928-043

This 4.5 Gallon Potable Water Expansion Tank is a critical safety component designed to manage thermal expansion in domestic water heating systems. When water is heated within a closed plumbing circuit, its volume increases, creating potentially damaging pressure spikes. This expansion tank provides a dedicated space for that excess water to go, protecting your water heater, pipes, and fixtures from stress and preventing the constant tripping of the pressure relief valve. Engineered specifically for potable (drinking) water applications, it features a high-quality internal diaphragm to keep the water separate from the air chamber, ensuring a long-lasting and maintenance-free solution for residential and light commercial plumbing systems.
Type: Boiler Parts and Plumbing Accessories
Size: 4.5 Gallon
Dimensions: 11 inches × 11 inches × 15 inches
Application: Used in closed-loop potable water heating systems, including residential water heaters and boiler-fed domestic hot water setups, to prevent over-pressurization.
Specifications: Lead-free construction, butyl rubber diaphragm, stainless steel connection port, and a durable carbon steel outer shell with a corrosion-resistant finish.