Coliter ® Air Vent Assembly, PN16, 100°C, Lead-Free Brass, for Manifold Systems
FSQ901 Air Vent Assembly – Integrated End-Piece with Automatic Air Vent, Drain Valve, and End Tee for Hydronic Manifold Systems
The Coliter® FSQ901 Air Vent Assembly is a multifunctional end-piece designed for underfloor heating and hydronic manifold systems. It integrates three essential components into a single compact unit: an automatic air vent to continuously release trapped air at the circuit’s highest point, a drain valve for system maintenance, pressure testing, or winterization, and an end tee connection for secure termination of the manifold header. Constructed from lead-free brass, it ensures corrosion resistance and long-term reliability. Rated for a maximum working pressure of PN16 (1.6 MPa) and temperatures up to 100°C, it is available in standard sizes DN25 (G1") and DN32 (G1¼"). Compatible with Coliter® and other standard manifold systems, the FSQ901 delivers enhanced system stability, simplified servicing, and effective protection against airlocks and sediment accumulation.
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Introduction to End Piece
Coliter®’s end piece assemblies are essential safety components for underfloor heating and hydronic manifold systems, integrating an automatic air vent, drain valve, and end tee into a single compact unit. The assembly automatically releases trapped air at the highest point of the circuit while enabling quick drainage for maintenance, pressure testing, or winterization. Available in DN25 (G1") and DN32 (G1¼") sizes with lead-free brass construction, it ensures reliable operation up to PN16 (1.6 MPa) and 100°C. Compatible with standard manifold headers—delivering system stability, easy servicing, and long-term protection against airlocks and sediment buildup.
