How do I prevent my fire sprinkler system from freezing during the winter? By ProMatcher Staff Updated: 05/13/2016 Get Free Quotes Today! Answer: Wey type sprinkler systems need to be enclosed and in well heated areas to avoid freezing. Bold fire protection Answer: Shut off the water supply and drain the system. Sonitrol of Ft. Lauderdale Answer: Winterize the system by a trained professional Hood Technologies Fire Safety I nc Get Free Quotes Today! Find Local Pros Free Fire Sprinkler Repair & Maintenance Cost Estimates Related Questions Can fire sprinkler heads be reused?Top answer: Never Can fire sprinkler heads be cleaned?Top answer: Yes, always Can my fire sprinkler system freeze?Top answer: Yes Can Fire Sprinkler Heads Be Painted?Top answer: No, never How much does it cost to install fire sprinklers in a house?