Can I Retrofit Whole Home Reverse Osmosis To My Home?
Yes! Whole home reverse osmosis systems are often added to an already-built home. There are a few considerations in the retrofit:
First is the space. Many whole home reverse osmosis systems are comprised of the main RO which is usually a rack-mount device that will occupy a 30" x 30" footprint (at least) and four or five feet of height. Most systems also include pre-filtration that needs another 24" x 24" of floor space and then four or five feet of height. The storage tank requires space of it's own too. There are multiple different dimensions for storage tanks, just make sure you select one that will fit through you door, and in your basement. Lastly, the RO membrane will require vertical clearance as it will need to be removed and replaced periodically. Membranes are usually 48" long.
You will need proximity to an electrical source. Whole home reverse osmosis sysems use electricity to power both the booster pump, and the repressurization pump.
Raw water feed. You'll have to position the system so that you can easily feed your raw, untreated water to it.
Drain. Most whole home reverse osmosis systems will send significant amounts of water to drain. You'll need to know in advance where you want this waste water to go. In temperate climates it's important that the drain line isn't routed anywhere that it could freeze. If sending the waste stream to your septic system make sure you consult with the designer of the system to make sure the added volume won't negatively affect your septic performance. Systems like this send very little water to waste and may be better suited to some installations.