Bell & Gossett, a Xylem brand, released an updated version of its Glycol Make-up Unit GF60 (GMU), a pressurized solution designed for closed hydronic heating or cooling systems. The Bell & Gossett Glycol Make-up Unit GF60 (GMU) is an automated 110V diaphragm pump with digital control. Each engineered package is designed to maintain critical minimum pressure levels to make up for losses that may occur due to leakage. It comes with everything required for easy installation, the company says.