Wabco 4700154000 Check Valve

Description

The Wabco 4700154000 is a check valve, designed to ensure unidirectional flow within air brake systems. This component is primarily used in trailer brake controls to prevent reverse airflow and maintain consistent braking performance. This check valve features a calculated volume of 2.452 and operates effectively between -40°C and +80°C, and supports a maximum operating pressure of 7.5/50.0 bar. Its dimensions are 109 x 125 x 180 mm, and it features M16 x 1.5, V16 x 1.5 and M10 x 1.0 port threads, and mounts via 2x Ø9.0 mm holes. This device adheres to OE specifications, offering reliability and precise functionality within the air brake system.

Key Features & Benefits

This little guy basically allows air to flow in one direction only. Think of it like a one – way street for air. It prevents air from flowing backwards through the system. It’s a pretty simple part, mechanically, but it plays a crucial role. In your trailer brake setup, it's usually placed in the supply line going to the trailer’s spring brakes. What happens is, if you lose air pressure in your towing vehicle—say, a leak or you shut the engine off—this valve keeps the air from bleeding out of the trailer’s spring brake chambers. That keeps those trailer brakes locked up. It’s a safety feature, plain and simple. Without it, your trailer’s emergency brakes might not hold properly.

Symptoms, Risks & Replacements

It’s hugely important because it's your fail – safe. It’s what keeps your trailer secure if you lose normal braking pressure. You'll notice if it’s failing because your trailer brakes might drag slightly when you do have air pressure, or worse, they might not engage fully when you need them. It acts like a shield, protecting you from a runaway trailer situation. They don’t last forever, so it's good preventative maintenance to replace them periodically. We carry a good selection of check valves – you can find them easily enough at Fixparts Online, or I can certainly look one up for your specific vehicle right here.

Warranty Information

Wabco Check Valve (MPN 4700154000) comes with a 1-year warranty.