Nidel Model 34HD Anti-Siphon Vacuum Breaker
From Free Knowledge Base- The DUCK Project: information for everyone
The NIDEL Model 34HD anti-siphon vacuum breaker is designed to protect hose connections from contamination where freezing temperatures are expected. Manual draining provides easy, sure drainage during cold weather. Also referred to as a Model 37HD1 Backflow Preventer it is designed for freezing areas only.
The general purpose of such a device is to prevent contamination of residential water systems. Such a device protects against cross connections and is required by code in many cities. You can help keep your home water supply safe by preventing contaminants or pollutants from entering into your potable water system with a dependable anti-siphon vacuum breaker or back flow preventer.
