Description Description The Haskel 28083-2 retainer check valve is a high-quality component that ensures reliable and safe operation of air driven liquid pumps. The valve is made of 316 stainless steel and has a pressure rating of up to 100,000 psi. The valve prevents backflow of liquid from the pump outlet to the inlet, protecting the pump from damage and reducing maintenance costs. The valve is easy to install and service, and can be accessed through the inlet check valve assembly. The Haskel 28083-2 retainer check valve is compatible with various models of Haskel 4B series air driven liquid pumps. State of California Proposition 65 WARNINGCancer and Reproductive Harm - www.P65Warnings.ca.gov. Literature & Docs Accessories