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GAMMA 2350L GRAVITY RAINWATER HARVESTING SYSTEMGAMMA 2350L GRAVITY RAINWATER HARVESTING SYSTEM
GAMMA 2350L GRAVITY RAINWATER HARVESTING SYSTEM
GAMMA 2350L GRAVITY RAINWATER HARVESTING SYSTEM The Gamma Rainwater Harvesting system has been designed as a low cost installation for self-build projects and residential developments. The Gamma Rainwater Harvesting System works by taking the rain from your roof gutters, filtering out leaves and debris and storing the water in an underground tank. Manufactured from tough polyethylene, the water...
from €4,520.37 ex VAT
(€5,560.06 inc VAT)
GAMMA 3100L GRAVITY RAINWATER HARVESTING SYSTEMGAMMA 3100L GRAVITY RAINWATER HARVESTING SYSTEM
GAMMA 3100L GRAVITY RAINWATER HARVESTING SYSTEM
GAMMA 3100L GRAVITY RAINWATER HARVESTING SYSTEM The Gamma Rainwater Harvesting system has been designed as a low cost installation for self-build projects and residential developments. The Gamma Rainwater Harvesting System works by taking the rain from your roof gutters, filtering out leaves and debris and storing the water in an underground tank. Manufactured from tough polyethylene, the water...
from €4,810.16 ex VAT
(€5,916.50 inc VAT)

GAMMA 4600L GRAVITY RAINWATER HARVESTING SYSTEMGAMMA 4600L GRAVITY RAINWATER HARVESTING SYSTEM
GAMMA 4600L GRAVITY RAINWATER HARVESTING SYSTEM
GAMMA 4600L GRAVITY RAINWATER HARVESTING SYSTEM The Gamma Rainwater Harvesting system has been designed as a low cost installation for self-build projects and residential developments. The Gamma Rainwater Harvesting System works by taking the rain from your roof gutters, filtering out leaves and debris and storing the water in an underground tank. Manufactured from tough polyethylene, the water...
from €5,309.89 ex VAT
(€6,531.16 inc VAT)
GAMMA 2350L DIRECT RAINWATER HARVESTING SYSTEMGAMMA 2350L DIRECT RAINWATER HARVESTING SYSTEM
GAMMA 2350L DIRECT RAINWATER HARVESTING SYSTEM
GAMMA 2350L DIRECT RAINWATER HARVESTING SYSTEM The Gamma Rainwater Harvesting system has been designed as a low cost installation for self-build projects and residential developments. The Gamma Rainwater Harvesting System works by taking the rain from your roof gutters, filtering out leaves and debris and storing the water in an underground tank. Manufactured from tough polyethylene, the water...
from €4,520.37 ex VAT
(€5,560.06 inc VAT)

GAMMA 3100L DIRECT RAINWATER HARVESTING SYSTEMGAMMA 3100L DIRECT RAINWATER HARVESTING SYSTEM
GAMMA 3100L DIRECT RAINWATER HARVESTING SYSTEM
GAMMA 3100L DIRECT RAINWATER HARVESTING SYSTEM The Gamma Rainwater Harvesting system has been designed as a low cost installation for self-build projects and residential developments. The Gamma Rainwater Harvesting System works by taking the rain from your roof gutters, filtering out leaves and debris and storing the water in an underground tank. Manufactured from tough polyethylene, the water...
from €4,810.16 ex VAT
(€5,916.50 inc VAT)
GAMMA 4600L DIRECT RAINWATER HARVESTING SYSTEMGAMMA 4600L DIRECT RAINWATER HARVESTING SYSTEM
GAMMA 4600L DIRECT RAINWATER HARVESTING SYSTEM
GAMMA 4600L DIRECT RAINWATER HARVESTING SYSTEM The Gamma Rainwater Harvesting system has been designed as a low cost installation for self-build projects and residential developments. The Gamma Rainwater Harvesting System works by taking the rain from your roof gutters, filtering out leaves and debris and storing the water in an underground tank. Manufactured from tough polyethylene, the water...
from €5,309.89 ex VAT
(€6,531.16 inc VAT)

