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Using Zone Valves and Circulating Pumps in a Heating System

This is an example of how to use zone valves and Pumps for a heating system.

You will notice that in the Picture Below there are 8 zones with 4 Zone Valves the other zones appear to be always feed when the boiler is on. (All this is on a Secondary Loop) But, there could be a mixing station higher up that controls the flow and tempeature - but this is not show in this picture. You will also see that one zone is going to a PEX Manifold with 9 loops. There does not appear to be a mixing valve thus we can assume that this manifold get the water at boiler tempeature.

Heating with Zone Valves and Circulating Pumps

This is only an example. Actual layouts vary from job to job. 

List of materials needed for a project like this (Click Link below to Purchase Product and see more Information)

Hydronic Heating Side (Trim)

Quantity 1 - Gas or Electric Heating Boilers

Quantity 4 - Zone Valves

Quantity 15 + - Ball Valves for Hydronic Heating Side

Quantity X - Boiler Drain and Hose Bibs

Quantity  3+ - Temperature Guages and Tees

Quantity 1 - Hydronic Heating Expansion Tanks

Quantity 3 - Cast Iron Pump (For Primary and Secondary Loop - Amount of Pumps Depends on System)

Quantity 3 - Pump Flanges (For Secondary Loop Side and Most Likely 3/4 Inch)

Qunatity 1 - Zone Valve Controllers

Qunatity 1 - Pump Relay

Quantity X - Hydronic Heating Thermostats and Floor Sensors

Quantity 1 - Hydronic BackFlow Preventers and Combo AutoFill Valves

Quantity 1 - Hydronic Air Eliminators, Air Separators, Air Scoops and Dirt Separators

Quantity 1 - Hydronic Boiler Pressure Relief Valves and Water Heater Relief Valves

Quantity 1 - Taco Flo Checks Valves


Hydronic Heating Side (Distribution)

Quantity X - Hydronic Radiant Heat Pex Tubing (Depends on Systyem)

Quantity X - Hydronic Radiators and Convectors (Depends on System)

Quantity X - Hydronic Baseboards (Depends on System)


X = Various Amounts of Product needed - dependant on actual system