Coliter ® Adjustable Bypass Valve, PN16, 100°C, Lead-Free Brass, for Manifold Systems
FSQ9007.32 Adjustable Bypass Valve – Precision Flow Control for Hydronic Manifold Systems
The Coliter® FSQ9007.32 Adjustable Bypass Valve is a specialized brass valve designed for hydronic underfloor heating and radiator manifold systems, enabling precise balancing of flow between supply and return lines. By allowing a controlled portion of hot water to bypass the heating circuits, it stabilizes system pressure, prevents overheating, and ensures even heat distribution across all loops. Constructed from lead-free brass, it features a finely threaded adjustment screw for smooth, accurate flow regulation. Rated for a maximum working pressure of PN16 (1.6 MPa) and temperatures up to 100°C, it is compatible with standard manifold headers and commonly used in conjunction with end-piece assemblies such as the FSQ901 or 267009.0110. Ideal for residential and commercial radiant heating installations requiring hydraulic stability and energy-efficient operation.
Installation diagram
Product Description
Product Inquiry
We will contact you within one working day. Please pay attention to your email.
Faq - Frequent questions
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.
