Reverse osmosis system with filter Geyser Prestige - one of the most effective solutions for deep water purification in your home or office. However, even with high-quality equipment, incorrect connection of tubes can negate all the benefits: from reducing the life of the membrane to leaks and breakdowns. In this article we will look at exact connection diagram, the nuances of connecting with reverse osmosis, as well as typical mistakes that are made during installation.

Feature Geyser Prestige - its modular design allows the filter to be integrated into existing water treatment systems. But here lies the main difficulty: if you mix up the order of connecting the tubes or choose the wrong fittings, the pressure in the system may drop and the quality of the water may deteriorate. We will show you in detail which tube should I connect where?, how to avoid air locks and why it is important to consider the direction of flow in each module.

The article will be useful for both beginners and those who have already encountered installing filters, but want to check the correctness of their scheme. At the end you will find a FAQ with answers to frequently asked questions and a checklist for self-testing before starting the system.

1. Equipment and purpose of tubes in the Geyser Prestige system

Before we start connecting, let’s figure out which tubes are included in the kit Geyser Prestige and what each is responsible for. Standard system includes:

  • 🔹 Water supply tube (usually blue or red) - brings untreated water from the tap to the first filter.
  • 🔹 Drainage tube (black or gray) - removes the concentrate (dirty water) after the membrane into the sewer.
  • 🔹 Clean water tube (white or transparent) - transports purified water to the tap or storage tank.
  • 🔹 Post filter tube (can be marked green) - connects the membrane to the carbon post-filter.
  • 🔹 Mineralizer tube (if included) - connects after the post-filter to enrich the water with minerals.

Important: in some modifications Geyser Prestige (for example, Prestige PM or Prestige M) the number of tubes may vary. Always check the instructions for your model! Tubing colors may also vary from batch to batch, so consider the color as well as the marking or diameter.

The diameter of the tubes is usually 1/4 inch (6 mm), but can be used for drainage 3/8 inch (10 mm). If your kit contains unmarked tubes, measure them with a caliper or ruler - this will help avoid confusion when connecting.

📊 What kind of reverse osmosis system are you installing?
Geyser Prestige
Aquaphor
Barrier
Atoll
Another

2. Tube connection diagram: step-by-step instructions

Now let's move on to the connection diagram itself. Below is a universal sequence for most models Geyser Prestige with reverse osmosis. If your system has additional modules (for example, a UV lamp or pump), their connection is described separately.

  1. Connection to water supply. The water supply tube (blue/red) is connected to input adapter on the first pre-cleaning flask. At the other end of the tube is installed mortise tee into a cold water supply (usually under the sink).
  2. Connecting pre-filters. The output of the first filter (mechanical cleaning) is connected by a tube to the second filter (carbon), then to the third (if any). Order of flasks: 5 µm → coal → 1 µm.
  3. Membrane connection. After the pre-filters, the water enters the membrane housing. It is important here not to confuse the input and output: the membrane input is always marked with an arrow or the inscription “IN”, output - “OUT”.
  4. Drainage tube. Connected to the concentrate membrane outlet (usually marked “Waste” or “Drain”) is a black tube that leads to drain clamp in the sewer.
  5. Post filter and faucet. Clean water from the membrane (output “OUT”) goes to the post-filter (charcoal or mineralizer), and then to drinking water tap or storage tank.

Visually the scheme looks like this:

Plumbing → Pre-filters (1→2→3) → Membrane (IN/OUT) → Post-filter → Tap


↓


Drainage → Sewerage

If your system has pressure pump, it is installed between the post-filter and the tap. For models with mineralizer (for example, Geyser Prestige M) add another module after the post-filter.

The tubes are cut to length with a margin of 10 cm|

All fittings are crimped and tested for leaks|

The direction of the arrows on the membrane coincides with the water flow|

The drainage tube is secured with a clamp in the sewer |

The drinking water tap is installed and checked for leaks -->

3. Typical connection mistakes and how to avoid them

Even experienced installers sometimes make mistakes that later lead to breakdowns. Here are the most common of them:

  • 🚫 Membrane input/output reversed. If you connect the tubes the other way around, the membrane will quickly clog and the pressure of clean water will drop to zero. Always check the "IN"/"OUT" markings!
  • 🚫 Drain tube without air gap. If the tube is immersed in water in a sewer, siphon effect, and the membrane begins to pass dirty water into a clean stream.
  • 🚫 Using incompatible fittings. For example, tubes 1/4" with fittings 3/8" will lead to leaks. Always check the diameters!
  • 🚫 No check valve. Without it, water from the tank may return to the membrane, reducing its service life.

Another common problem is air jams in the system. They occur if the membrane is not washed before the first start-up or the tubes are not filled correctly. To avoid this, after installation:

  1. Open the clean water tap.
  2. Turn on the water supply and let the system run for 5-10 minutes until there is a uniform flow without jerking.
  3. Close the tap and check all connections for leaks.

If after starting the water flows in jerks or with air, it means there is a leak somewhere. Most often this happens in the crimp areas of the fittings - they need to be tightened or replaced.

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Before starting the system for the first time, drain the first 10–15 liters of water - this will remove any remaining coal dust and preservative solution from the membrane.

4. Connection to a storage tank: nuances

If your system has storage tank, its connection requires special attention. The tank is connected to the system via tee, which branches the flow of clean water to the tap and tank. Here are the key points:

  • 🔧 The tube from the post-filter goes first to check valve, then to the tee.
  • 🔧 From the tee, one tube leads to tap, the other - to baku.
  • 🔧 There should be a second check valve (sometimes it is built into the tank).
  • 🔧 The air pressure in the tank is checked with a pressure gauge - it should be 0.3–0.5 atm.

