How to determine the diameter, depending on the purpose of use

The main headache of those who want to lay a sewer in their home is preliminary calculations. There is so much to consider, and if you miss something, you will have to redo everything, spending money and invaluable time on it. Well, let's try to delve into this difficult matter.

Parameters of various types of sewer pipes

The first factor to consider is the amount of waste, which depends on the amount of plumbing in the house. If you only have a bathroom, a toilet and a sink in the kitchen, you can choose a smaller diameter, and if, in addition to all this, a washing machine, a dishwasher are added, and, God forbid, a bidet with a urinal, then, of course, then it is better to purchase more.

Reference! While researching the issue of diameter on the Internet, you may stumble upon frightening articles that will assure you that that it is necessary to take into account the points of installation of plumbing, turns, points of connection, the speed of movement of drains, etc. etc. etc. Until your brain explodes, I will immediately reassure you: all this must be done by professional builders, who lay in-house communications and their task is to provide a whole apartment house. I still suspect that your front of work is limited only to an apartment or a private house, and for these purposes such subtleties are not needed.

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What you need to consider is the pipe material. But fortunately, this is not difficult at all, since there are well-established standards that I will simply copy here.

If plastic is used, then pipes with a diameter of 32, 50 or 110 mm will be required to lay the sewage system inside the house. The same parameters apply to PVC products. In general, these are the most demanded materials, since they are reliable and easy to use.

Cast iron is much less popular for in-house communications, however, its fans still exist. They can choose pipes with a diameter of 5 to 30 cm.

How to determine the diameter depending on the purpose of use

First of all, pay attention to this table.

As you can see, it is very convenient for it to select pipes for each type of plumbing equipment. Now let's look at this in a little more detail.

For the central riser of an ordinary apartment with a standard amount of plumbing 10 cm - that's it.

For the kitchen, pipes with a diameter of 4 to 5 cm are suitable, and now I will explain why. Firstly, it is for these parameters that the shaped parts of the sink are designed, which means that additional adapters may not even be required. Secondly, this diameter is the most optimal for the volume of drains that are usually found in standard kitchens.

Now the toilet. For obvious reasons, the pipe connected to the toilet should be the widest - at least 10 cm.

Attention! The shorter the bend, the better. The short distance between the toilet and the main riser significantly reduces the possibility of blockages.

For urinals, for no less obvious reasons, a pipe with only a 5 cm diameter is sufficient. The same goes for the bathroom.

Separately, you need to talk about the washing machine. It all depends solely on its technical characteristics, so be sure to find them on the Internet. If you are just planning to buy it, consult the seller on this issue. The only rule that works 100% is that the pipe diameter should never be smaller than the drain hose. The average, most common parameter is 3.2 cm.

A dishwasher requires a 4 cm pipe.

I hope that this information will be useful for you and will help you to lay the sewer pipeline correctly. The main thing is not to forget about the correct installation technology, but this is already a topic for another article.