Description
The Zilmet ZEP12 is a durable, 4.8-gallon in-line thermal expansion tank designed to safeguard residential and light-commercial potable water and hot water heater systems from pressure surges caused by thermal expansion. Featuring a robust carbon-steel shell, a seamless diaphragm, and a ¾″ NPT stainless-steel connection, the ZEP12 helps maintain stable pressure and protects water heaters, plumbing, and valves against stress and damage.
Key Features
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Spacious 4.8 gal capacity — large enough to accommodate the expansion of water in typical residential water heaters or closed potable-water systems.
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150 PSI pressure rating / 210 °F max temperature — built for durability under typical hot-water system conditions.
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¾″ NPT stainless-steel connection — offers reliable, corrosion-resistant plumbing integration.
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Seamless diaphragm with polypropylene liner — ensures water stays separate from air charge, preventing internal corrosion and contamination.
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Factory-leak tested with MIG-welded shell — ensures consistent structural integrity and reliability.
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Durable epoxy-polyester exterior finish — enhances longevity and provides a clean, appliance-ready appearance.
