Beginner’s Guide To Greywater Sump Pump Sump pumps are used when you need to get the greywater uphill or across the landscape.We create the complete sump pump distribution unit out of one sump pump holder.Watch our tutorials videos for building instructions. You Might Also Like Beginner’s Guide To Greywater 3 Way Valves Part 1 April 26, 2020 Beginner’s Guide To DIY Greywater Check Valves April 26, 2020 Beginner’s Guide To The Aquifer Coupler April 26, 2020