Rainwater System RainWaterSystem.Blog

Rainwater harvesting systems capture rainwater by directing it from large surfaces (e.g. roofs) to an underground or over-ground holding tank. The harvested rainwater is filtered and then pumped directly to the appliances or to a header tank. For more information visit &

Blueprint of Rain Water Cistern Setup:

Blueprint of Rain Water Cistern Setup:

Rainbarrel Tutorial: How to make a rain barrel
Step 1: Drill three of four holes in the barrel.  One of these is for the bibet to connect your garden house to the barrel and the other fittings will allow you to add more barrels in the future.  One of the barrels must have an overflow fitting near the top of the barrel.  If you plan on using 3/4 inch fittings use a 1 inch hole saw to cut the holes.  If you have an adjustable hole saw make it a little smaller than 1 inch.
Step 2:  Place plumbers goop on a 3/4 inch nipple. Using a 3/4 inch galvanized metal nipple and some locking pliers, thread nipple into the barrel. the hole for the fitting.  Place Plumbers goop or some other adhesive on the thread. 
Step 3: Now the real fun part.  Cut the down spout at the proper height.  You should place the rainbarrel on one or two concrete blocks and then determine the proper height.  After cutting the down spout attach the necessary elbows and extensions to have the down spout reach the barrel.  I still am trying to create a non ABS or PVC way to divert the first couple of gallons after each rainfall (this will keep the sediment from clogging up the screen).  Attach a 4 inch by 2 inch ABS plastic converter to the end of the down spout and attach a fine mesh screen over the converter (you can use a paint sprayer filter which you can get at a hardware store). 
Step 4: If you are adding more barrels do this now.  Attach a garden hose Y fitting on the 3/4 inch nipples.  Position the barrels on top of the concrete blocks and cut the right length of garden hose to connect the barrels (with male fittings attached to both ends). 
Step 5: The final product.  You must attach an overflow line on the first barrel (the one on the far right in this picture).  This must be placed near the top of the barrel and it should be attached to some form of hose or tube to discharge any overflow.   Please note that you must remove one of the two bung fittings on the top of the barrel and cover it with a small screen.  I used the paint sprayer filter with a rubber-band to hold it in place.
You can get the 55 gallon barrels for $…. at Yoshida Group out by the airport (telephone number 503-284-1114 ask to speak with shipping).  They are in the Yellow Pages.



Rainwater Harvesting System Components

Rainwater harvesting is the capture, diversion, and storage of rainwater for a number of different purposes including landscape irrigation, drinking and domestic use, aquifer recharge, and stormwater abatement.

In a residential or small-scale application, rainwater harvesting can be as simple as channeling rain running off an unguttered roof to a planted landscape area via contoured landscape. To prevent erosion on sloped surfaces, a bermed concave holding area down slope can store water for direct use by turf grass or plants. More complex systems include gutters, pipes, storage tanks or cisterns, filtering, pump(s), and water treatment for potable use.

This blog focuses on residential or small-scale commercial systems, for both irrigation and potable use. Further reading: Chapter-2: Rainwater Harvesting System Components.

The local health department and city building code officer should be consulted concerning safe, sanitary
operations and construction of these systems.

Figure 2-1. Typical rainwater harvesting installation: Blueprint:

Basic Components: Regardless of the complexity of the system, the domestic rainwater harvesting system (Figure 2-1) comprises six basic components:

#1 Catchment surface: the collection surface from which rainfall runs off
#2 Gutters and downspouts: channel water from the roof to the tank
#3 Leaf screens, first-flush diverters, and roof washers: components which remove debris and dust from the captured rainwater before it goes to the tank
#4 One or more storage tanks, also called cisterns
#5 Delivery system: gravity-fed or pumped to the end use
#6 Treatment/purification: for potable systems, filters and other methods to make the water safe to drink.

Source: The Texas Manual on Rainwater Harvesting >> Chapter-2: Rainwater Harvesting System Components.
Blog: Rainwater Blog >>