Day & Night Air Conditioning & Plumbing is Backflow Testing Certified by the City of Phoenix. We are committed to protecting our Valley’s drinking water from contamination through cross-connections. We offer all aspects in relations to backflow prevention. Day & Night can provide backflow services related to the homeowners, restaurants, property management, industrial, retail, etc. We will test, repair and/or replace (installation) backflows.     Call Us Today! (602) 904-7936