NOVINO RV Vacuum Breaker Check Valve 571-VAC-CHK-A – Backflow Preventer for RV Black Tank Flush

Overview

The NOVINO RV Vacuum Breaker Check Valve (571-VAC-CHK-A) is a compact, rugged backflow preventer designed for RV black tank flush systems. It helps keep your freshwater source clean by preventing siphonage and cross-contamination during tank cleaning. If you’ve noticed loud sounds from under the sink or damp floors after flushing, this valve is positioned to address those common symptoms by stabilizing the flow and sealing against reverse flow.

Installed between the freshwater inlet and the tank flusher, the valve acts as a one-way device. Water can move toward the tank when flushing, but reverse flow is blocked, helping to maintain a stable, hygienic water supply while youCare for the tank. The design supports typical RV water pressure fluctuations and is built to perform within its specified range.

Key benefits

• Prevents backflow from the black tank flush line into the freshwater supply, protecting your drinking and cooking water.
• Reduces the risk of leaks and spray that can lead to damp RV floors during tank cleaning.
• Provides a dedicated one-way valve within the flush system, contributing to overall system reliability.
• Designed for standard 1/2” NPT male connections on both inlet and outlet for straightforward installation.

Specifications and compatibility

• OEM Part No.: 571-VAC-CHK-A
• Working water pressure range: 8-125 PSI
• Connection Type: 1/2” NPT male threads on both inlet and outlet

Usage tips and real-life scenarios

In real-world camping conditions, water pressure may vary from campsite to campsite. This valve is intended to be installed between the freshwater inlet and the black tank flusher to help maintain clean water flow and reduce backflow risk. It is appropriate for many RVs, campers, travel trailers, and motor homes, including setups from Forest River, Keystone, Winnebago, and numerous others.

• It can help address symptoms like a loud, buzzing sound under a cabinet or persistent damp floors after flushing the tank.
• It serves as a practical upgrade when replacing cracked or leaking backflow components in the black tank flush line.

Warm tips

• The valve should be installed vertically to ensure proper sealing and odor control.
• Mount at least 6 inches above the highest connected fixture where the flusher is installed.
• Avoid continuous operation beyond 12 hours to reduce the risk of sticking or shuttling.
• Use as part of a broader flush system upgrade if persistent issues persist after replacement.

With NOVINO, you gain a simple, targeted solution to support a healthier freshwater supply and reliable black tank flushing performance in your RV. This valve is designed to be an exact replacement where the original valve has cracked or leaked, offering a practical way to restore peace of mind during travels.