The Premier Reverse Osmosis system is designed for under-sink installation and must be connected to a cold-water supply line. For full step-by-step instructions, refer to your owner’s manual.
If you are unfamiliar with plumbing connections or local plumbing codes, we recommend consulting a licensed plumber who is familiar with your home’s structure and regional requirements.
Professional Installation Recommendation
Professional installation is recommended if:
- You are unfamiliar with under-sink plumbing connections
- Your setup requires modifying existing plumbing or drain lines
- You are unsure how to properly install the drain saddle or feed water connection
- You want to ensure compliance with local plumbing codes
A licensed plumber can help ensure proper installation and long-term system reliability.
Pre-Installation Prep: Required Conditions
Before installing the system, confirm the following:
- Incoming cold-water pressure is between 40–75 PSI
- The system will be connected to a cold-water supply line only
- There is adequate space under the sink for both the RO unit and storage tank
- A proper drain connection point is available for the drain line
- All components and tubing are accounted for and undamaged
These conditions are required to ensure proper system performance and safe operation.
The Importance of Operating Pressure Requirements
Water pressure is important for under-sink RO systems because the system depends on pressure to push water through the reverse osmosis membrane.
If pressure is too low, water may not move through the membrane efficiently. That can lead to:
- Slower purified water production
- A storage tank that takes much longer to fill
- Weak flow from the RO faucet
- Lower system efficiency
- Reduced water quality or quantity
If pressure is too high, it can strain the system. That can lead to:
- Leaks at tubing or fittings
- Damage to internal components
- Premature membrane wear
- System malfunction
For the Premier RO system, the required incoming water pressure range is 40–75 PSI. Staying within that range helps the system produce filtered water properly, protect the membrane, and avoid unnecessary installation or performance issues.
Premier Series Parts
Below is a list of the main components included in the Premier Series RO system.
Water Line Connections
Before installation, identify the main tubing connections used by the Premier Series RO system.
- Feed Line: Connects from the cold-water angle stop (under the main faucet) to the inlet of the RO system.
- Tank Line: Runs from the tee connection after the membrane to the storage tank.
- Drain Line: Typically the black tubing. It connects from the membrane drain port to the drain saddle installed on the sink drain pipe.
Ensure all tubing is fully inserted into fittings and secured before pressurizing the system.
The Storage Tank
The storage tank holds purified drinking water until it is dispensed from the faucet.
Inside the tank, a sealed internal bladder stores treated water, while compressed air helps push water out when the faucet is opened.
Before operation, confirm the tank pressure is between 5–7 PSI when the tank is empty.
Flow Restrictor
The drain line includes a flow restrictor that helps control water flow through the RO membrane.
This restriction creates the pressure needed for the membrane to separate purified water from rejected water. Without the flow restrictor, the system will not produce purified water correctly.
Basic Installation Overview
Installation involves the following steps:
- Connect the feed line from the cold-water angle stop to the RO system inlet.
- Install the storage tank and connect the tank line.
- Install the drain saddle and connect the drain line.
- Install and connect the dedicated RO faucet.
- Ensure all tubing is fully inserted and secured into fittings
- Pressurize the system slowly and check for leaks
The system must be installed with proper tubing connections and secure fittings to function correctly. For a full overview of installation steps, refer to the user manual.
After Installation: Initial Flushing Procedure
After installation:
- Allow the storage tank to fill completely.
- Open the RO faucet and drain the tank fully.
- Allow the tank to refill again and repeat the entire process 2-3 times.
During initial use and after filter replacement, water may appear slightly gray due to carbon settling inside the filters. This is normal and will clear after 1–2 flush cycles.
Common Installation Questions
It’s normal to have a few questions during installation. Below are some of the most common ones to help guide you.
Can I connect the reverse osmosis system to hot water?
The Premier Reverse Osmosis system must be connected to a cold-water supply only. Connecting to hot water can damage internal components and reduce system performance.
Where can the reverse osmosis system be installed?
The system is most commonly installed underneath the kitchen sink. For alternative installation setups, consult a plumber to ensure the system operates properly and meets plumbing requirements.
- RO Base Unit: 14” (L) x 5” (W) x 15” (H)
- Storage Tank: 12” (L) x 12” (W) x 15” (H)
Wherever the system is installed, always ensure adequate clearance under the sink for both the filtration unit and the tank before installation.
Can the system be connected to a refrigerator or ice maker?
Yes, the system can be connected to a refrigerator or ice maker. For balanced output and easier installation, an Extra Output Kit is recommended.