Description
The Flexcon HTX-90 is a 15-gallon hydronioc expansion tank designed to absorb excess water and volume changes in closed-loop forced hot water (boiler) heating systrems.
- Total Volume: 15 gallons
- Acceptance Volume: 6 gallons
- Maximum Pressure: 100 psi
- Factory Pre-charge: 12 psi (adjustable)
- Maximum Temperature: 220°F
- Dimensions: 16 inches in diameter by 20.8 inches in height
- Connection: 3/4-inch MNPT
- Materials: Cold-rolled steel shell with an appliance-quality paint finish and a butyl rubber diaphragm
- Brass air valve with O-ring seal
- Closed-Loop Heating Only: This tank is meant exclusively for hydronic (hot water) heating systems. It is not rated or safe for potable (domestic drinking) water systems.
- Diaphragm Design: It features an oversized butyl rubber diaphragm designed to minimize stretching and wear, which helps extend the operating life of the tank.
- Pre-Charge Check: You should always check and match the tank's air pre-charge pressure to your system's cold fill pressure during installation.


