Diaphragm Series 4.4 gal Water Heater Expansion Tank

Part #AST12  |  Item #70599  |  Manufacturer Part #141N43

$ 95.12 EACH
(Pricing is for 4.4 gal)


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Product Details

  • For use in closed, potable hot water systems to control pressure buildup
  • Accepts expanded water as temperature rises to prevent relief valve discharge and system damage
  • Stand models designed for large residential and light commercial applications
  • Multiple units can be installed to accommodate larger systems
  • In-line models feature paten-pending Insight™ Indicator Cap that changes color to indicate tank service
  • Antimicrobial polypropylene w/anti-legionella protection liner
  • Lead-Free
  • 7-Year Limited Warranty.

Lead Law Compliant



ANSI Specifications: ANSI 61

ASME Specifications: ASME Section VIII, Division 1

Application: [Commercial, Residential]

Capacity: 4.4 gal

Coating: Urethane

Collection: Diaphragm Series

Color Finish: Tan

Color Finish Category: Neutrals

Diameter: 11 in

End Connection 1: MNPT

End Connection Location: Top

End Connections: MNPT

FM Approved: No

Fitting Size 2: 3/4 in

Height: 13 in

IAPMO Listed: Yes

Lead Law Compliant: Yes

Material: Steel

Material Type: Butyl

Maximum Pressure: 150 psi

Maximum Temperature: 200

NSF Certified: Yes

NSF Specifications: NSF 61

Product Type: In-Line

Supply Pipe Connection: 3/4 in

UL Listed: No

Water Heater Type: Commercial

Weight: 7