The C-Systems CSP750 Brushless DC Pump consists of two pieces which make up the composition of the unit. There are a series of four pre-drilled holes that penetrate both surfaces and are specifically used for keep the pump assembled and water tight. All four screws can be easily removed using an Allen Key for easy maintenance. During an inspection, I did note that the four screws in each corner of the pump were a little worse for wear and had rusted in some areas. I contacted Dan at C-Systems and was advised that the units that were provided for review are bench pumps that had been submerged underwater for testing and that new pumps will not have this problem. I will be replacing the screws with suitable alternatives before I put this pump into long term use. At the top of the CSP750 are inlet and outlet ports that are CNC helical machined to 1/4" NPT. This provides for the use of both plastic and metal tubing adapters, typically without the need of additional sealing. Consumers have the option of using 1/4" NPT adapters for configuring a water cooling system to use 3/8" or 1/2" ID tubing.