Saunders® Serial Weir design typically incorporates a common chamber shared by two weirs or operating points. The Tandem valve (Sterile Access Valve) is the most common design variation and is available in machined block or fabrication welded orientation to suit customer specification.

Saunders® range of standard machined block bodies incorporate Zero Deadleg T pattern and U Bend (Point of Use) body variations to provide high integrity branch or sample points from high purity water loops. The design optimises drainability , eliminates dead-leg or hold up volume and is available with additional back sample weirs to comply with customer specification.