SureSite Dead Leg Dimensions

When configuring SureSites it’s important to keep note of the dead leg dimensions.  Dead leg dimensions are the top and bottom measurements past the point of the indication level.  They are needed to allow for the float to travel within the housing and still provide for optimal indication length.  These dimensions come into play on Side and Side (BA, BM, BP) connections, Top and Side (CA, CM, CP), and Side and Bottom (DA, DM, DP) type connections. 

When configuring any SureSite, whether it be a Mini, Standard, Plastic, or LED, it’s recommended to select a removable bottom connection.  One removeable connection must be selected on either the top or bottom so we can install the float.  We do have the ability to build units with no removable connection, which is referred to as a trapped float configuration, but this is rare and not recommended.  A bottom removable connection will provide easy access to install or remove the float for maintenance.  It also allows for the unit to be drained and cleaned routinely.

When configuring these with a bottom removable connection it’s not only important to leave enough room just for the dead leg dimension, but also to leave enough space to get the float in and out.  No sense designing in a removable connection if you can’t utilize it.  Most floats are approximately 6-8" long so take that into consideration when configuring your SureSite. 

The below image shows the top and bottom dead leg dimensions (X) for a Side and Side (BA, BM, BP) connection. 

The below image shows the bottom dead leg dimension (X) for a Top and Side (CA, CM, CP) connection. 

The below image shows the top dead leg dimension (X) for a Side and Bottom (DA, DM, DP) connection.

These dead leg dimensions will vary based on the type of connection chosen.  The specific gravity of the liquid is also a factor, but only for Standard Alloy SureSites.  The specific gravity of the liquid comes into play because it dictates the size of the float.  The lighter the liquid, the longer the float needs to be to provide enough displacement of liquid and proper buoyancy.  Thus, the longer the float, the greater the dead leg dimension.  Please review the dead leg dimensions webpages for your specific dimensions.