Description
The Zilmet ZHT18-30 is a 4.8-gallon pre-pressurized diaphragm expansion tank engineered for closed-loop hydronic heating systems. Designed to absorb the pressure fluctuations caused by thermal expansion of water in the system, this tank helps protect boilers, pumps, and piping from damaging overpressure conditions — extending the life of your entire hydronic system.
Key Features
- 4.8-gallon total volume for effective pressure management in residential and light commercial hydronic systems
- 1/2″ NPT connection for straightforward installation into standard hydronic piping
- Pre-pressurized diaphragm design separates system water from the air charge, preventing waterlogging
- Heavy-duty steel shell construction for long-lasting durability
- Replaceable air valve allows field adjustment of pre-charge pressure
- Butyl rubber diaphragm is compatible with potable and non-potable heating system fluids
- Compact footprint suitable for tight mechanical room installations
Applications
- Residential and light commercial hydronic heating systems
- Closed-loop boiler systems
- Radiant floor heating systems
- Fan coil and baseboard heating systems
Why Choose Zilmet
Zilmet is a globally recognized manufacturer of expansion tanks and pressure vessels, known for precision engineering and consistent quality. The ZHT series is purpose-built for hydronic heating applications, offering reliable performance and easy installation that HVAC professionals trust.
Product Specifications
- Model: ZHT18-30
- Total Volume: 4.8 Gallons
- Connection Size: 1/2″ NPT
- Tank Type: Pre-pressurized diaphragm
- Application: Hydronic heating (closed-loop)
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