Pro Warm™ manifolds are made in Belgium by Pro Warm™, the market leaders in European Standard Pex-Al-HDPE pipe, manifolds & water underfloor heating systems. All our stainless steel mainfolds are made by Pro Warm™ to the highest quality standards. Manual valve for each port. Adjustable flow meter allows easy balancing. Factory pre-assembled on fixing brackets. Triple seal on pipe connections to eliminate leakage.