Item # bci2006798

Watts ETX-90 15 Gallon Non-Potable Water Expansion Tank

Model: 0066608

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Product Overview

ETX-90 Non-Potable Water Expansion Tank

Series ETX and ETSX Pressurized Expansion Tanks for Heating and Cooling Systems are designed to absorb the increased volume of water created when water is heated. These tanks maintain system pressure below the relief setting of the relief valve. The Series ETX and ETSX’s pre-pressurized steel tank features a durable expansion membrane that prevents contact of the water with the air in the tank. This rugged diaphragm minimizes loss of the air change and ensures long and trouble-free life for the system.

Watts 0066608 Features:

  • Precharged at 12psi (83 kPa)
  • Rugged flexible butyl diaphragm
  • In-line and free standing models
  • Compatible with glycol in systems
  • Constructed of steel

Watts 0066608 Specifications:

  • Height: 20-13/16"
  • Diameter: 16"
  • Capacity: 15 gallons
  • Material: Steel
  • Connection Size: 3/4"
  • Connection Type: MNPT
  • Weight: 28 lbs.

This product is listed under the following manufacturer number(s):

Dimensions and Measurements

Capacity (Gallons)
16 in.
20.813 in.
Product Weight
28 lbs.
Water Connection

Characteristics and Features

Water Connection Type

Warranty and Product Information

Lead Leaching Certified NSF/ANSI 61
N/A (Regulation does not apply)