The non-return valve cannot be called an essential item, but in some cases it is truly necessary. An example is the construction of a vacuum chamber when it is necessary to use a non-return valve for pumping air. It can of course be purchased in specialized stores, but can also be built in home conditions that we propose to do right now.
First of all, let's watch a video on making a homemade valve:
To make a check valve, we need:
- the union with a carving on 15;
- plumbing hose for toilets with two fittings;
- 3 mm bolt 4-5 cm long;
- two nuts;
- a piece of rubber from a car camera.
We will start manufacturing the check valve from its main part. To do this, we need our bolt and a piece of rubber. We cut a round gasket from the rubber and make a hole in the middle to pass a bolt through it.
Next, we take a rectangular piece of iron of a small size, we drill a hole in it with a diameter slightly larger than the bolt.
We put on the bolt in turn a piece of iron, a nut, a washer, a piece of rubber and a guide.
Next, we take a threaded fitting and make it cut on it in the size of an iron rectangle so that it fits snugly into place.
The workpieces are ready, which means that you can start assembling the check valve.
With the assembly of the main part of the valve, everything is clear, since we have done this part above. After that, insert this part into the threaded fitting so that the elastic slightly exits from the bottom of the fitting. If necessary, you can adjust the length by screwing or unscrewing the nut on the bolt.
On the lower part of the fitting we twist the second nut with the second fitting. Here the author gives preference to the fitting, which is used on gas pipes in houses.
From above the author winds up a small faucet, but this is not necessary. The faucet can be freely replaced with a regular nut, but care should be taken to ensure that the diameter of the top hole of the nut is less than the diameter of the fitting to fix the iron rectangle.
Such a valve can be used in the manufacture of a vacuum chamber with our own hands, which we will talk about shortly.