Category Archives: Rainwater Catchment

How-to, Rainwater Catchment, Residential Rainwater Collection

How to Maintain a Rainwater Collection System

1 Comment

How to Maintain a Rainwater Collection SystemWhether your rainwater collection system consists of simple rain barrels or whole house potable usage, maintenance of your system is essential to its successful operation. Simple tasks will keep clean water flowing for years to come with little effort.

Here are tips for how to maintain a rainwater collection system:
  • Gutters should be kept free of leaves and pine needles so as not to create tannins or discoloration of the water.
  • If possible, cisterns should be placed in a shady area so as not to promote algae growth. A screen basket at the entrance of the cistern to keep debris from entering should be cleaned as needed.
  • If a sump tank is used for transferring water to cisterns, periodic cleaning will help keep the water in the cistern cleaner.
  • Any PVC pipe should be painted for UV protection and protected from freezing.
  • Filtration elements should be changed as needed with canisters cleaned at time of changing elements.
  • If the system is for potable use, the UV bulb should be changed per manufacturers recommendations.
  • Shocking the system with chlorine during UV change will help keep the plumbing lines disinfected.
  • Finally, keeping a log of maintenance will help keep a schedule of your tasks.

You can Click Here to download a free copy of RainBank’s recommended maintenance schedule.

Rainwater Catchment, Residential Rainwater Collection

Can Average Seattle Homeowner Benefit From Rainwater Collection?

Galvanized Water TankA study by the American Water Works Association to determine end use of water in 100 single family homes was conducted back in 1999. Even though the study is dated, it is a good indicator of average single family usage with regard to rainwater collection.

The study finds that 27.7 % total household use of water is used in toilet flushing and 20.9% total household water use is by laundry facility. These uses can be improved by low usage fixtures such as dual flush toilets and front load washers, however, they do indicate an average of 48.6 % water consumption by these two fixtures.

By installing a rainwater collection system for this usage, homeowners can realize significant savings on their water and sewer bill in the Seattle area. Considering the expected price increases over the next 5 – 10 years on these utilities, a return in investment is a reasonable expectation.

New home construction in the Seattle area is required to mitigate roof runoff on impervious surfaces on site. Costs of infiltration can be expensive.  A well-designed and installed rainwater catchment system uses this runoff water for domestic use rather than infiltration. By redirecting the costs of infiltration design and construction and considering the savings on water and sewer bills, the average Seattle home owner can see a significant cost savings as well as a return on investment.

Rainwater cistern photo courtesy of water.epa.gov

Rainwater Catchment, Residential Rainwater Collection

Rainwater Collection Reduces Dependence on City Water in Seattle

Rainwater Collection Reduces Dependence on City Water in SeattleAs anyone who lives in Seattle can see, there is a massive amount of rental construction happening. With the growth of the South End of Lake Union and the Ballard area, over 23,000 units are expected to be added in the next few years.

A cultural shift in water conservation with simple technology can reduce the amounts of water usage through more effective water management practices. While the “Green Storm Water Infrastructure” or GSI mandates that runoff from impervious surfaces is to be infiltrated on site, other innovative and effective technologies are crucial in reducing the need for upgrading and expansion of sewer and centralized water systems.

Think of the reduction of the amounts of water coming off our roofs into stormwater if we diverted that water to usage such as toilet flushing and laundry facility. This practice could reduce runoff by as much as 50% in high density housing complexes, while saving hundreds of thousands of dollars that would be used to meet the demand.

Bio swells and rain gardens do very little for infiltration during the rainy periods when the ground is already saturated. Rainwater collection used for toilet and laundry facility could be using that water during those months rather than having it overflow, and it would reduce the run off during those periods.  The end product would be reduction of storm water runoff, less dependence on city water and its infrastructure, cost savings to the building owner and tenants, better use of our natural resource, while reducing pollutants in our waterways.

Photo: Aubrey Cohen, Seattlepi.com