The emergence of backflow preventers has been caused by the ever growing need of their use,. In most cases, they are installed in the water system just before the isolation valve. There exists four types of these preventers that if installed, will offer you the best service. As you seek to make a decision on the kind of preventers you will attach preference to, it is important that you wholly understand the factors that need to be considered in order to meet your needs. A number of these factors will be highlighted as we discuss the various types of preventers that you may want to consider. The best of types are as illustrated below.
There is the pressure vacuum breaker that is actually relatively less costly. The fact that it does not have a complex design has made it quite a popular backflow preventer. The costs that are attached to their repair and maintenance is pretty much low. The installation of these preventers is done with adorable ease. With the bottom being at the bottom, the preventer is installed vertically. This is done at a height that is at least twelve inches from the peak of the downstream point. Remember, it is not advisable to install them at points where back pressure is inevitable. They are meant to prevent any siphoning that is done backwards and not pressure.
Then there are the double check valves. For underground and indoor installations, then the most recommended preventers are these. They are often purchased while already assembled. This comes with a sense of convenience and cost efficiency. You have the option of installing these preventers either underground or within the line itself. There is a need to have these preventers to be installed horizontally. Regardless of the presence of either back-pressure or back-siphoning, these are the kind of preventers that can be installed to counter such. This is due to the fact that they have the ability to withstand such effects.
Then, we have the pressure zone assembly. It is relatively expensive and complex too. Regardless, they stand as the most reliable and secure preventers. For as long as it is horizontal, it can either be installed underground or above the ground. The way in which they prevent back-siphoning and back-pressure is exceptional. In conclusion we look at the atmospheric vacuum breaker. Among all the others, this is the least costly. Its characteristics bear similarity with the pressure vacuum breaker. You will however, find it necessary to observe that the pressure that goes through this preventer does not go beyond twelve continuous hours. It is not so stable in handling immense back pressure.