AQUABANK 1000AQUABANK 1000
AQUABANK 1000
AQUABANK 1000 The Klargester Aquabank rainwater harvesting system is designed with simplicity in mind. The Aquabank is suitable for single residential applications. It uses cohesive design with the system controlled by a pump, with options for either direct or gravity fed applications. It's a highly intuitive system easy to use with no need for a control panel, display panel or depth sensor....
from €3,249.37 ex VAT
(€3,996.73 inc VAT)
AQUABANK 2800AQUABANK 2800
AQUABANK 2800
AQUABANK 2800 The Klargester Aquabank rainwater harvesting system is designed with simplicity in mind. The Aquabank is suitable for single residential applications. It uses cohesive design with the system controlled by a pump, with options for either direct or gravity fed applications. It's a highly intuitive system, easy to use with no need for a control panel, display panel or depth sensor....
from €4,520.37 ex VAT
(€5,560.06 inc VAT)

AQUABANK 3800AQUABANK 3800
AQUABANK 3800
AQUABANK 3800 The Klargester Aquabank rainwater harvesting system is designed with simplicity in mind. The Aquabank is suitable for single residential applications. It uses cohesive design with the system controlled by a pump, with options for either direct or gravity fed applications. It's a highly intuitive system, easy to use with no need for a control panel, display panel or depth sensor....
from €4,810.16 ex VAT
(€5,916.50 inc VAT)
AQUABANK 4600AQUABANK 4600
AQUABANK 4600
AQUABANK 4600 The Klargester Aquabank rainwater harvesting system is designed with simplicity in mind. The Aquabank is suitable for single residential applications. It uses cohesive design with the system controlled by a pump, with options for either direct or gravity fed applications. It's a highly intuitive system, easy to use with no need for a control panel, display panel or depth sensor....
from €5,086.27 ex VAT
(€6,256.11 inc VAT)

AQUABANK 6000AQUABANK 6000
AQUABANK 6000
AQUABANK 6000 The Klargester Aquabank rainwater harvesting system is designed with simplicity in mind. The Aquabank is suitable for single residential applications. It uses cohesive design with the system controlled by a pump, with options for either direct or gravity fed applications. It's a highly intuitive system, easy to use with no need for a control panel, display panel or depth sensor....
from €5,309.89 ex VAT
(€6,531.16 inc VAT)
1500L Platin Indirect Rainwater Harvesting System1500L Platin Indirect Rainwater Harvesting System
New
1500L Platin Indirect Rainwater Harvesting System
1500L Platin Indirect Rainwater Harvesting System The 5000L Platin Indirect Rainwater Harvesting System is a reliable domestic solution for rainwater collection with submersible pump and header tank system that is suitable for use with toilets, washing machines, garden watering, pressure washing and car washing. Benefits: Simple & quick to install Submersible pump supplies harvested...
from €1,555.00 ex VAT
(€1,912.65 inc VAT)

3000L Platin Indirect Rainwater Harvesting System3000L Platin Indirect Rainwater Harvesting System
New
3000L Platin Indirect Rainwater Harvesting System
3000L Platin Indirect Rainwater Harvesting System The 3000L Platin Indirect Rainwater Harvesting System is a reliable domestic solution for rainwater collection with submersible pump and header tank system that is suitable for use with toilets, washing machines, garden watering, pressure washing and car washing. Benefits: Simple & quick to install Submersible pump supplies harvested...
from €1,890.00 ex VAT
(€2,324.70 inc VAT)
5000L Platin Indirect Rainwater Harvesting System5000L Platin Indirect Rainwater Harvesting System
New
5000L Platin Indirect Rainwater Harvesting System
5000L Platin Indirect Rainwater Harvesting System The 5000L Platin Indirect Rainwater Harvesting System is a reliable domestic solution for rainwater collection with submersible pump and header tank system that is suitable for use with toilets, washing machines, garden watering, pressure washing and car washing. Benefits: Simple & quick to install Submersible pump supplies harvested...
from €2,270.00 ex VAT
(€2,792.10 inc VAT)

7500L Platin Indirect Rainwater Harvesting System7500L Platin Indirect Rainwater Harvesting System
New
7500L Platin Indirect Rainwater Harvesting System
7500L Platin Indirect Rainwater Harvesting System The 5000L Platin Indirect Rainwater Harvesting System is a reliable domestic solution for rainwater collection with submersible pump and header tank system that is suitable for use with toilets, washing machines, garden watering, pressure washing and car washing. Benefits: Simple & quick to install Submersible pump supplies harvested...
from €2,980.00 ex VAT
(€3,665.40 inc VAT)
1500L Platin Garden Comfort Rainwater Harvesting System1500L Platin Garden Comfort Rainwater Harvesting System
1500L Platin Garden Comfort Rainwater Harvesting System
1500L PLATIN GARDEN COMFORT RAINWATER HARVESTING SYSTEM This 1500L Platin Garden Comfort Rainwater Harvesting System is an underground rainwater system that is simple to install thanks to the integrated filter technology. This rainwater harvesting system is suitable for garden watering, car washing and power washing. It is the convenient solution with automatic submersible pump. Benefits: Draws...
from €1,355.00 ex VAT
(€1,666.65 inc VAT)

