Watts ET-RA-85 1" Expansion Tank

The Watts ET-RA-85 is a 1" expansion tank with a 23 gallon capacity. It is rated to 125 psi.

This 23 gallon pressurized expansion tank is designed to absorb the expansion forces and control the pressure in heating and cooling systems. It is an ASME Section VIII removable bladder type precharged expansion tank. The excess water is contained in the heavy duty replaceable butyl bladder preventing tank corrosion and waterlogging problems. Maximum Pressure is 125 psi (8.5 bar).

Features

• ASME Section VIII code construction
• Heavy duty removable butyl bladder
• Precharged to 12 psi
• Carbon steel shell
• Field adjustable

Common Questions

Is it rated for potable water?

No. This is a closed-loop hydronic tank and must not be used on potable water.

What is the factory pre-charge?

It ships pre-charged to 12 psi. Match this to system fill pressure or the tank cannot accept expansion.

What size is the tank?

It holds 23 gallons.

What is it designed for?

It is intended for domestic water service.

Specifications

• Size: 1"
• Inlet Size: 1"
• Max Pressure (psi): 125
• Application: Domestic Water
• Country of Origin: United States
• Warranty: 1 Year Limited
• MPN: ET-RA-85
• Lead-Free: No
• Component Role: Expansion Tank
• Tank Volume (gal): 23
• Pre-Charge Pressure (psi): 12
• Potable Water Rated: No