One of the most prominent signs of a faulty check valve is a soft brake pedal. This means that you will have to exert more force on the brake pedal for the vehicle to come to a stop, which is not only inconvenient but also poses a safety risk. If you notice that your brake pedal feels spongy or takes longer to respond, it is essential to have the check valve checked as soon as possible.

Another sign of a faulty check valve is a hissing or whooshing sound coming from the brake booster area. This sound is produced when air starts to leak into the vacuum hose, which affects the brake booster's performance. If this happens, the brake booster will not be able to supply enough power to the braking system to provide consistent stopping power.
A leaking check valve can also cause the brake pedal to become unresponsive. The brake pedal may go all the way to the floor without providing enough stopping power to the vehicle. This can be a scary situation for any driver, especially when driving at high speeds or in traffic.
In many cases, a faulty check valve can also result in increased stopping distances, which is a serious safety concern. This means that your vehicle will take longer to stop, which can result in accidents or collisions. If you notice that your vehicle's stopping distance has increased, it's advisable to have the check valve checked by a qualified technician.
One of the most effective ways to prevent a faulty check valve is by performing regular maintenance on your vehicle's brake system. This includes checking the brake fluid level, brake hoses, and brake pads for signs of wear or damage. It's also important to have your vehicle's brake system inspected by a qualified technician at least once a year.
In conclusion, a faulty check valve on the power vacuum brake booster can have serious consequences on your vehicle's braking system's performance. If you notice any of the signs mentioned above, such as a soft brake pedal, hissing sound, unresponsive brake pedal, or increased stopping distance, it's critical to have your vehicle inspected by a qualified technician to determine if the check valve needs to be replaced. By taking the necessary precautions and performing regular maintenance, you can help ensure your vehicle's braking system functions correctly, keeping you and others on the road safe. Remember, Red Jacket Check Valve is an essential part of your braking system, so never overlook its importance.