I think you might be misunderstanding what Tangible means by the term "sacramental theology". Baptizing infants is done in many churches which have nothing to do with sacramental theology. Zwinglian theoloogy is quite pervasive in many churches which do baptize infants and practice communion. The difference is that in sacramental theology there is distinct belief in the value of the sacrament in imparting grace to the recipient. Lutherans view the sacraments as "means of grace" although they would be quick to deny that the sacraments, in and of themselves, impart grace. Tangible can expand on this idea, if he wishes. The Zwinglian view of communion is that it is a memorial (remembrance) commanded by Christ in which the bread and the cup remind the believer on His sacrifice on Calvary, but do not serve as a "means of grace." Likewise, the baptism of infants is seen as being either a type of dedication of the baby to God or as a recognition by the congregation of its responsibilities in helping to raise the child in a Christian church. In England, there is also a strong view that infant baptism is the means of christening (naming) the child with its proper Christian name.
In my interaction with the E Free churches (which has not been too extensive, I will admit) I have not detected a sacramental understanding of either baptism or communion.
On a side note, my brother belongs to an Evangelical Covenant church which does not baptize infants, even though the denomination does, as a whole. The congregations in the Evangelical Covenant denomination seem to have a greater level of autonomy than those in the E Free denomination.