Dow TW30 100HR Rejection Replacement 1812 Review

Inexpensive, easy to install. No performance issues. Use this on my 6-state RO-DI system for my saltwater aquarium. A good membrane is the first step in building a reliable RO-DI system. Would definitely buy this again.

remove all filters see disinfect system with disinfectant. Flush the system twice with water. Replace the membrane and replace the filters. Flush the system twice and leave for 12 hours. the water is delicious.

I replaced the 50GPD RO membrane with a 100GPD membrane so the RO water was generated faster which increased the well pump has been interrupted. I have a Grundfos demand pump that delivers water according to intake. Every morning we use over a gallon of reverse osmosis water to brew coffee and fill water bottles. A 50 gal/d reverse osmosis membrane causes the well pump to cycle on and off every minute for about an hour. A 100 GPD membrane reduces the pump cycle to about 1/2 hour. Great water…

I only bought this a month ago and since then the TDS ppm meter has consistently climbed higher than my previous 50 gpd membrane which I've been using it for 5 years now. and the TDS ppm of the old membrane at 150 seconds was lower than that of this membrane which is 200 ppm. I then changed all the other filters as well, hoping that the PPM (tap water in the city is around 300ppm) would drop significantly, but NOT quite. I thought some reviews rated it high and it's made in the USA not China so

I replaced a 50GPD RO membrane with a 100GPD membrane to produce RO water faster and give my well pump a break. I have a Grundfos demand pump that delivers water according to intake. Every morning we use over a gallon of reverse osmosis water to brew coffee and fill water bottles. A 50 gal/d reverse osmosis membrane causes the well pump to cycle on and off every minute for about an hour. A 100 GPD membrane reduces the pump cycle to about 1/2 hour. Great water and quick recovery. (Requires new…

I am very disappointed with this diaphragm. It has a lower bounce rate than the one I replaced it with. I've been taking readings for more than 2 months and they haven't improved even after the membrane was fully saturated. Dry membranes take time to fully hydrate. I'm a former RO industry leader and have used a very accurate TDS meter. I have monitored the water quality, it has improved by no more than 91%. I'm not sure if this high scrap rate membrane is a Dow/Filtec manufacturing issue or a…

I only bought this a month ago and since then the TDS ppm has kept going higher than my previous 50 gpd membrane which I've been using for 5 years and the TDS of the old 150 membrane was lower than this membrane which is 200ppm. I then changed all the other filters as well, hoping that the PPM (tap water in the city is around 300 ppm) would drop significantly, but NOT quite. I thought some reviews rated it highly and it's made in the USA not China so I bought it. However, he was very…