The membrane in the geyser is worn out: how to change

The efficient operation of the water heater depends on the serviceability of all components and mechanisms. The membrane in the geyser is one of the important parts, but wears out over time. How to make a replacement with your own hands? For this we have a detailed work plan.

Membrane functions, causes of failure

The elastic membrane is located at the base of the water unit, reacts to pressure drops in the system. As soon as you open the faucet, the rubber element bends under pressure and pushes the stem out. The stem in turn actuates the gas valve. This is how fuel enters the burner.

With intensive use of the column “Vector”, “Neva”, “Oasis”, the membrane wears out. The rubber is stretched, clogged and damaged. As a result, the fuel does not enter the burner: the column does not ignite or ignites, but immediately goes out.

Signs of breakage

How do you know when it’s time to change the rubber diaphragm? You need to pay attention to:

  • The pressure force of gas and water in the system. Open the tap, count how many liters are consumed per minute. Normally, there should be at least two or three liters. The gas supply can be calculated visually by looking at the strength of the fire.
  • Flame location. In appliances with wick ignition, the fire should burn from the edge of the burner, be at least 3-5 centimeters high. Does not match? Then check the jets for blockage. After cleaning, look at the flame again. If the situation has not changed, the problem is in the diaphragm.
  • The piezo ignition technique should click when the button is pressed. This means that the diaphragm has worked. If no sounds are heard, the part may be damaged or torn.
  • In some models, a rod that controls the operation of the control unit will help determine the breakdown. Remove the protective cover and open the water. If the stem is not moving, the diaphragm needs to be replaced.

After you have found a breakdown, you need to choose the right part for replacement.

How to choose a new part

For each column (“Termet”, “Ariston”, “Beretta”) the membrane is selected individually. For foreign models, finding a replacement is the most difficult, since you can only purchase goods from an official supplier. In this case, you have a choice: invest in a new element or buy a new column.

With domestic technology, everything is easier. Replacement can be found in stores or ordered online.

Experts recommend choosing a silicone diaphragm. It is more flexible and durable.

If you think that the principle of the device of all membranes is the same, it is not so. For example, in Ariston water heaters, special elements are installed – “eights”. They are made of dense rubber, have a special shape. Their cost is from 300 to 500 rubles.

According to the principle of the “eight” the membrane works in the Electrolux devices. But its price is much lower – from 200 rubles.

The easiest to operate and replace the membrane “Neva” and “Astra”.

There are universal options, but they are only suitable for temporary installation. It is impossible to accurately tune the equipment without factory parts.

Independent repair

For repairs, you will need to disassemble the entire water and gas unit. You will need:

  • slotted and Phillips screwdriver;
  • wrenches for 19 and 24;
  • repair kit;
  • new item.

First of all, shut off the water and gas supply. After that, open the faucet in the bathroom, drain the remaining water.

  • Remove the controls from the case by pulling them towards you.
  • If there is a display, disconnect the wiring leading to it.
  • Now you need to remove the cover. In some models, it is bolted on top and bottom, in others it “sits” on latches. Pull the cover towards you and up.

A water node will open in front of you. In earlier models, it is located separately, vertically. A gas block is installed on top, a water supply is organized on the left, and a heat exchanger is on the right.

To unmount such an element:

  • Loosen the two nuts on the water pipes. Use key on 24.
  • Remove the two fixing screws, pull down and remove.

In the latest models, the water unit is placed horizontally. Below there is a special tap through which the remaining water is drained.

  • Unscrew the fixing nuts with a 19 wrench.
  • Disable supply sensors.
  • Remove the bolts that secure the block to the base.
  • Remove the burner.
  • Unscrew the fasteners of the water-gas unit with the manifold.

You can start disassembly. In the old variations of Astra and Neva, eight bolts must be unscrewed to separate the assembly. In modern models “Neva” 4513, 4511, 4510, “Oasis”, “Vector” only four screws hold it.

If the fasteners are rusty and sticky, spray them with VD-40.

It remains to get the worn out membrane and install a new one.

Reassemble in reverse order. Check at the end of the work. Gradually opening the water supply, inspect all connections for leaks. Then open the faucet to full. Everything is fine? Put on the cover, supply fuel – use hot water to your heart’s content.

On the video, they change the aperture for some models:

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