Although in the Roman houses bath can be already found, even in the 18th century bathroom was a luxury. Today, the choice of materials, accessories and installation options is wide. When choosing a bathtub it is necessary to choose material and bath accessories in accordance with fittings and application requirements.

This paper describes the basic concepts of pumping technology - characteristics of the pump, and resistive characteristics of system, operating point, and deals with the result effect of the series of the circulator in serial and parallel connection.

The effectiveness of a flotation separation process used in water treatment is influenced by many factors. The paper presents partial results of research on this topic, namely the saturation effect is demonstrated by the treated water and the location of the barrier between the contact and separation zone.

Meaningfulness and financial benefits of the hydraulic system of hot water and heating control are known in the general public. Less well known is need to care for such a controlled system and the possible need to streamline the already regulated system.

The article presents the current state of the issue of flat hybrid photovoltaic-thermal (FVT) collectors, focused on the differences between the basic types of collectors, their advantages and disadvantages. There is also presented an overview of the current global manufacturers. The article aims to highlight the problems but also the opportunities associated with different types of the hybrid FVT collectors.

Hydraulic control of heating systems means - except hydraulic control of central heating - hot water system control. Despite the fact that hot water system control is the duty of the law, unlike hydraulic control of heating systems that have been implemented since 1998, hot water systems are controlled sporadically.

Chemical composition of atmospheric precipitation over the territory of the Czech republic are subject to long-term monitoring. In principle, source (point and diffuse) of pollution can be divided into caused by human activities and natural resources, mostly related to aeolian activity, increased by dust or volcanic activity.

The air flotation started to use in the area of drinking water treatment at first abroad, where in the second half of last century was used as a first stage of the two-stage water treatment plant. Flotation was used first time in the Czech Republic in the water treatment plant Mostiště in 2005. At the present time this process have started to promote mainly by reconstruction of drinking water treatment plants.

In terms of energy savings Annex 11 of the Decree is very interesting. It sets the intensity of the recirculation of water for bathing and swimming pools. The requirement for continuous measurement of the intensity of recirculation and its recording for each pool separately is effective from 31^st December 2015.

According to heat need for hot water and heat loss during its generation and distribution it is determined the energy demand for heat source. Identification of hot water need and heating demand for its generation and distribution is also necessary for energy certification of buildings.

This paper addresses the use of rainwater runoff from surface to supply buildings. In the future drinking water supplies will steadily decrease but need of drinking water, given the continued growth of the population, is still rising. Although flat roofs are just a fraction of the total area of urban surface runoff, even small tanks have a favorable influence on the drainage area. Previously, it was a concrete tank, today is the most common plastic material.
The article is a contribution to the issue of the use of rain water from surface runoff for water supply buildings. It analyzes and reflects on how you can use rain water in building, the basic layout of rain water tanks and describes design method of calculating the volume of the tank and the volume of water in the tank.

The biodegradable waste is commonly contained in solid household waste. Its amount is not neglected and its value is great for reusing, so it is necessary to determine suitable systems for dealing with this specific component. The hydraulic piping system helps to solve questions about collection, sorting and transport this type of waste. The paper introduces systems for transport biodegradable waste and speaks about their advantages, disadvantages and areas of their suitable using.

Manage of rainwater is turning into ecological necessity. Altough rules for absorbing rainwater into soil is effective since 2009, rainwater is still understanded as problem, where is quick-and-cheap solution preferred. Most people doesn‘t know size of problems wich can be caused by current attitude.

This article presents monitoring of internal heat-humidity microclimate in the bathroom of a typical family house. The text presents the results of measurement confronted with the requirements of current legislation. Temperature and humidity are the basic components of internal microclimate and as such contribute significantly to indoor air quality in residential and civic buildings. If the measured room bathrooms, whose character says that it will lead to significant gains water is then necessary to pay attention to the humidity. This may be their high value negatively affect the health of users indirectly by creating conditions for development of microorganisms and fungi. High humidity also has influence on some structures, the sensitivity to this aspect of the microclimate of a variant of the materials vary. The text presents the results of measurements which took place from 19.02.2011 to 06.14.2011.

Current and future use of rainwater in urban and rural areas with a dense network of residential and industrial buildings, including paved surfaces, can be transformed from the standard of environmentally and economically non-viable leads into sewers or waterways to capture this source of water through infiltration to the soil of the specific hydrogeological site.

The paper is to highlight the cunning of material use with risk of corrosion that requires an increased measures to achieve a number of parameters in the design and operation of pipe networks. Even when all laws and regulations, guidelines or recommendations are met, life time does not reach the anticipated 50 years.

At a European level a Directive of the European Parliament and Council 2010/31/EU on the energy performance of buildings (EPBD) has been released in 2010 whereas the main requirement is to reduce energy consumption in buildings (replacing 2002/91/EC). A set of European standards have been issued for its implementation, eg EN 15232 Energy performance of buildings - Impact of automation, control and management of buildings. In the Czech Republic the Directive was implemented by Act No. 406/2000 Coll. energy management and decree 148/2007 on the energy performance of buildings. The current global trend is characterized by promoting energy efficient technologies. The aim of this work is to summarize domestic household consumption, it´s prediction and analysis of potential energy savings by using the wiring system (BACS).

The article discusses the latest findings on the genesis of disinfection by-products in connection with the use of chlorine, chlorine dioxide, ozone and UV radiation as a disinfectant.

The article is a contribution to the issue of rainwater infiltration from surface runoff and describes how to design infiltration shafts. The most important indicator is the absorption coefficient in the subsoil, respectively at the point where infiltration devices is placed. The coefficient of permeability of soil expresses the velocity in m/s, the rainwater flows through a certain type of environment, ie soil.

Some currently manufactured pipe systems have fittings thats design causes big pressure loss. It is especially fittings having a smaller internal diameter than the inner diameter of the tubes that they connect. It is necessary during the calculation to consider the actual pressure loss of fittings.