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3/4 MNPT Potable Water Expansion Tank
One Year Manufacturer Warranty

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A.Y. McDonald 6127-383 Series 3/4 MNPT Potable Water Expansion Tank

2 - 5 Gallon, 3/4 in. MNPT

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Select Model & Quantity:

Model # Description Price Qty
6127-383 16002 V3MPIX, 2 Gallon, 3/4 in. MNPT $77.35
6127-385 16005 V3MPIX, 5 Gallon, 3/4 in. MNPT $100.10
6127-386 16005 V3MPI, 5 Gallon, 3/4 in. MNPT $83.20
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A.Y. McDonald - 6127-383 Series - 3/4"MNPT Potable Water Expansion Tank
In many of today's potable hot water heating systems, back flow preventers are required by code. Since this seals off the system, an expansion tank is required or the relief valve will discharge on every heating cycle. DuraMACTM Expansion Tanks eliminate this wasteful and costly practice.

The MPIX and MPI series has all the features of the MH series, but includes a powder coated liner in the water containing area. This unique bonded surface provides positive protection against rust and corrosion and meets today's sanitation requirements.

DuraMACTM Expansion Tanks must be installed on the cold water supply side of the water heater and placed between the water heater and check valve or back flow prevention device.
  • Drawn Steel Construction
  • Butyl Diaphragm
  • Maximum Working Pressure 150 PSI
  • 40 PSI Air Charge (field adjustable)