Finding the right type of shower for your installation depends entirely on your home water system. A mixer shower tends to be the most economical option, when both hot and cold water is supplied from storage cisterns. I would not worry too much about water pressure, as most showers are designed to cope with various levels of pressure. If you connect you shower directly to the mains water, as you would with an instantaneous shower, be sure to fit a double seal check valve. This will stop back siphonage, which is a common problem. If hot water is delivered to the shower via a multi-point heater, as specially designed system will have to be implemented. It’s important to check with the manufacturer before implementing such a system. Being one of the top bathroom suppliers Northern Ireland have used for a number of years, I have came into contact with these units on a number of occasions.
Bath/Shower Mixer
A very cost effective approach, these showers are as inexpensive as fitting a regular tap. The reason for this being that no extra plumbing is required to fit these showers. The temperature is controlled directly through the central heating system which supplies water to the hot and cold taps. This is not the most convenient approach but does represent a hassle free fitting.
Power Shower
An all-in-one shower which incorporates an electric pump, designed to boost the pressure of the hot water as it leaves the shower head. If the water is supplied from a combination boiler, you will have to consider another shower system, as this will only work when the water is supplied from a hot and cold water cistern. Another problem associated with power showers is waste removal. Removing the waste fast enough can be difficult and it takes a lot of careful planning to resolve this issue. On average the shower tray needs to be able to cope with 30 litres a minute.
Instantaneous Electric Shower
This type of shower is fed directly from the mains, with the water heated by an electric powered element. The higher the temperature the less pressure the water can be pushed through at. This can be an issue in cooler climates, where mains water supply can be sub-zero temperatures. Some models have a winter/summer setting, which can be set depending on the season. Designs fitted with a temperature stabiliser are a popular choice, as they cannot run too hot and they are not affected by other water use in the household. The unit must be wired to the electricity supply, so hire a trained electrician to fit the shower.
Manual and Thermostatic Mixers
These units have the hold and cold water supplies connected to a valve in the shower. In a manual mixer the temperature for hot and cold water is controlled separately, usually by hot and cold taps. Thermostatic mixers have a built in stabiliser, preventing the water from running too hot or too cold. Computerised versions of these showers have an LED display where the temperature can be set to the degree and the flow-rate can also be controlled. This type of shower can linked to a pump, to provide power shower services.
Shower Tower
This consists of a thermostatic shower that has a number of jets that spray water in a line. The shower unit also has a showerhead like conventional showers. The jets can be adjusted to vary the flow of water. These are designed to be placed in a corner unit or on a flat wall. In some instances they have been installed over a bath or in wet rooms. Most require a minimum ceiling height of 2.2m but this can vary depending on the manufacturer.
Showerheads may be fixed but are mostly connected to a flexible hose. These can be in single spray or multi-spray showerhead varieties, with the later offering a choice of spray patterns. They also come in large diameter spray options but these can be difficult to fit.
Choosing the right showerhead is as important as choosing the right shower. Acrylic trays are lightweight and durable but are relatively expensive. Stone shower trays are often heavy and difficult to install plus the floor must be perfectly level for these to be installed. Low-level trays are a popular choice, as they created easy access, walk-in showers.
Safety Warning
A showerhead that has a hose attached must be fed through a holding ring secured to the wall. This stops the showerhead hanging down in the water, which has the potential to contaminate the water. With a wet-room no shower tray is required, as the whole room is the shower-tray. A slanted floor to a drain with sealed edges helps contain the water within the room.