Preparing Your Rainwater Harvesting System for Freezing Temperatures

Year-round potable rainwater supply systems exist throughout the world and can be installed using proven techniques. Our experts at Rain Harvest Systems are experienced in a variety of installations, but sometimes Mother Nature throws us a cold curve ball. If you’ve got a system which provides water primarily during the warmer months, here’s an overview of basic techniques for freeze prevention.

Freezing temperatures can be destructive to a rainwater harvesting system if water in the pump and pipes are allowed to freeze. If not completely evacuated or otherwise kept warm, there is always a risk of pumps, pipes and system components freezing and bursting. If the system is below ground, freezing temperatures are of little concern, provided that you know your frost line and bury your lines below the frost line. Only when dealing with above ground systems does the harsh cold of winter play a significant role. One simple way of handling the winter is to simply winterize your system.

Don’t let this happen to your above-ground water tank!

In order to winterize your system, several things need to be done:

* First, your tank needs to be emptied of any water unless you are certain it’s been installed in a manner to prevent freeze damage.

* Make sure that there is no standing water in any of your conveyance piping.

* Stop diverting any water toward your tank and allow it to flow straight down your downspout. If you are using the Graf Quattro Twist or the RainHarvesting Clean Rain Ultra, this is as simple as flipping a switch. When using other setups this process may involve other methods usually described in the user manual.

* If you prefer, several solutions are available to allow the system to be used year-round. In order to ensure that the water in your tank does not freeze you can add an aerator. What this does is produce a steady stream of air that keeps the water moving to ensure it does not have time to settle and freeze.

* Another option is to use a heat pump that recirculates hot water into the system. If you plan to use your system year round it is imperative to ensure that your conveyance piping has the proper fall so that there will never be any standing water in your pipes.

Frozen pipes can create expensive damage to a rainwater harvesting system, so practice preventive maintenance.

Another key consideration is the placement of your pump and the routing of the pump supply line. Your pump must be kept above freezing temperatures at all times or it must be completely drained and winterized. The supply line must also be buried below the frost line to ensure that your water delivery piping does not freeze and crack during the deep freeze of winter.

Freezing temperatures can take even sub-tropical dwellers by surprise. By taking these steps you can be confident that your rainwater harvesting system will work effectively throughout the year. Preventive maintenance is the key!

By following Rain Harvest Systems on Facebook or Twitter, you’ll stay up-to-date on the latest rainwater and greywater management and treatment systems. We also feature water-saving recycling and gardening tips, plus news on environmental issues that affect our everyday lives. Join the conversation!