The Wirsbo SSC fittings and the Wirsbo Propex Fittings both accomplish the same thing. They make connections using pex fittings and pex tubing. The SSC Fittings are clamp style fittings and require the SSC Tool and SSC Clamps. When using the Propex fittings the tubing is expanded using an expander tool. Propex rings are needed to secure the connections.
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