Features:DC 12V Hot/Cooling Water Circulation pumpIf you use it 24 hours a day， it can last for 4 yearsEasy installationMax operating temperature up to 100��C with External circulating water flowSuper long working lifelow consumption & low noiseAmphibious designSubmersible installation and entirely waterproofThe pump is perfect for the family home thermal solar systems or any circulation pump application where conventional power is not availableSpecifications: Inlet/Outlet: 1/2" male thead. Fit both 1/2" NPT and BSP female thead. We've tested. Max Flow Rate: 8L/Min(2.1GPM) Max Water Head: 3 metre(9.8ft) Max system pressure: 10Bar Max circulating water temperature: 100��C/212��F. Can't be immersed in 100��C/212��F hot water Low noise: 30db at 1 metrePackage Include: 1x 12V pump 2x brass coupler 2x stainless steel clamp