Watts ASM1 1 1/4 Expansion Tank, Cast Iron, FNPT

The Watts ASM1 1 1/4 is a 1-1/4" cast iron expansion tank. It features a cast iron body. Rated to 125 psi.

This 1 1/4" cast iron air separator is used in commercial and residential, hydronic heating applications to separate air from water in the piping system. It consists of a heavy, cast iron body construction with a 1/2 inch female threaded connection for an expansion tank, and a 1/8 inch female threaded connection for a float vent. It provides continuous purging and venting of air in the system when installed with Watts Model ET expansion tank and Model FV4 float-vent. The maximum pressure is 125 psi (8.6 bar).

Features

• Tappings on each side
• Heavy cast iron construction
• Provides complete, continuous purging and venting of air
• Efficient separation of air

Common Questions

What is it designed for?

It is intended for hydronic heating service.

Specifications

• Size: 1-1/4"
• Inlet Size: 1-1/4"
• Outlet Size: 1-1/4"
• Connection: FNPT
• Connection Gender: Female
• Body Material: Cast Iron
• Max Pressure (psi): 125
• Application: Hydronic Heating
• Pack Quantity: 6
• Country of Origin: India
• Warranty: 1 Year Limited
• MPN: ASM1 1 1/4
• Lead-Free: No
• Component Role: Expansion Tank