3000L Platin Garden Comfort Rainwater Harvesting System3000L Platin Garden Comfort Rainwater Harvesting System
3000L Platin Garden Comfort Rainwater Harvesting System
3000L PLATIN GARDEN COMFORT RAINWATER HARVESTING SYSTEM This 3000L Platin Garden Comfort Rainwater Harvesting System is an underground rainwater system that is simple to install thanks to the integrated filter technology. This rainwater harvesting system is suitable for garden watering, car washing and power washing. It is the convenient solution with automatic submersible pump. Benefits: Draws...
from €1,695.00 ex VAT
(€2,084.85 inc VAT)
5000L Platin Garden Comfort Rainwater Harvesting System5000L Platin Garden Comfort Rainwater Harvesting System
5000L Platin Garden Comfort Rainwater Harvesting System
5000L PLATIN GARDEN COMFORT RAINWATER HARVESTING SYSTEM This 5000L Platin Garden Comfort Rainwater Harvesting System is an underground rainwater system that is simple to install thanks to the integrated filter technology. This rainwater harvesting system is suitable for garden watering, car washing and power washing. It is the convenient solution with automatic submersible pump. Benefits: Draws...
from €2,025.00 ex VAT
(€2,490.75 inc VAT)

7500L Platin Garden Comfort Rainwater Harvesting System7500L Platin Garden Comfort Rainwater Harvesting System
7500L Platin Garden Comfort Rainwater Harvesting System
7500L PLATIN GARDEN COMFORT RAINWATER HARVESTING SYSTEM This 7500L Platin Garden Comfort Rainwater Harvesting System is an underground rainwater system that is simple to install thanks to the integrated filter technology. This rainwater harvesting system is suitable for garden watering, car washing and power washing. It is the convenient solution with automatic submersible pump. Benefits: Draws...
from €2,656.00 ex VAT
(€3,266.88 inc VAT)
1500L Platin Eco-Plus Rainwater Harvesting System1500L Platin Eco-Plus Rainwater Harvesting System
1500L Platin Eco-Plus Rainwater Harvesting System
1500L PLATIN ECO-PLUS RAINWATER HARVESTING SYSTEM The 1500L Platin Eco-Plus rainwater Harvesting system is an underground rainwater system that is suitable for use with toilets, washing machines, garden watering, pressure washing and car washing. The Platin Eco-Plus Rainwater Harvesting System is a low cost complete solution for home and garden. Benefits: Low cost complete solution Patented...
from €1,845.00 ex VAT
(€2,269.35 inc VAT)

3000L Platin Eco-Plus Rainwater Harvesting System3000L Platin Eco-Plus Rainwater Harvesting System
3000L Platin Eco-Plus Rainwater Harvesting System
3000L PLATIN ECO-PLUS RAINWATER HARVESTING SYSTEM The 3000L Platin Eco-Plus rainwater Harvesting system is an underground rainwater system that is suitable for use with toilets, washing machines, garden watering, pressure washing and car washing. The Platin Eco-Plus Rainwater Harvesting System is a low cost complete solution for home and garden. Benefits: Low cost complete solution Patented...
from €2,230.00 ex VAT
(€2,742.90 inc VAT)
5000L Platin Eco-Plus Rainwater Harvesting System5000L Platin Eco-Plus Rainwater Harvesting System
5000L Platin Eco-Plus Rainwater Harvesting System
5000L PLATIN ECO-PLUS RAINWATER HARVESTING SYSTEM The 5000L Platin Eco-Plus rainwater Harvesting system is an underground rainwater system that is suitable for use with toilets, washing machines, garden watering, pressure washing and car washing. The Platin Eco-Plus Rainwater Harvesting System is a low cost complete solution for home and garden. Benefits: Low cost complete solution Patented...
from €2,530.00 ex VAT
(€3,111.90 inc VAT)

