*Astral Alaska PumpsAstral Alaska Plus Single phase pumps. These are fantastic pumps from Astral, providing great performance and reliability that you can depend on. The BSP thread on both unions gives a super tight seal. These have a plastic pump body, containing a large strainer basket with a clear perspex lid so you can easily see when this needs emptying. Supplied with a lid tool to remove the large nut holding on the lid, making these very easy to keep clean.