Geekpure 4 Stage Portable Reverse Osmosis Water Filtration System-100 GPD

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.

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.

I recently installed this water purification system, and it has exceeded all my expectations. After extensive research, I chose this system to address the quality of my well water, which contains significant sediment. To ensure the best results, I pre-filter my water at the pump using a series of sediment filters before it reaches the Geekpure purification system at my sink. The results are impressive. When I tested the purified water, it consistently showed 000 ppm, indicating absolutely no dissolved solids. The water is crystal clear, with no detectable flavors or odors. It's refreshing to finally have pure, clean water straight from the tap. The system is easy to install and maintain, and its performance has been consistently reliable. This purification system has significantly improved our water quality to the point I do not need to purchase gallons of purified water from the store, and I highly recommend it to anyone dealing with well water.

I do not recommend you purchase this. It is rigged together. It’s a piece of junk. When I opened it, it was like trying to solve a puzzle putting it together. It leaked the whole time so I sent it back. There are much higher quality RO units out on the market

Geekpure 4 Stage Portable Reverse Osmosis Water Filtration System-100 GPD This item is accurately described. I have observed its performance new out of the box as follows: Inlet feed water parameters: 50 psi, 274 ppm dissolved solids RO Filter outlet: 76 ppm dissolved solids, 267 ml/min delivery filtration speed Ion Exchange cartridge outlet: 0 ppm dissolved solids Waste water outlet: 519 ppm, 434 ml/min Volumetric efficiency: 38% Notes: The supplied feed water diverter side tap installation fitting is incompatible with US IPT pipe fittings. I deducted one star for this deficiency. It has straight threads and will leak no matter how you try to seal it. Find something suitable for your installation. I used a swamp cooler diverter fitting. The supplied ball valve is cheaply made but functional. The correct size Ion Exchange cartridges are available separately as replacements from several vendors. I expect this to be the first filter to be exhausted. I am monitoring the product water output with a dissolved solids meter to determine when replacement is needed. These meters are available inexpensively. Replacement RO cartridges are available. This unit uses the 100 GPD size and replacement will probably be needed when filtered water flow rate decreases noticeably compared to waste water flow rate, i.e. when the volumetric efficiency decreases too much. I am filling water jugs with the purified water, so I do not need a sink mounted faucet or pressure tank. I turn the supply water on and off with a ball valve.

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

First class. Best in price and performance. Not my first RO system, but the best I've owned. It takes my city water from 8+ pH to 6.0-6,2 with a TDS near ZERO and it makes over 20 gallons in just a few hours. Just have to supplement the minerals with "Replenish" and adjust the levels to your needs. Don't replace old spent $$ filters on your old RO System, step up and replace the whole system as a unit.

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.

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

Excellent RO unit, that is being used for Aquarium. 0ppm result, and generally takes around 50 mins for 10L. Unit has been very reliable so far. Excellent value for money.

Simple and easy installation. Very good results.

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

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