GE Zoneline PM77X001 WATER EXP TANK 2.1 GALLON

The expansion tank provides a space for this extra water volume, preventing damage to the system, reducing pressure on plumbing lines, and helping to maintain consistent water pressure throughout a property.

• Prevent damage to the plumbing system and water heater.
• Reduce pressure on plumbing lines and maintain consistent water pressure.
• Enhance system performance, longevity, and overall energy efficiency. 

The tank uses compressed air and a butyl rubber diaphragm to accept and expel the changing volume of water as it heats and cools

The GE PM77X001 is a 2.1-gallon hot water heater expansion tank designed to manage excess pressure in residential plumbing systems.

This expansion tank is a crucial component for closed water systems (those with a backflow preventer or pressure-reducing valve) to absorb the excess water volume created during the heating process.

 

Attribute	Detail
Brand	GE Appliances
Product Type	Water Heater Expansion Tank
Model Number	PM77X001
Capacity	2.1 gallons (8 liters)
Connection Size	3/4-inch male pipe thread (MNPT)
Factory Pre-charged Pressure	40 PSI (adjustable up to 80 PSI)
Maximum Working Pressure	80 PSI (some sources indicate 150 PSI)
Maximum Operating Temperature	200°F
Dimensions (H x L x W)	13.39 in x 8.46 in x 8.46 in
Weight	5.31 lbs
Safety Certification	UPC certified
Application	Residential potable water systems