How It Works

How it Works

A basic ReWater® filter package consists of a surge tank that can stand alone or be buried, a bolt-on lid that can be sealed and walked on, water-proof grommets, wastewater backflow valve, heavy-duty high pressure submersible pump, float switch, and bag filter.

Our advanced filter packages also have an outdoor-rated fiberglass sand filter system that can be fully automated, with a fresh water valve to backwash the filter vessel, a pressure-reduced valve to provide supplemental irrigation when needed, and a reduced pressure principle device to protect the fresh water supply from a reverse flow of greywater.

Larger automated filter systems for multi-family and commercial buildings are also available, as are systems that satisfy the City of Los Angeles and County of Los Angeles’ air gap requirement. All our filter systems deliver filtered greywater to our proprietary subsurface drip irrigation network that are proven to work from over 28-years of real world use.

Both filter and irrigation operations are controlled by ReWater’s Complete Control™ controller, which comes with every ReWater irrigation package. Our controller starts irrigating when water is available, sends water out to irrigation as programmed, dosing valves sequentially so that all programmed valves receive some greywater, and stops when the tank empties, holding its place in the program until more water becomes available. This process keeps the water fresh and full of oxygen, which is good for the filter, irrigation infrastructure, and plants.

Our outdoor rated 9, 12, 15, and 21-station controllers have 156 features, including 4 independently operating programs, to make sophisticated irrigation easy yet highly efficient under real-world conditions. All our controllers have the ability to automatically supplement, after midnight, any shortage of recycled water with fresh water.

Our irrigation packages come with practically all the valves, tubing, emitters, and hundreds of little fittings you need for a landscape approximately the size you’re planning, and you can customize each package. Each component has been tested over time to deliver an optimal irrigation experience over the long haul.

ReWater’s systems have been chosen by discriminating homeowners for nearly three decades because our components and methods for their assembly have been carefully selected and evolved from our extensive experience. We guarantee our systems will give you many years of trustworthy service.

The most economic way to install a ReWater system is by plumbing only the regularly-used showers, tubs, and clothes washer into our surge tank: about 95% of the reusable water comes from these few sources. Bathroom sinks produce another 3%, and guest showers, tubs, and bathroom sinks contribute the remaining small portion.


The above view is an example of what our system looks like when installed, but there are countless iterations possible, given normal plumbing scenarios, home design, and topography.

Irrigation components Filtration components
1. 1″ 24 VAC solenoid valve
2. Tees (1/2″, 3/4″, 1″ & 1 1/2″)
3. 90° elbow (1/2″, 3/4″, 1″ & 1 1/2″)
4. 45° elbow (1/2″, 3/4″, 1″ & 1 1/2″)
5. 1” threaded male adapter
6. Slip reducers (1/2″x3/4″, 3/4″x1″, & 1″x1 1/2″)
7. Reducing tees (1 1/2″x1 1/2″x1″)
8. Polyethylene tubing (1/2″, 3/4″ & 1″)
9. Polyethylene tubing Ends (1/2″, 3/4″ & 1″)
10. Emitter
11. Emitter screens
12. Controller
13. Relay junction box
A. Surge tank, 70 gallons (37″x29″)
B. Lid w/ 6 SS screws
C. Bulkhead adapters, 3 @ 2″, 1 @ 1 1/2″
G. 1 1/2″ discharge pipe
H. 3-way Tee valve with 24 VAC actuator
I. Filter vessel with PVC pipe adapters
J. 1 1/2″ solenoid valve for backwash
K. 1 1/2″ PVC swing check valve
L. Pump, 1/2 hp high pressure
M. Float switch
N . Backflow valve with viewing port
O. 1″ reduced pressure valve for irrigation supplement
P. Reverse pressure assembly
Q. Platform (optional)

For a complete list of components see our Filter Packages.  For a PDF of the diagram above, click here.

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