Alphi-11 Propylene Glycol (5 Gal) 320273-354 The ZSR103 is a multi-zone

The ZSR103 is a multi-zone pump and boiler operating control for multiple zone hydronic heating or cooling systems

Gaskets must be in proper position or flue gases could leak resulting in carbon monoxide poisoning

Secure Settings: Multi-level keypad lockout for installer and user settings

Spot irrigation for gardens

Alphi-11 Propylene Glycol (5 Gal) 320273-354 The ZSR103 is a multi-zoneFernox Antifreeze Protector Alphi 11 is a combined glycol antifreeze and inhibitor. Offering long term protection against frost, internal corrosion and limescale in heating and chilled water systems, including geothermal systems. Compatible with all metals and materials commonly used in hydronic systems including aluminum, Antifreeze Protector Alphi 11, is proven to work efficiently and has been tried and tested on installations worldwide and NSF CIAS