Acorn DorWAL rollers - single vs double
A quick learner from Warwick says:
May 31, 2016
Tom from SWISCO responded:
June 3, 2016
It may be possible, but there are two important dimensions that differ that may prevent the 81-030 from working: the height of the housing and the width of the housing. The height and width of the 81-030 housing is 1-1/8" and 3/4", respectively, while the same measurements for the 81-027 are 1" and 19/32". There is no guarantee. Honestly, we always recommend sticking with what was installed originally just to play it safe.