Square downpipe

Position the square downpipe outlet vertically over the drain pipe (Fig. 1).
Mount retaining brackets in a straight line. At least 2 retaining clamps must be mounted for each individual pipe run. The distance between the retaining clamps must not be more than 2 m (Fig. 2). (Observe national regulations and guidelines. Due to the length of the PREFA square tubes of 3 m, a maximum distance of 2 m has proven to be practical.)
Observe a distance of at least 45 mm between the wall and the square downpipe (Fig. 3).
Insert the square downpipe socket all the way down into the sewer pipe and mount square downpipe. Then push the square downpipe socket upwards and fix it to the PREFA square downpipe (Fig. 4).
Always shorten the square downpipe on the side WITHOUT an indentation (Fig. 5). If the indentation (tapering) is cut off, it is no longer possible to connect the pipes by plugging them into each other.
When installing in a wall recess or slot, tighten the retaining clamps from above.

Note

The square downpipe is available in many different lengths. Make sure you have the right length when ordering to enable waste-optimised work.