Rubber grommets and take-off adaptors form a branch connection from a compatible supply pipe to low density poly tubing. The grommet sits in the prepared opening and seals around the matching adaptor.
The grommet and adaptor must be selected as a compatible pair. The labelled product size is not the drilled-hole diameter; the required hole and suitable pipe wall depend on the selected components.
The adaptor passes through the grommet to form the take-off connection, with its outlet connected to matching branch tubing.