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Caleffi 676749A : TwisTop+ Zone Valve 1/2" Sweat 24V

Caleffi

MSRP: $274.00
Your Price:  $191.80
(You save $82.20 )
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SKU:
676749A
UPC:
8016615696677
Condition:
New
Availability:
Ships in 1 Week
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Connection1/2" Sweat
Flow Coefficient5.6 Cv
Electric Supply24 V AC/DC
Max Pressure150 psi
Warranty2-Year Limited

The Caleffi 676749A is a TwisTop+ thermo-electric zone valve with 1/2" Sweat connections, 24V.

Best for residential and light commercial zoning where silent operation matters.

Specifications sourced from Caleffi North America technical literature. Last reviewed July 2026.

Key Features

Silent Thermo-Electric Operation

A heated wax element opens the valve with no motor or gear train, so the valve is silent in occupied spaces.

Auxiliary End Switch

An auxiliary microswitch rated 5 A at 24 V confirms valve position for pump or boiler interlock.

Technical Specifications

Product TypeThermo-Electric Zone Valve
Connection Size1/2"
Connection TypeSweat
Flow Coefficient (Cv)5.6
Maximum operating pressure150 psi
Medium temperature range40 - 200 °F
Electric supply24 V AC/DC
Starting current<= 250 mA
Auxiliary microswitch contact rating (24 V)5 A
Maximum delta p35 psi
Materialbrass
SeriesTwisTop+
Shipping Weight2.2 lb

Documentation

PDF
PDF

Related Products

Frequently Asked Questions

What does Caleffi 676749A do?

It is a thermo-electric zone valve. A heated wax element opens and closes the valve on a thermostat signal, with no motor or gear train, so operation is silent.

What connection does Caleffi 676749A use?

It is supplied with 1/2" Sweat connections. Other sizes and connection styles in the range are listed under Related Products.

What supply voltage does Caleffi 676749A require?

Electric supply is 24 V AC/DC.

What is the warranty on Caleffi 676749A?

Caleffi covers this product under its standard two-year limited warranty against defects in material and workmanship from the date of shipment. ZOT Supply is an authorized Caleffi distributor.

Caleffi 2-Year Limited Warranty. Caleffi North America warrants this product to be free from defects in material and workmanship for two years from the date of shipment, when installed and operated in accordance with published instructions. ZOT Supply is an authorized Caleffi distributor with fast nationwide and international shipping.
Product Type:
Thermo-Electric Zone Valve
Product Family:
Thermo-electric Zone Valves
Series:
TwisTop+
Connection Type:
Sweat
Connection Size:
1/2 inch
Flow Coefficient:
5.6 Cv
Electric Supply:
24 V AC/DC
Max Operating Pressure:
150 psi
Medium Temperature Range:
40 - 200 deg F
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