubles) instead of a cartridge for 300–500 rubles.

⚠️ Attention! If after replacing the filters the water flows in a thin stream or air bubbles appear in it, this is a sign improper installation of the membrane or depressurization of the system. Immediately turn off the water and check all connections.

How do you know when it’s time to change the filters, even if six months have not passed?

• 💧 The water has become cloudy or has an unpleasant taste.
• 🔊 The system began to make more noise than usual (whistle, gurgle).
• ⏱️ Refilling the tank takes 2 times longer.
• 📉 The pressure in the purified water tap has dropped.

2. What filters are suitable for Geyser Prestige?

Systems Geyser Prestige Comes with standard size filters SL 10" (length 25 cm, diameter 6.3 cm). This means that you can use both original cartridges from Geyser, as well as analogues from other brands (Aquaphor, Barrier, Atoll). However, it is important to consider filler type and its compliance with the purification stage.

stage	Filter type	Original art.	Recommended analogues	Cost, ₽
1st	Mechanical cleaning 5 microns	Geyser 1PF	Aquaphor K1-5, BB05	250–400
2nd	Coal block	Geyser 2PF	Aquaphor K2-10, CTO-10	300–500
3rd	Mechanical cleaning 1 micron	Geyser 3PF	Aquaphor K1-1, BB01	280–450
4th	Reverse osmosis membrane	Geyser RO-2540	Filmtec TW30-1812-50	2 500–4 500
5th	Post filter (carbon)	Geyser 5PF	Aquaphor K7, CB5-10	400–600

When choosing analogues, pay attention to pore size (for mechanical filters) and type of carbon filler (coconut charcoal is considered the best). For example, cheap coal-based charcoal cartridges can impart an aftertaste to water. Also check filter resource — some analogues last 20–30% less than the originals.

⚠️ Attention! Never use filters that have expired (indicated on the packaging). Carbon cartridges lose their adsorption properties over time and can become a source of bacteria.

Where to buy filters?

• 🛒 Official stores Geyser (guaranteed originality, but prices are higher).
• 🌍 Online stores (Ozone, Wildberries, Yandex Market) - often there are discounts up to 30%.
• 🏬 Local water purification stores (you can touch the product before purchasing).

3. Preparing for replacement: tools and safety precautions

Before starting work, be sure to:

1. Turn off the water supply to the system (usually the tap is located under the sink).
2. Open the clean water tap to relieve pressure in the system.
3. Disconnect the storage tank (if present) from the power supply.
4. Prepare a container to drain the remaining water from the flasks.

You will need:

• 🔧 Key for flasks (included with the system or purchased separately).
• 🧻 Absorbent napkins or rags.
• 💦 Soap solution (to check the tightness).
• 📦 New filters (check the package before installation!).
• 🔨 Screwdriver (for some models with clip-on flasks).

If you are changing filters for the first time, take a photo of the location of the flasks and the direction of the arrows on them. This will help avoid confusion when reassembling. Also note color marks on the flasks - they correspond to the stages of purification (usually the 1st stage is blue, the 2nd is yellow, the 3rd is red).

Important: Do not use lubricant or sealant for rubber seals of flasks! This can result in chemicals leaching into drinking water. If the sealing ring has lost its elasticity, replace it (costs about 50 rubles).

4. Step-by-step instructions for replacing filters

Let's consider the process using the example of a system Geyser Prestige 2 (similar for models PM and M).

Step 1: Removing old filters

1. Take a flask wrench and carefully unscrew the first flask (clockwise when viewed from above).

2. Remove the old cartridge and wash the flask with warm water and soap. Do not use aggressive detergents!

3. Check the condition of the O-ring on the neck of the flask. Replace if necessary.

4. Repeat the procedure for the remaining flasks (2nd and 3rd stages).

Step 2: Installing New Filters

1. Remove the new cartridges from the packaging and remove the protective films.

2. Insert the 1st stage filter into the flask down arrow (the direction of water flow is indicated on the cartridge body).

3. Fill the flask 2/3 full with water to avoid the formation of air pockets.

4. Screw the flask back into the system all the way with your hands, then tighten with a wrench (do not overdo it!).

5. Repeat for 2nd and 3rd steps.

Step 3: Replace the reverse osmosis membrane

The membrane is contained in a separate housing (usually white or transparent). To replace it:

1. Unscrew the plastic clips or nuts (depending on the model).
2. Remove the old membrane and wash the housing.
3. Install a new membrane corrugated side to the inlet.
4. Secure the housing and check for leaks.

What happens if the membrane is installed incorrectly?

If the membrane is installed backwards, it will not only not purify the water, but will also quickly fail. It is also possible for untreated water to enter the tap, since reverse osmosis simply will not work.

Step 4: Replacing the post-filter and mineralizer

The post-filter (5th stage) is changed in the same way as the pre-filters. If your system has a mineralizer (6th stage), it is enough to rinse it under running water or replace the cartridge once every 1.5 years.

