Product review (4 stars): I wish it had a side drain
This is the heaviest duty plastic drain pan we could find - and we have one installed under both our stackable washer/dryer and our water heater.

Overall, it's a high quality pan - but the pictures aren't high enough resolution to make it clear that both the drain snap-outs are on the bottom of the pan instead of the side (which is what I needed in our attic).

As a result, I drilled my own 1 1/4" hole in the side; and the pan is barely tall enough to make that work without creating a potential leak.

We did drop a water leak detector&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Found-Here/dp/B01J39MJF2/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">(Found Here)</a>&nbsp;in the pan to alert us just in case this pan starts to fill with water.  (A water heater in the attic has always made me nervous...)

Overall, I would recommend this for people who either don't want/need a drain, or need a drain port on the bottom of the pan.  If you need a side drain, just be aware that you're going to be making some modifications.