If the tank is not connected correctly, you will face two problems:

  1. Water does not flow into the tank, although the tap is working (which means there is no check valve on the tank).
  2. Water from the tank returns to the membrane (which means the valve at the membrane outlet is faulty).

To check the tank for leaks, disconnect the system from the water supply and press on the tank nipple. If water comes out of it, the tank membrane is torn and needs to be replaced.

Problem Reason Solution
Tank won't fill Check valve clogged or low pressure in the water supply Clean the valve or install the pump
Tap water comes out in spurts There is air in the tank or the membrane is torn Bleed air through nipple or replace tank
The connection to the tank is leaking The fitting is poorly crimped or the gasket is worn out Tighten the fitting or replace the gasket

5. Connecting to the sewer: rules and life hacks

The drainage tube is one of the most problematic elements of the system. If you connect it incorrectly, you risk flooding the adjacent sink or encountering a sewer smell. Here's how to do everything according to the rules:

  • 🚿 The tube must go into the sewer with air gap (at least 2 cm from the water level in the siphon).
  • 🚿 Use drain clamp with a rubber gasket to prevent the tube from popping out during a pressure surge.
  • 🚿 If there is any in the sink overflow, it is better to remove the drainage tube separately, and not into a common siphon.
  • 🚿 For long tubes (more than 3 m) use drain pump, otherwise the water will stagnate.

If your sink does not have a separate hole for drainage, you can use siphon adapter with additional fitting. The main thing is to make sure that the diameter of the fitting matches the diameter of the drain tube (usually 1/4" or 3/8").

⚠️ Attention! Never connect a drain pipe directly to a sewer riser without a siphon. This breaks the water seal and allows odors to enter the room.

If after connecting you notice that the water coming out of the tap is slow and the drainage flow is too strong, check:

  • Is the drain hose kinked?
  • Is the drain clamp clogged?
  • Does the pressure in the water supply meet the requirements of the membrane (usually 2.8–4 atm).

6. System check after connection

After installation, be sure to conduct a test run. Here is a checklist to check:

Open the clean water tap and drain the first 10 liters|

Check all connections for leaks (especially fittings and clamps)|

Measure the pressure in the tank (should be 0.3–0.5 atm)|

Check the filling rate of the tank (norm: 1–2 l/hour)|

Check the taste and clarity of the water (there should be no taste of plastic or chlorine) -->

If the water is cloudy or has an unpleasant aftertaste, it means:

  • 🔍 Pre-filters are not washed — drain the water until it becomes clear.
  • 🔍 The membrane is not installed correctly — check the direction of flow.
  • 🔍 Postfilter has exhausted its resource (if the system is not new) - replace the cartridge.

For accurate diagnosis you can use TDS meter - a device for measuring water hardness. Normally, the indicator after reverse osmosis should be 10–30 ppm. If the value is higher 50 ppm, the membrane does not work effectively.

What to do if TDS is high?

High TDS after the membrane can mean:

1. The membrane is worn out (lifetime - 1–3 years, depending on the model).

2. Drainage flow is too weak (check water supply pressure).

3. There is no check valve in the system, and dirty water returns to the membrane.

If replacing the membrane does not help, check the inlet pressure - a pump may be required.

7. System maintenance: when and what to change

To Geyser Prestige worked efficiently, the system needs to be serviced regularly. Here is the recommended schedule for replacing consumables:

element Replacement period Signs of wear
Pre-filters (1–3 flasks) Every 3–6 months Reduced pressure, cloudy water
Reverse osmosis membrane Every 1–3 years High TDS, slow tank filling
Post filter (carbon) Every 6–12 months Foreign taste or odor
Mineralizer (if available) Every 12 months Decreased flavor intensity

When replacing the membrane, be sure to:

  1. Turn off the water and relieve pressure in the system.
  2. Remove the old membrane and rinse the housing from plaque.
  3. Install the new membrane, lubricating the O-rings with silicone grease.
  4. Flush the system for 10-15 minutes before use.

If you are using Geyser Prestige with a pump, check its operation every six months. Signs of pump failure:

  • 🔊 Excessive noise or vibration.
  • 🔊 Reduced performance (tank takes too long to fill).
  • 🔊 Heating the pump housing.
⚠️ Attention! If after replacing the membrane the water flows very slowly, check whether the tubes at the inlet and outlet of the membrane are mixed up. Also make sure that the drainage tube is not kinked.

FAQ: Answers to frequently asked questions

Is it possible to connect Geyser Prestige without a storage tank?

Yes, but this will reduce the service life of the membrane, since it will operate in constant drain mode. Without a tank, water will flow directly to the tap, but the pressure will be weak (about 0.1–0.3 l/min). For comfortable use, a tank is required.

What should I do if, after connecting, water comes with air?

This is a sign of an air lock. Need:

  1. Open the clean water tap and drain 5–10 liters.
  2. Check the tightness of all connections (especially on the membrane and post-filter).
  3. If the problem remains, reconnect the tubes, making sure there are no kinks.
What should be the water pressure at the inlet?

The optimal pressure for membrane operation is 2.8–4 atm. If the pressure is lower 2.5 atm, install the pump. If higher 6 atm - use a reducer to avoid damaging the membrane.

Can I use tubes from another system?

It is possible, but only if they match in diameter (1/4" or 3/8") and material (usually low pressure polyethylene). PVC or metal-plastic pipes are not suitable - they can burst under pressure.

Why did the water become bitter after replacing the membrane?

This is a sign that:

  • The new membrane is not washed (drain the water for 10–15 minutes).
  • The post filter has reached the end of its life (replace it).
  • There is no mineralizer in the system, and the water is too demineralized (install a mineralizer or drink water with added minerals).