How many times can a lead gasket be reused when connecting a new chlorine cylinder?

• A. Once
• B. Twice
• C. Never
• D. Until it wears out

Answer: (C)

Handling chlorine safely means using a fresh seal every time you connect a cylinder. The lead gasket is a soft washer that’s compressed to create a tight seal between the cylinder valve and the regulator. Once it’s tightened, it takes a set to the mating surfaces and can trap tiny imperfections or contaminants. Reusing that gasket risks a leak because the seal may no longer be able to close properly after being removed and reinstalled. The serious hazards of chlorine exposure and potential equipment failure make it essential to replace the gasket each time, and then verify the connection with a leak check. So, you should never reuse a lead gasket.