7500L Platin Eco-Plus Rainwater Harvesting System7500L Platin Eco-Plus Rainwater Harvesting System
7500L Platin Eco-Plus Rainwater Harvesting System
7500L PLATIN ECO-PLUS RAINWATER HARVESTING SYSTEM The 7500L Platin Eco-Plus rainwater Harvesting system is an underground rainwater system that is suitable for use with toilets, washing machines, garden watering, pressure washing and car washing. The Platin Eco-Plus Rainwater Harvesting System is a low cost complete solution for home and garden. Benefits: Low cost complete solution Patented...
from €3,130.00 ex VAT
(€3,849.90 inc VAT)
1500L Platin House Professional Rainwater Harvesting System1500L Platin House Professional Rainwater Harvesting System
1500L Platin House Professional Rainwater Harvesting System
1500L Platin House Professional Rainwater Harvesting System The 1500L Platin House Professional rainwater harvesting system is ideal for both home and garden use. This rain water sytem also includes an in-house drinking water intake with submersible pump. It is ideal when there are larger distances (15 m (49' 3")) between the tank and the domestic waterworks. Professional solution...
from €2,425.00 ex VAT
(€2,982.75 inc VAT)

3000L Platin House Professional Rainwater Harvesting System3000L Platin House Professional Rainwater Harvesting System
3000L Platin House Professional Rainwater Harvesting System
3000L Platin House Professional Rainwater Harvesting System The 3000L Platin House Professional rainwater harvesting system is ideal for both home and garden use. This rain water sytem also includes an in-house drinking water intake with submersible pump. It is ideal when there are larger distances (15 m (49' 3")) between the tank and the domestic waterworks. Professional solution...
from €2,775.00 ex VAT
(€3,413.25 inc VAT)
5000L Platin House Professional Rainwater Harvesting System5000L Platin House Professional Rainwater Harvesting System
5000L Platin House Professional Rainwater Harvesting System
5000L Platin House Professional Rainwater Harvesting System The 5000L Platin House Professional rainwater harvesting system is ideal for both home and garden use. This rain water sytem also includes an in-house drinking water intake with submersible pump. It is ideal when there are larger distances (15 m (49' 3")) between the tank and the domestic waterworks. Professional solution...
from €3,100.00 ex VAT
(€3,813.00 inc VAT)

7500L Platin House Professional Rainwater Harvesting System7500L Platin House Professional Rainwater Harvesting System
7500L Platin House Professional Rainwater Harvesting System
7500L Platin House Professional Rainwater Harvesting System The 7500L Platin House Professional rainwater harvesting system is ideal for both home and garden use. This rain water sytem also includes an in-house drinking water intake with submersible pump. It is ideal when there are larger distances (15 m (49' 3")) between the tank and the domestic waterworks. Professional solution...
from €3,740.00 ex VAT
(€4,600.20 inc VAT)
1000L GARDEN ANGEL1000L GARDEN ANGEL
New
1000L GARDEN ANGEL
1000L GARDEN ANGEL The Garden Angel range of rainwater harvesters is a compact, simple and cost effective system designed to make it as easy as possible for the home owner to install. We have stripped away all complicated aspects of most systems currently available on the market. Simply connect power and discharge pipeline, and the system will delivery pressurised, filtered harvested rainwater...
€1,760.26 ex VAT
(€2,165.12 inc VAT)

1400L GARDEN ANGEL1400L GARDEN ANGEL
New
1400L GARDEN ANGEL
1400L GARDEN ANGEL The Garden Angel range of rainwater harvesters is a compact, simple and cost effective system designed to make it as easy as possible for the home owner to install. We have stripped away all complicated aspects of most systems currently available on the market. Simply connect power and discharge pipeline, and the system will delivery pressurised, filtered harvested rainwater...
€1,853.86 ex VAT
(€2,280.25 inc VAT)
2200L GARDEN ANGEL2200L GARDEN ANGEL
New
2200L GARDEN ANGEL
2200L GARDEN ANGEL The Garden Angel range of rainwater harvesters is a compact, simple and cost effective system designed to make it as easy as possible for the home owner to install. We have stripped away all complicated aspects of most systems currently available on the market. Simply connect power and discharge pipeline, and the system will delivery pressurised, filtered harvested rainwater...
€1,980.29 ex VAT
(€2,435.76 inc VAT)

