KITZ Corp. of America offers NSF-61 approval as standard without the need to upgrade to stainless disc, on every KITZ grooved butterfly valve. They are 100% holiday tested to ensure an even nylon coating on the body. KITZ has sizes 2 through 12 inches in stock to meet your project need today! KITZ also offers an expansive BIM Library. With over 40 different models available for each valve, the company has the model users are looking for.