I'm remodeling a home in rural KS and replaced all the appliances and the existing water softener went on the fritz. The well known national company that made it wanted $2000 to replace it with a new one! So I found a highly rated softener, a triple water filter and this UV sanitizer for less and installed it myself. The UV sanitizer was a breeze to install. I mounted mine vertically to save space and I would recommend that if you do so also mount a 1 inch support to hold the weight of the stainless steel tube below it as the plastic clips that hold the unit could be a little tighter for a vertical installation. I also had to countersink the plastic clips mounting holes to allow the screw heads to be flush with the inside bottom of the clips so the tube would fit snugly. I would recommend that you use at least 10 wrappings of teflon tape on the inlet/outlet threads and assemble the 2 PVC adapters BEFORE mounting to get them really tight to not leak. For good measure I also used this tape around the glass tube inlet fitting to also keep from leaking. There is an install video for the glass tube install on YouTube but be sure to wear rubber gloves when installing the glass tube to keep any contaminates off of the glass tube and only hand tighten this fitting. After plumbing the fixture and mounting to the wall I would also recommend removing the bulb just far enough out of the cardboard tube to grasp the white part and plug it into the socket before installing to align the pins as the pins are not a perfect square they, are a rectangle. Be sure to wear gloves to handle the bulb also. That's it! Really easy install. I bought this one from Geekpure because of the 3 bulbs and 3 glass tubes that come with it which is more than anyone else offered and they can be very expensive to replace, but I only received 2 of each. I contacted Geekpure and they sent out 2 more of each that very same day even though I was only missing one! Great customer service. There is a Disinfection Procedure in the instructions that calls for running bleach (chlorine) through out all your plumbing in the house to sterilize the lines until you "smell" the chlorine. I can't smell things very well and I have a hot tub so I used the water test strips (search on 1530100020 for $10/100 test strips) to be sure when there was plenty of chlorine coming out of all the lines and also later to test when flushing all the chlorine out of the lines and test the condition of the water. I was sure to flush all the toilets, run the dishwasher and the clothes washer (both empty) during this procedure. This will also help sanitize all the drains as well. If you have a filter, water dispenser and ice maker in your refrigerator I would recommend NOT use it during this procedure until your sure the lines have been thoroughly flushed out. If you think there maybe germs in this line remove the filter, disinfect and replace a NEW filter when done and throw away the first full tub of ice made. My family has had many bad experiences with "tap" water in the past and adding this "whole house" UV sterelizer that virtually eliminates all germs to my system now gives me piece of mind and for this small price with the extra bulbs and glass tubes it was a real no brainer, only wish I had done it many years ago! Hope this helps and may you NEVER buy bottled water again!! (such a waste of time, money and trash!)