Val-Matic Valve & Mfg. Corp. has launched its all-stainless steel wastewater air valves in sizes 1in-4in for single housing and sizes 1in-8in for dual housing. The thinner 316 stainless steel valve wall allows for a lightweight design reducing the weight by 20-25%, compared to the standard cast iron bodies. The valve is suitable for operation in the harshest conditions, including: grit and sewage service, desalinization, mining and leaching applications.