2400L GARDEN ANGEL2400L GARDEN ANGEL
New
2400L GARDEN ANGEL
2400L GARDEN ANGEL The Garden Angel range of rainwater harvesters is a compact, simple and cost effective system designed to make it as easy as possible for the home owner to install. We have stripped away all complicated aspects of most systems currently available on the market. Simply connect power and discharge pipeline, and the system will delivery pressurised, filtered harvested rainwater...
€2,031.20 ex VAT
(€2,498.38 inc VAT)
3300L GARDEN ANGEL3300L GARDEN ANGEL
New
3300L GARDEN ANGEL
3300L GARDEN ANGEL The Garden Angel range of rainwater harvesters is a compact, simple and cost effective system designed to make it as easy as possible for the home owner to install. We have stripped away all complicated aspects of most systems currently available on the market. Simply connect power and discharge pipeline, and the system will delivery pressurised, filtered harvested rainwater...
€2,784.90 ex VAT
(€3,425.43 inc VAT)

4000L RAINBANK
4000L RAINBANK
4000L RAINBANK The 4000L Rainbank Rainwater Harvesting System is a complete concrete system. How Does It Work: The rainwater from the roof is channelled through the downpipes into a vortex filter which eliminates leaves and other debris before entering the tank through a calmed inlet. This water is then pumped on demand into a header tank in the house or garage for distribution to selected...
€3,146.00 ex VAT
(€3,869.58 inc VAT)
8000L RAINBANK
8000L RAINBANK
8000L RAINBANK The 8000L Rainbank Rainwater Harvesting System is a complete concrete system. How Does It Work: The rainwater from the roof is channelled through the downpipes into a vortex filter which eliminates leaves and other debris before entering the tank through a calmed inlet. This water is then pumped on demand into a header tank in the house or garage for distribution to selected...
€3,500.00 ex VAT
(€4,305.00 inc VAT)

1500L HYDROSTORE GARDEN HARVEST
1500L HYDROSTORE GARDEN HARVEST
Please ask about lead times prior to purchasing.
€2,480.65 ex VAT
(€3,051.20 inc VAT)
2900L HYDROSTORE GARDEN HARVEST
2900L HYDROSTORE GARDEN HARVEST
Please ask about lead times prior to purchasing.
€2,938.71 ex VAT
(€3,614.61 inc VAT)

1500L HYDROSTORE HOME HARVEST DIRECT
1500L HYDROSTORE HOME HARVEST DIRECT
Please ask about lead times prior to purchasing.
€2,880.65 ex VAT
(€3,543.20 inc VAT)
2900L HYDROSTORE HOME HARVEST DIRECT
2900L HYDROSTORE HOME HARVEST DIRECT
Please ask about lead times prior to purchasing.
€3,429.03 ex VAT
(€4,217.71 inc VAT)

RAINSTORE 10000LRAINSTORE 10000L
RAINSTORE 10000L
RAINSTORE 10000L The Kingspan RainStore Above Ground Retrofit Rainwater Storage System is a free standing water tank that requires no specialist installation and come in sizes that will really make a difference to metered properties and areas prone to water restrictions in summer months. The RainStore Range of rotationally moulded storage tanks are tough, durable and built to last.These water...
€2,492.60 ex VAT
(€3,065.90 inc VAT)
RAINSTORE 5000LRAINSTORE 5000L
RAINSTORE 5000L
RAINSTORE 5000L The Kingspan RainStore Above Ground Retrofit Rainwater Storage System is a free standing water tank that requires no specialist installation and come in sizes that will really make a difference to metered properties and areas prone to water restrictions in summer months. The RainStore Range of rotationally moulded storage tanks are tough, durable and built to last.These water...
€2,045.22 ex VAT
(€2,515.62 inc VAT)

3/4' X 1' ANGLE TUNDISH FUNNEL
3/4' X 1' ANGLE TUNDISH FUNNEL
3/4" X 1" ANGLE TUNDISH FUNNEL Tundish valve for rainwater direct systems
€31.78 ex VAT
(€39.09 inc VAT)
EBARA IDROGO AUTO PUMP
EBARA IDROGO AUTO PUMP
EBARA IDROGO AUTO PUMP The IDROGO M 40/08 is a 5" submersible centrifugal multistage pump made of stainless steel AISI 304. APPLICATIONS Moving clear water from wells & cisterns. Pressure boosting domestic plants Small-sale irrigation Rainwater Harvesting Washing vehicles General pressure increases TECHNICAL DETAILS Equipped with twin mechanical...
€481.25 ex VAT
(€591.94 inc VAT)

