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Rainwater Harvesting System Component Articles

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This site has hundreds of articles on rainwater harvesting. But where to start? This is the right page for those that want to design and install a system on your own.

There are hundreds of parts in a typical-sized rainwater harvesting system. With time and research most aspects of a rain water harvesting system can be figured out. Below are some articles to get started or start with the FREE Site Analyzer and save some time. >> Site Analyzer

Where Do I Start?

There are hundreds of parts in a typical-sized rainwater harvesting system. With time and research most aspects of a rain water harvesting system can be figured out. The article and tools it links to will help you get started. >> more

Depth Gauges

It is such a simple question, but sometimes not an easy question to answer. Fortunately, today there are many varieties of depth gauge options for buried and above ground tanks – from home made to high-end multi-function electronic devices. A quick review on some of the alternatives that are available may help you choose which device is best for your needs. >> more

Bladders - Another Storage Option

The tank is the most expensive component of a rainwater harvesting system. This is true whether the tank is above ground or below ground. Consequently, many people opt to undersize the tank in order to save money. Fortunately, there are alternatives to solid-walled tanks that can reduce the cost of a system.

Conveyance - Simple or Complex

Conveyance, in a rainwater harvesting system (RWH), carries the rain from the roof (i.e. the capture system) to the storage tank (i.e. the holding system). Sounds simple, but it can range from being almost nonexistent to extremely sophisticated and attractive. This article will deal with the simpler solutions.

Floating Filter Intakes

Why worry about where the water in the tank is pulled from? Isn't it all the same? The simple answer is NO. No matter how good your first flush system, if you have one at all, some particulates are going to enter the tank. Eventually, this material will settle on the bottom of the tank. So taking water off the bottom picks up these particulates. Some may be caught by an outgoing filter but this water may also contain heavy metals or chemicals which, at worst, may not always be filtered out and at best, will clog the intake filter faster.

Comparing Storage Options

Storage tanks, usually the most expensive component of the rainwater harvesting system, come in a wide variety of sizes and types. When deciding on the type of tank to use, the main factors to consider include where you live and your budget. When choosing the size of storage tank or cistern, consider several variables: rainwater supply (local precipitation), demand, projected length of dry spells without rain, catchment surface area, aesthetics, personal preference, and of course, your budget.

Pump Systems for Rainwater Catchment

Understanding how water gets from the catchment tank to the faucet can help people on rainwater catchment systems feel more comfortable with their system and be more self-reliant. A normal pump system is composed of a pump, a pressure tank, a pressure switch, and a check valve. These main components all work together automatically to supply pressurized water to your point of use.

Rainwater Harvesting - Pumps or Pressure Tanks

If you are building or planning to install a rainwater collection system, water pressure (i.e. water line pressure) is one of the main issues you need to think about. There one several ways to achieve water pressure when you turn on the faucet. One is gravity. Another is installing a pump to ensure water pressure in your water lines. If gravity does not work for you, you will need to install a pump and there are several options to consider, some new and some old.

Roof Capture Systems

You have decided to invest in a rainwater harvesting system, but where do you start? What questions do you need to answer before you can build the right system to harvest rainwater? Let’s start with learning how much rain you can collect.

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