In-line constant pressure pump is a system that integrates a circulator which treats hot and cold water within its port fittings. It is an ideal solution for civil and industrial pipe installation for heating air conditioning, refrigeration, and domestic water processing. An MCE/C inverter is incorporated to permit an array of routines according to system requirements without altering the pressure variance, making this pressure pump a flexible industrial tool. Its body and engine structure is constructed in cast iron composition, while the impeller device is made in technopolymer. It employs two M-GAS inlet and outlet, and a carbon and ceramic-based mechanized sealing.