A hydraulic connector for a circulator pump, comprising: a hollow pipe body for the flow of a fluid, said hollow pipe body comprising a suction flange portion provided at a first end of said hollow pipe body and structured for connecting to a piping system in a fluid-tight manner, said hollow pipe body further comprising an outlet section provided at a second end of said hollow pipe body, said outlet section being structured for connecting to a volute flange portion of a circulator pump in a fluid-tight manner, said outlet section comprising an outlet hole for the flow of said fluid, said hydraulic connector further comprising a connection element, said connection element being provided at said second end and being structured for providing a releasable coupling between said outlet section and said volute flange portion, said connection element further comprising a coupling flange portion having a coupling surface structured for mating with a respective mating element of a circulator pump main body, said coupling surface being structured for engaging with at least one releasable retaining element, for coupling of said outlet section with said volute flange portion, characterized in that said connection element comprises a circular shaped coupling body on said outlet section, said circular shaped coupling body being structured for engaging with a volute flange portion of a circulator pump main body, said circular shaped coupling body comprising a plurality of, preferably four, peripheral slots for receiving the releasable retaining element, said releasable retaining element being a resilient fixing clip structured for acting on the periphery of said volute flange portion. a hollow pipe body for the flow of a fluid, said hollow pipe body comprising a suction flange portion provided at a first end of said hollow pipe body and structured for connecting to a piping system in a fluid-tight manner, said hollow pipe body further comprising an outlet section provided at a second end of said hollow pipe body, said outlet section being structured for connecting to a volute flange portion of a circulator pump in a fluid-tight manner, said outlet section comprising an outlet hole for the flow of said fluid, said hydraulic connector further comprising a connection element, said connection element being provided at said second end and being structured for providing a releasable coupling between said outlet section and said volute flange portion, said connection element further comprising a coupling flange portion having a coupling surface structured for mating with a respective mating element of a circulator pump main body, said coupling surface being structured for engaging with at least one releasable retaining element, for coupling of said outlet section with said volute flange portion, characterized in that said connection element comprises a circular shaped coupling body on said outlet section, said circular shaped coupling body being structured for engaging with a volute flange portion of a circulator pump main body, said circular shaped coupling body comprising a plurality of, preferably four, peripheral slots for receiving the releasable retaining element, said releasable retaining element being a resilient fixing clip structured for acting on the periphery of said volute flange portion.