Step 5: Flushing the System

After replacing all filters:

1. Open the water supply.
2. Drain the first 10-15 liters of water (it may be cloudy - this is normal).
3. Check the system for leaks (coat the connections with soapy water - if bubbles appear, tighten the flasks).

5. Common mistakes and how to avoid them

Even experienced users sometimes make mistakes that lead to breakdowns or deterioration in water quality. Here are the most common:

• 🔧 Pulling flasks with a wrench → cracks in the plastic or cut threads. Solution: twist the flasks by hand until they stop, then tighten them 1/4 turn with a wrench.
• 💦 Ignoring flushing after replacement → coal dust or preservative solution will get into the water. Solution: Drain the first 10–15 liters.
• 🔄 Confusion in filter order → Stages 1 and 3 are swapped. Solution: Pay attention to the color coding of the flasks.
• 🕳️ Untimely replacement of prefilters → the membrane clogs in 6 months instead of 2 years. Solution: Keep a log of substitutions.
• 🧲 Using magnetic “cleaners” → they do not replace filters and may damage the membrane. Solution: Don't fall for marketing gimmicks.

One of the most dangerous mistakes is use of uncertified membranes. Cheap Chinese analogues (for example, without marking NSF or ISO) can allow up to 30% of contaminants to pass through and release harmful substances. Check the package for certificates!

6. How to extend the service life of filters?

You can save on consumables not only by purchasing analogues, but also by properly operating the system:

• 🚰 Install the main filter before the reverse osmosis system. It will retain large impurities and extend the life of prefilters by 30%.
• 🌡️ Monitor the water temperature. The optimal range is 5–30°C. Hot water destroys the membrane.
• 🔌 Unplug the tank, if you do not use the system for more than a week (for example, you are going on vacation).
• 🧼 Rinse the flasks every time you replace filters - this will prevent the formation of bacterial plaque.
• 📅 Keep a log of replacements. Make a note of filter dates and models so you don't miss service dates.

Another life hack: if the water in your region is very hard (more than 10 mEq/l), install polyphosphate filter before the reverse osmosis system. It will bind hardness salts and protect the membrane from limescale. The cost of such a filter is about 1,000 rubles, but it pays for itself by increasing the service life of the membrane.

Also note crane operating modes. If you often open the tap at full power, the membrane will wear out faster. The optimal flow rate is 0.5–1 liter per minute.

7. How to check the water quality after replacement?

Even if you did everything correctly, it is worth making sure that the system works effectively. Here are some ways to check:

• 🔬 TDS meter (device for measuring hardness). High-quality water after reverse osmosis should show 5–20 ppm. If the value is above 50 ppm, the membrane is faulty.
• 👅 Taste and smell. The water should not smell like coal, metal or chlorine. A slight sweetish taste is the norm for mineralized water.
• 📊 Laboratory analysis. Once a year, have your water tested at the SES or a private laboratory (cost: 1,500–3,000 rubles).
• 👀 Visual inspection. There should be no turbidity, sediment or bubbles in a glass of clean water.

If the TDS meter shows high values and the water has a taste, the following problems may occur:

• The membrane is not installed correctly or is damaged.
• The prefilters cannot cope with the load (the main filter needs to be replaced or added).
• There is a leak in the system, and untreated water is mixed with clean water.

8. Frequently asked questions

Can flasks be washed in the dishwasher?

No, this will lead to deformation of the plastic and loss of tightness. Wash flasks only by hand with warm water and a mild detergent.

What should I do if water does not flow after replacing the filters?

Probable reasons:

1. The water supply valve to the system is not open.
2. Tubes or valves are clogged (need to be blown out with compressed air).
3. Diaphragm installed incorrectly (check direction).
4. The storage tank has failed (check the air pressure in it - it should be 0.5–0.7 atm).

How much does it cost to completely replace all filters?

The cost depends on the choice of original or analog cartridges:

• Original set (1–5 stages + membrane): 6,000–9,000 ₽.
• Analogs (quality brands): RUB 3,500–5,000.
• Budget analogues: 2,000–3,000 ₽ (but the risk of poor cleaning quality).

Advice: buy filters in bulk (1-2 years in advance) - many stores give a discount of up to 20%.

Is it possible to wash the membrane yourself instead of changing it?

Technically yes, but this is a temporary measure. For washing:

1. Remove the membrane and soak it in a solution of citric acid (1 tablespoon per 1 liter of water) for 1–2 hours.
2. Rinse under running water.
3. Reinstall.

However, such washing restores only 30–50% of efficiency. After 1–2 months, the membrane will still have to be replaced.

Does the system need to be sterilized after replacing the filters?

If you use original cartridges and maintain hygiene when replacing, sterilization is not required. However, if the water has a strange smell or old filters have been in the system for a long time, you can disinfect it:

1. Prepare a solution (1 tablet Aquasepta or 1 tsp. chlorhexidine per 5 liters of water).
2. Pour the solution into the system through a clean water tap.
3. Wait 30 minutes, then flush 2-3 tanks of water.