Overview of Primary Product

Heat Motor Zone Valves
Application
Taco Heat Motor Zone Valves provide a convenient way to
create individual zones or equipment isolation in a hydronic
heating system. Utilizing one pump along with multiple zone
valves, flow can be started, stopped, or diverted through the
system to provide individual room or area comfort control
and energy savings. Taco offers many versions and sizes of the
Heat Motor Zone Valve to meet all your zone valve needs.
Features
• Proven Performance – Millions in Use. Taco Zone Valves
are the Industry’s Top Choice for Consistent Performance.
• Rugged Dependability
• Silent Operation
• Twist Off Head
• Bellows or Globe Valve Construction Ensures Positive
Shut-off and Leak Proof Operation
• Patented Construction
• Easy to Install
• Manual Open (Bypass) Lever
• 24 VAC Powered with Isolated End Switch
• 100% Factory Tested
• Made in the USA
• 3 Year head, 5 Year Body Warranty on the 570 Series,
1 Year Warranty on all Other Models
Choose The Right Valve For Your Application
550 Series (Models 555, 556, 557)
Designed for high head capacity applications such as
high-rise residential and commercial buildings. The
heavy-duty construction allows this series of Taco Heat
Motor Zone Valves to operate up to 150 feet of pump
head. Available in 1/2”- 1” sweat connections.
Geothermal Valves (Models 5101G, 556G, 557G)
Designed for high head, open system zone control.
The unique end switch design permits control of the
heat pump by the valve (see figure A). This allows
movement of cold water into the coil before the heat
pump actually starts. Available in 3/4” threaded, 3/4”
and 1” sweat connections.
560 Series (560, 561, 562)
A 3-Way bypass version of the 570 Gold Series.
This valve is used to control the flow to a fan coil
or terminal heating unit (see figure B). Available in
1/2” – 1” sweat connections.
570 Gold Series (570, 571, 572, 573)
The Gold Series is the industry standard for hydronic
heating applications. The quiet and dependable
operation has made this valve an industry leader for
decades. The manual open lever and twist off head
makes installation and service easy. Available in
1/2” – 1-1/4” sweat connections.
Figure B: 560 Series 3-Way Valve Piping
Figure A: Geothermal Zone Valve Wiring to a Heat Pump Control
Mounting Positions
Thermostat
Heat Pump
Control Panel