Watts D3803004SS 1" Flowmeter Manifold Stainless Steel 4 Port.
Photo 5 shows a manufacturers picture.

This 1 inch stainless steel manifold with 4 circuits is made of heavy-walled stainless steel and designed for radiant heating and snow melting application with water or water/glycol solutions. Standard features include flow balancing valves and flow meters on each circuit. The manifold has a maximum operating pressure of 87 psi at 167 degrees F.

Radiator systems - Floor heating systems - Zoned systems

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