Fluid circulating apparatus

In a fluid circulating apparatus, a combination comprising a hollow housing having an inlet port and an outlet port arranged adjacent each other in a common tubular socket provided in one wall of said housing, and including internal partitions subdividing the interior of the housing into a first chamber communicating with the outlet port, and a second chamber including a first compartment communicating with said inlet port and a second compartment, said partition including a funnel-shaped member and extending transversely through said housing and having a central opening providing communication between said second compartment and said first chamber, and an inclined wall separating said first compartment from said second compartment, said funnel-shaped member extending with peripheral portion thereof through said socket and separating said ports from each other, said housing further having at least one first aperture through which fluid which enters said first compartment via said inlet port can leave said first compartment and at least one second aperture through which fluid leaving said first compartment via said first aperture can enter said second compartment;

• and a circulating pump installed in said first chamber and arranged to draw fluid through said central opening in said funnel-shaped member from said second compartment and to discharge pressurized fluid into said first chamber and from the latter through said outlet port.