Geekpure 4 Stage Portable Aquarium Reverse Osmosis RO Drinking Water Filtration System 100 GPD - with DI Filter TDS Close to 0 ppm

Easy to install, works perfect. Drain/clear water 50/50 so good for this cost, minimal leak and it was for the adapters (99.99% solved using Teflon), in about 9h 38 gal of clear water delivered, so it’s a real 100 GPD system.

You cant beat the vaule, works great! Instead of buying r/o water and dealing with carrying 5 gallon cans, just make at home. Great for small usage

I love these filters. Great value for money and with a sink faucet adapter I use it to make my own reverse osmosis water. If you only use it for drinking they last for years without needing replacement according to my TDS meter. Just put it in your sink in the bathroom when filtering water so there are no spills and put the dirty water in the sink as well. Then I put the water jug in the shower/bathtub so that if I forget and it overflows in doesn't spill water. See how long it takes for the jug to fill with clean water and set an alarm. This is the most portable and easy installation and takes like 15 seconds to start to fill water and put the filter away after.

DO NOT BUY THIS PRODUCT USED. I received a system that had been previously used and returned filled with water in the original box. The box was filled with parts out of bags along with garbage such as cut zip ties. The box and instructions were damaged by water. The hose cutter was missing. The product received was greatly degraded and the lower price for a used product did not compensate.

works great, includes 3 different ways to hook it into your water line

Jan 20th 2026, I am ordering my 3rd unit for my master bath room. Oldest unit is 4 years old and works great, cheaper than buying the filters! CONTRARY to other reviews this unit is very fast but you may need a pressure tank. Excellent product! Great ro unit, flow rate and recovery higher than more expensive systems, works better with a tank. I have 2 units now! One in my home and one in my rv. Needs on/off control as it runs all the time without shutoff. I used a 13 volt solenoid in rv and pressure regulator in home.

Does the job well but very very slowly. Otherwise I’m happy with it

Holiday sale had these marked cheaper than replacing the filters so I ordered a few. This is a very basic system to give you a slow flow of RO/DI water. You need a valve at the Inlet to shut it off when you are not drawing RO/DI water. Adding a float to the outlet will help prevent spillage, but will not close the drain/waste water outlet, you will also need the 4 port auto drain shut-off if you want such features or to add a faucet. Great value when you don't need all the extra features, even better with the discount I received, still pretty good if you also want to add separate upgrades, as the all inclusive kits easily cost double but only add a faucet, storage tank and auto drain shut-off. Some customers need to store much more water for selling brewed beverages, making included 2 gallon tanks surplus inventory and wasted money. FYI don't drink plain Deionized water, with replace the Deionize filter with a inline polishing filter (carbon) for low TDS drinking/cooking water, make sure to get adequate minerals from your diet or add a mineralizing stage (such as alkaline) *designed for drinking water* as the final stage with or without the Deionize stage. I am a big time believer that our hard local tap water gives kidney stones so I opt for low TDS water and spring water. Grew up plumbing, i can taste and smell chlorine and limestone in tap water, seen limestone, fluoride and calcium in toilets, water heaters, dishwashers, sinks, showers/tubs, casted over long neglected leaks... Some people say low TDS water is unhealthy, you can't convince me my tap water is healthy, MAYBE safe, but not healthy. The extra 530 PPM of nasty stuff I filter out scares me way less than the low 20ppm reading of my RO "thirsty water" (but not deionized water, 0 PPM is indeed too low for drinking water)

Hola soy de la ciudad de México , mi experiencia con este filtro de ósmosis es la siguiente: El primer día instale el filtro según el manual , pero me generó un garrafón de agua de 20 litros con TDS en 0 en 22 hrs , instale una bomba ( en México se les llama presurizador ) y funciona mucho mejor , logré generar 20 litros con TDS en 0 en 2:30 hrs . Conclusión: funciona tal y como se menciona en la descripción, pero si tienes que tener instalado una bomba de presurizacion para su correcto funcionamiento

Simple and easy installation. Very good results.

Installation un peu laborieuse, mode d’emploi très sommaire. Résultat apparemment concluant.

Highly recommend this. Took my tap water PPM down to 0. Fantastic. Very clean pure water, better than store bought.

Tap water was around 250 ppm after filtration it is decreased 0 ppm.