Low water pressure of less than 45 psi at the tap (45psi and lower) can potentially decrease your water flow of reverse osmosis water. Cold water temps can also drastically decrease your flow rates.
Although hydrologic already offers an ideal booster pump for your Stealth reverse osmosis machine, which will increase psi to improve the effects of low temps and pressure, they also offer a different choice by providing you with this special membrane. Do not run hot or warm water directly from your water heater through your RO unit as this is not a practical way to increase water temps. Now, with the aid of the new membrane you can improve flow rates better than with just a standard Stealth membrane.