Rainwater Accessories
Grundfos MQ series pump
This is an excellent pump for rainwater harvesting applications. It has a built in compression tank and weighs only 29 pounds making it portable if you need that for multiple tank locations. The PDF specification is below and downloadable.
| grundfos_mq_series_specification.pdf |
Divertron 1200 series submersible pump
The Divertron 1200 series is a submersible pump and sits inside your tank. It comes with a 1 inch inlet at the bottom with female threads to attach to a floating extractor, or with just a screen at the bottom without the floating extractor port. In both cases the pump is approximately 18" tall and weighs about 30 pounds. The outlet is on the top. Typically the outlet is plumbed with 1 inch schedule 40 pvc through a 1 inch bulkhead adapter in the side of the tank. Then it is plumbed to a ball valve. The pump comes with a 48 foot electric cord. There is no "on/off" switch as with the Grundfos pump discussed above. When you plug in the Divertron 1200 series it starts up and pressurizes the line to the ball valve or whatever you've plumbed it to. Once it has pressurized the line and there are no demands for water it automatically shuts down. If the valve is opened and pressure starts decreasing, the pump turns on until the line is pressurized again, when it will stop. This is a "smart" pump with controller built in. It will shut itself down if the water level falls to low.
Floating Extractor
The floating extractor consists of an air-filled ball which suspends the floating inlet filter 4" below the water's surface where the cleanest and most oxygenated water resides. An important component for any irrigation application. The device is connected to the outlet at the bottom of the tank and delivers the cleanest water possible from the tank to a gravity feed or pump application. This is another way of preventing debris which has reached the tank, from being distributed. The goal of any good RWH design is to catch and convey water at its cleanest level into the tank. This is done with the use of gutter screens, downspout filters, and first flush devices. The next potential spot in the process to filter water before it is distributed is in the tank itself. The floating extractor provides a great level of filtration by only taking in water at the cleanest level in the tank.
Leaf Solution Gutter Cover
I believe this is an excellent way to keep debris out of your gutters and therefore out of your rainwater harvesting system. Please see the Leaf Solution website at www.californialeafsolution.com . The surface is made of a fine stainless steel mesh fabric and can be installed at a reasonable cost. Installing this at the front end of your rainwater harvesting system will reduce the cost of filtering later and provide a higher quality filter as well. In addition your gutters will never get clogged with debris again! GSL has recommended Nobel Pride Roofing Company from Castroville for installation of Leaf Solution Gutter Covers. 831-384-3131
Graf Quattro Twist Downspout Filter and Diverter
Rainwater filter and diverter for round and rectangular downspouts with 1" side outlet. Patented swivel design accommodates tanks in any direction. Ships complete with 12" hose and bulkhead fitting for connection to tank or rain barrel. The device can be used so when the rain tank is full the incoming water reverses itself and overflows down through the device and into the downspout. Therefore a secondary overflow device on the tank isn't required and reduces cost.
WISY Vortex Filters
WISY Vortex Filters were designed in Germany. For 3 decades Germany has been a leader in the design and implementation of rainwater harvesting systems. The WISY filters provide first flush and fine filter mechanisms. The device includes 3 parts and is made of stainless steel. The WISY Vortex filter connects to your downspout and siphons water through the vortex filter into your rainwater storage tank.
Leaf Eater
The Leaf Eater is another pre-filter device. Water runs from the downspouts and through the Leaf Eater. The Leaf Eater has two screens. The first is a large screen that diverts leaves and other larger debris out of the device. The second screen is a fine mesh screen that catches small sediment. Both screens can be easily removed and cleaned. Generally, these should be cleaned after each rainfall. A new product the "Leaf Eater Advanced" is now available and the specification is below and downloadable. This new Leaf Eater has a single, finer mesh screen, and is virtually maintenance free.
| leaf-eater-advanced-spec-sheet-1.pdf |
First Flush Devices
There are several different first flush devices available depending on your application. Below you will see a wall hanging first flush typically mounted a Leaf Eater device. The second type further down is an "In Ground First Flush". This is used for larger roof sizes and can accommodates greater volumes of water in an efficient form factor
First Flush before assembly
When it rains, water slowly builds up in the roof gutter system before it exits through the downpipe. The first flush of water from the roof can contain amounts of bacteria from decomposed insects, skinks, bird and animal droppings and concentrated tannic acid. It may also contain sediments, water borne heavy metals and chemical residues, all of which are undesirable elements to have in a water storage system.
Instead of flowing to the water tank, these pollutants are diverted with the initial flow of water into the chamber of the water diverter. The water diverters from Rain Harvesting utilize a dependable ball and seat system - a simple automatic system that does not rely on mechanical parts or manual intervention.
As the water level in the diverter chamber rises the ball floats, and once the chamber is full, the ball rests on a seat inside the diverter chamber preventing any further water entering the diverter. The subsequent flow of water is then automatically directed along the pipe system to the tank.
For a Water Diverter to work effectively, the contaminated water in the chamber must be sealed off. This prevents the contaminated water from passing to the storage tank and ensures the water does not "syphon" off the contaminated water in the chamber. The simplest and surest way to do this is with a floating ball and seat.
A slow release valve ensures the chamber empties itself after rain and resets automatically. The diverted water need not be wasted water because the drain pipe from the diverter chamber can be fitted to a standard drip irrigation system.
Instead of flowing to the water tank, these pollutants are diverted with the initial flow of water into the chamber of the water diverter. The water diverters from Rain Harvesting utilize a dependable ball and seat system - a simple automatic system that does not rely on mechanical parts or manual intervention.
As the water level in the diverter chamber rises the ball floats, and once the chamber is full, the ball rests on a seat inside the diverter chamber preventing any further water entering the diverter. The subsequent flow of water is then automatically directed along the pipe system to the tank.
For a Water Diverter to work effectively, the contaminated water in the chamber must be sealed off. This prevents the contaminated water from passing to the storage tank and ensures the water does not "syphon" off the contaminated water in the chamber. The simplest and surest way to do this is with a floating ball and seat.
A slow release valve ensures the chamber empties itself after rain and resets automatically. The diverted water need not be wasted water because the drain pipe from the diverter chamber can be fitted to a standard drip irrigation system.
First Flush after assembly
A "First Flush" device is used to collect the initial few gallons of rainwater from your roof. This is typically the "dirtiest" water as debris left from animals, birds, insects, dust, ash etc. is washed off the roof. The "First Flush" device catches the water and keeps it out of the storage tank maintaining a much higher quality of water for further use. The diverted water is then released slowly by the device. Once the diverter is full, fresh water flows to the cistern. After the rain event the water is released slowly and the device drains until the next rain event and the whole process repeats itself.
First Flush In-Ground
The First Flush In-Ground is a good choice if you have a large roof square footage you are collecting from. The specification is below and downloadable.
| first_flush_in_ground.pdf |
Quieting Inlet
Rather than allowing incoming water to the rainwater tank splash through the bulkhead adapter to the bottom of the tank, a "quieting inlet" is used. A vertical pipe on the inside of the tank drops to the floor and then turns the water up so it doesn't splash. Doing this doesn't allow the incoming water to stir up any sediment that may have made its way into the bottom of the tank. Therefore the water quality is better and when water flows out of the tank for irrigation or other purposes, little or no sediment is present.
