Liquiflo overflow valve A relief valve should always be installed on the pressure side of the pump. The relief valve protects the pump and the pipework from unwanted pressure increases. The valve is available in two sizes and in stainless steel AISI316 or Alloy-C. Offertförfrågan Are you interested in the product? We will contact you as soon as we receive your expression of interest. product Lämna detta fält tomt. I hereby accept Lyma's privacy policy.