Good afternoon, dear guests and subscribers of the "Build for Myself" channel!
The thing is that after installing a shower tray and installing a standard drain with a conventional water seal, very often the owners of such complain about the problem of drying out the water and the appearance of an unpleasant odor from the system sewerage.
When installing pallets, in order to avoid a high step from the floor level of the bathroom, everyone wants to make the pallet as low as possible, accordingly, a low ladder (tray) is used, and the lower it is, the less water is in the U-type siphon and the faster drying out.
Combined shutter - a design that provides protection against drying out of water, thus, when evaporation of water in the tray turns on the dry seal and the smell of sewage from the drainage system does not pass into room.
In this article, I will explain how a dry seal works using the example of a Czech shower channel with a combined seal.
For my shower enclosure, I purchased a rectangular tray due to its more or less beautiful appearance.
Like most people, I chose a ladder of low dimensions. This device has a height of 75 mm from the mounting lugs to the perforated lattice.
After removing the grating, we see that there is a flask inside the device, which combines both locks (water seal and dry lock).
In this model, the function of a dry seal is performed by two balls, which, when the water dries up, tightly block the through passage from the tray to the sewer.
Schematically, it looks like this:
When water enters the tray, under its pressure, a ball made of light plastic (like a float) rises and releases water into the drain system. After stopping the water supply, the ball hermetically closes the hole, thus, despite the presence of a water seal, a reliable dry barrier is also provided.
Therefore, such a device does not need to constantly maintain the water level in the system. Such a ladder works even if there is not a drop of water in it.
From the author:
In fact, such trays (ladders) are at least twice as expensive as standard ones. But, once faced with the smell of sewers in an old house, I had to fill the drain every half day. Now, I still decided to overpay for such a device.
In addition, if the bathroom has a heated floor, the heating section of which is in close proximity to the drain hole, the drain will definitely dry out twice a day, no less. My advice is not to skimp on this!
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