Q."When installing the Davke 4000, do you need to coat the entire thing in the epoxy, or just the underside of the flange?" A. You only coat the underside of the flange where it touches the shower pan. The o-rings seal the base of the drain and allows it to flex a bit with the shower pan to avoid future breakage.
Q."I want to install the model 4000 in my basement shower, but it's too long. Will it still work?" A. Per the inventor, there are three o-ring grooves just for this reason. So long as the two included o-rings are both used in the installation, you can cut the drain down at the bottom o-ring groove and still have an excellent seal. Please note, once an item is altered, it is considered non-returnble. Always double check before cutting!
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