Winter Preparation Tips for your Backflow Assembly

Winter weather, with its plummeting temperatures and freezing conditions, can pose significant risks to plumbing systems, particularly in the context of backflow prevention. As we delve into the intricacies of this issue, it's essential to understand how cold weather impacts backflow risks and the measures that should be taken to mitigate these risks.

Understanding Backflow and Its Risks in Winter

Backflow is a term used to describe the undesirable reversal of the flow of water or mixtures of water and other undesirable substances into the distribution pipes of the potable water system. During winter, the risk of backflow increases due to a number of factors:

Freezing Temperatures: When water freezes, it expands. This expansion can lead to increased pressure in pipes, potentially causing cracks or breaks, and this is also true for backflow assemblies.

Seasonal Shutdowns: Many irrigation systems are shut down or used less frequently during winter. Stagnant water in these systems can freeze, increasing the risk of pipe damage and backflow.

Thawing and Refreezing: Repeated cycles of water pipes freezing, thawing and refreezing can weaken pipes and backflow prevention assemblies, making them more susceptible to failure.

Preventive Measures for Backflow Assemblies in Winter

To safeguard against the heightened risk of assembly damage during winter, certain freeze prevention measures are crucial:

Reduce ground contact: In freezing temperatures moisture in the ground will freeze - including the dirt in the yard box. If there is backfill against or covering your backflow assembly this may lead to costly freeze damage. Consider removing the backfill, or contact Certified Backflow Testing to learn more about our digout service, where we also apply weed barrier and hardware cloth to minimize backfill.

Insulation of Pipes and Backflow Preventers: Insulating exposed pipes and backflow prevention assemblies can help prevent freezing. Here in the Puget Sound area, irrigation system backflow assemblies that are within in-ground yard boxes, so even inserting a large piece of insulation into the yard box and tucking it around the assembly can add to protection against freezing. 

Regular Maintenance and Inspections: Before the onset of winter, conduct thorough inspections of the backflow prevention system. Check for any damages or wear and tear, and ensure all components are functioning properly. If you see dripping water around your irrigation or backflow assembly, contact Certified Backflow Testing for repair service.

Draining Outdoor Systems: Drain water from outdoor pipes and irrigation systems. Water left in these systems can freeze and cause damage, leading to potential assembly damage. Many irrigation companies offer winterization service to ensure water is blown out of your irrigation system. 

Install Freeze Protection for Backflow Preventers: Some backflow preventers come with built-in freeze protection. Consider installing such devices, especially in areas where the temperature frequently drops below freezing. If the device doesn’t come with built in freeze protection, you can always purchase a simple heat tape at the hardware store and run an extension cord out to it when needed. 

Emergency Plans: Have an emergency plan in place in case of a ruptured water pipe incident. This should include immediate steps to take, such as shutting off the main water supply and contacting a professional plumber.

Winter brings with it a unique set of challenges for plumbing systems, and backflow assembly preparation is a critical aspect that should not be overlooked. By taking proactive steps and implementing preventive measures, the risks associated with backflow during freezing temperatures can be significantly reduced. Regular maintenance, proper insulation, and awareness can go a long way in ensuring that your water supply remains safe and uncontaminated throughout the winter months.