EBARA MULTIGO PUMP M40/08
EBARA MULTIGO PUMP M40/08
EBARA MULTIGO PUMP M40/08 This is a Multigo 40/08 Vertical multistage centrifugal electric pump (AISI 304) APPLICATIONS • Flooded areas • Boosting of hydraulic plants • Fountains • Rainwater Harvesting • Allotments & Gardens TECHNICAL DETAILS • Quiet & Reliable • Moving water cools the motor • Durability ensured by interposed...
€619.18 ex VAT
(€761.59 inc VAT)
INLINE FILTER 3/4' FOR ENVIREAU
INLINE FILTER 3/4' FOR ENVIREAU
INLINE FILTER 3/4" FOR ENVIREAU Used for: Kingspan Water Envireau. This is a 150 micron filter which filters water before it reaches pressure transducer.
€50.40 ex VAT
(€61.99 inc VAT)

RAINWATER PUMP MESH FILTER
RAINWATER PUMP MESH FILTER
RAINWATER PUMP MESH FILTER 200 micron steel mesh filter to fit Divatronix Manifold (part code: 0019288), to fit Ebara Multigo Pump ( Product Code: 0012115)
€60.52 ex VAT
(€74.44 inc VAT)
X-AJE80P STEEL WATER PUMP
X-AJE80P STEEL WATER PUMP
X-AJE80P STEEL WATER PUMP This water pump is a self priming centrifugal jet pump with or without electronic pressure control, single or 3 phase. For submerged, underground or surface mounting. The X-AJE80P water pumps are suitable for domestic boosting, rainwater harvesting, surface irrigation and tank transfer. This automatic version includes pressure control, anti-blocking system, leak detection,...
€328.88 ex VAT
(€404.52 inc VAT)

RAIN STORE FILTERRAIN STORE FILTER
RAIN STORE FILTER
RAIN STORE FILTER This rainwater filter can be used for installation within rainwater tanks or before the tank. The high level of rainwater filtering efficiency is due to it's two step cleaning system, independent of flow rate. Due to the steep inclination of the rainwater filter cartridge, the dirt is continuously cleaned away into the sewer. This rainwater filter is frost resistant...
€291.50 ex VAT
(€358.55 inc VAT)
3P COMPACT FILTER3P COMPACT FILTER
3P COMPACT FILTER
3P COMPACT FILTER This rainwater harvesting filter is 3P Techniks smallest rainwater filter for installation within rainwater tanks. The 3P Compact Filter is ideal where there is little room and no height difference between inlet and outlet on the water tank. This rainwater filter is low maintenance, depending on level of solids in the incoming rainwater. The cleaned rainwater can be used...
€174.81 ex VAT
(€215.02 inc VAT)
Page: 1 | 2 |
FAQs

What can I use rainwater for?

Rainwater can be used for all outdoor uses; watering the garden, washing cars, cleaning down patios, driveways, walls etc, and ornamental ponds. It can also be used inside the house to flush toilets and feed washing machines. Rainwater use means less build-up of calcium deposits in appliances.

Rainwater is not suitable for drinking or for use in showers and baths. Rainwater is generally free of harmful minerals and in most cases chemicals but can be adversely effected by air pollutants and/0r contamination by animals in the catchment area. The only way rainwater can be used for drinking water is if it is treated by ultra-violet filters which are not practical in domestic use as generally a rainwater tank will not store enough water for total consumption in a domestic situation.

What size rainwater harvesting tanks do I need?

The size of a rainwater holding tank must match the demand for water with it’s availability as closely as possible.

BS 8515:2009 provides an authoritative and industry-approved means of calculating the optimum size of tank for household water use.

Unlike other industries it is better to reduce the size of the tank rather than over size it if in doubt as to the requirement. This is due to the benefit of allowing the tank to overflow at least twice a year to flush out floating debris. The tank chosen must therefore be a balance between rainwater supply and water demand.

In order to correctly size the tank, the capacity should be the lesser of either the rainwater supply or the water demand. A worked example demonstrating this principle is shown below:-

tank_size

Are rainwater tanks worth it?

There are many reasons why using a water butt is a good idea. By collecting rainwater a water butt,  you are using a free natural resource. This puts less pressure on an already under pressure water system and reduces the demand put on the public water system. By collecting rainwater, less water goes down the storm drains and eliviates pressur on the public drainage system and help to prevent flooding. An added bonus to using rainwater for watering your plants is that the plants love natural rainwater with no chemicals added.