TDS Meter - Tester. The Only Way To Know If Your Reverse Osmosis RO Membrane Is Performing Correctly - Tests for TDS - Total Dissolved Solids. A Must For All RO System Owners. Compare Incoming Feed Water To Treated Water - Replace Membrane If Less Than 80% of TDS Is Being Removed

TDS Water Meter - HM Digital DM1 - Dual Mode - Installs Inline - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Dual Range 0-9990 ppm. Always know if your RO membrane is performing correctly!

Hydrotech (Aqua Flo) ® 4VTFC75G Reverse Osmosis Drinking Water System RO. 75 Gallon Per Day GPD. TFC Thin Film Composite membrane, sediment pre filter, carbon pre filter, carbon post filter, auto shut off valve, California Prop. 65 lead safe 3/8" flow air gap faucet, and your choice of metal or polypropylene tank. System is 15" wide X 15" high X 3" deep. Plastic tank is 20" high X 8" diameter. Metal tank is 15" high X 11" diameter. # 12302003.

Amtrol ® RO 4 RO Replacement Tank for Reverse Osmosis Water Systems. 4.4 Gallon (15" high X 11" diameter - including base) SS Stainless Steel Connection Stem - Connection Size: 1/4" MNPT - Valve Optional

Dow Corning/ Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?

Hydrotech ® 33001056 75 GPD RO TFC Reverse Osmosis Membrane - Yellow body black or blue band.

Hydrotech ® E-VW-01 Filter Housing Spanner Wrench for Old Style 1230 HT-HTF Series Reverse Osmosis RO Systems. Also for the Aquifier series systems. For housing removal only. # 21401003. DOES NOT FIT NEW STYLE 1240 SYSTEMS.

Hydrotech ® S-FS-19 & Aquafier Carbon Block Water Filter. CTO 10 Micron (Blue End Caps) # 41400009 For HT & HTF Series Reverse Osmosis RO Systems. a.k.a. #41400075

Hydrotech ® HT-HTF & Aquafier Replacement Water Filter Housing Sump. # C-HT-19 # 20500023 For HT-HTF and Aquafier Series Reverse Osmosis RO Systems.

Hydrotech ® 34201026 & Aquafier O-ring for filter housing. Fits Hydrotech, Aquafier and Hydrofiner systems. 2 1/2" diameter

Hydrotech Shut Off Assembly Inlet Cover O-ring #34201024