With what should connections be checked after installation?

Checking connections after installation is vital to ensure there are no leaks in a compressed natural gas (CNG) system. The use of a non-ammonia soap solution or a leak detection instrument is the most effective method for this purpose.

A non-ammonia soap solution can form bubbles when it comes into contact with escaping gas, which provides a clear visual indication of any leaks. It's important to avoid ammonia-based solutions because they can react with certain materials used in the connections and potentially cause damage or degrade performance.

Moreover, using a specialized leak detection instrument can offer even more precise measurements and assessments of any potential gas leaks. Such instruments are designed specifically for detecting gases and can help ensure the safety and integrity of the CNG system.

In contrast, alternatives such as vinegar solutions, water and soap mixtures, or compressed air pressure do not provide the same reliability or effectiveness in detecting leaks. Vinegar and water/soap solutions might not produce noticeable results as reliably as non-ammonia soap. Compressed air pressure is not appropriate because it could potentially force gas through gaps or openings, creating safety hazards rather than assessing for leaks.