Pure4Sure 5-stage Under-Sink Reverse Osmosis system with Alkaliser.

Pure4Sure RO-5ALK Installation Instructions

Overview

The Pure4Sure Watermarked RO-5ALK is a 5-stage, high-efficiency Reverse Osmosis (RO) drinking water system designed to install neatly under your kitchen sink. The system delivers ultra-pure, mineral-balanced, alkaline drinking water directly to your chrome tap.

This guide provides step-by-step instructions for professional-quality installation and setup.

1. Components Checklist

Before beginning, ensure all components are included:

• 5-Stage Filter Assembly Unit (with pressure gauge pre-mounted)
• RO Membrane (sealed pack)
• Alkaline Filter Cartridge
• Steel Storage Tank (3.2 gal, pressurized)
• Chrome Faucet (European style)
• Feed Water Valve Adapter (½” or ⅜” fitting)
• Drain Saddle Clamp
• Leak Detector Kit
• Color-coded Tubing
• Red → Feed Water
• Blue → Pure Water Outlet
• Black → Waste Water (Drain)
• White → Tank Line
• Filter Housing Wrenches (1x filter, 1x membrane)
• Mounting Screws (if wall-mounting)

2. Tools Required

• Adjustable wrench or spanner
• Drill with ¼” (6 mm) bit (for faucet hole, if required)
• Phillips screwdriver
• Utility knife or tubing cutter
• Teflon tape
• Bucket or towel

3. Installation Steps

Step 1: Choose Installation Location

• Select a clean, flat surface under the kitchen sink.
• Ensure there’s enough space for:
• The main filter unit (≈ 43 cm H × 38 cm W × 15 cm D)
• The storage tank (may sit beside or behind the unit)
• Allow easy access for filter replacement.

Step 2: Install the Drinking Water Faucet

1. If your sink has a spare hole (e.g., for a soap dispenser), use it. Otherwise, drill a ¼” (6 mm) hole in a convenient location.
2. Place the faucet base, rubber washer, and decorative ring.
3. Insert faucet stem through the hole.
4. From below, tighten with the provided washer and nut.
5. Connect blue tubing to the faucet base (push-fit fitting).

Step 3: Connect the Feed Water Valve

1. Turn off the cold-water supply under the sink.
2. Disconnect the existing cold-water line from the stop valve.
3. Attach the feed-water adapter valve between the stop valve and the cold-water line.
4. Wrap threads with Teflon tape to ensure a tight seal.
5. Connect the red tubing from the adapter valve to the inlet port of the RO unit (marked “IN”).

Step 4: Connect the Drain Saddle

1. Select a spot on the sink drainpipe (preferably the vertical section above the P-trap).
2. Drill a ¼” hole through one wall of the pipe.
3. Align the drain saddle clamp so that its hole matches the drilled hole.
4. Secure both halves with the provided screws.
5. Insert the black tubing into the saddle’s quick-connect fitting.
   • This is the RO waste (reject) water line.

Step 5: Install the RO Membrane

1. Unscrew the membrane housing cap using the wrench.
2. Remove any packing material.
3. Insert the membrane into the housing — rubber O-ring end first into the cap side.
4. Push firmly until fully seated.
5. Replace and tighten the housing cap securely.

Step 6: Connect the Storage Tank

1. Wrap the tank outlet threads with Teflon tape.
2. Screw the tank ball valve onto the outlet.
3. Connect white tubing from the valve to the tank port on the RO unit (usually marked “TANK”).
4. Ensure valve handle is closed (perpendicular) during initial setup.

Step 7: Connect the Alkaline Filter

1. Identify the output line from the post-carbon filter.
2. Connect this to the inlet of the alkaline filter.
3. Connect the outlet of the alkaline filter to the blue tubing that leads to the faucet.
4. Use the flow direction arrows printed on the cartridge for guidance.

Step 8: Leak Detector Setup

1. Place the leak detector sensor pad under the RO unit.
2. Follow included instructions to connect the sensor cable to the system (battery-operated).
3. This will automatically stop the feed water in case of a leak.
4. Start-Up Procedure
   1. Turn on the feed water valve slowly to allow water into the system.
   2. Check all connections for leaks — tighten fittings as needed.
   3. Keep the faucet open for 5–10 minutes to allow air to purge.
   4. Close faucet and let system fill the tank (approx. 2–3 hours).
   5. Once full, drain the entire tank completely to flush any residual carbon fines.
   6. Refill tank — system is now ready for use.
5. System Monitoring
   • The pressure gauge should show between 40–100 PSI during operation.
   • If pressure is too low:
   • Check water supply.
   • Ensure membrane is not clogged.
   • If pressure is too high:
   • Verify the automatic shut-off valve is functioning correctly.

Step 8: Maintenance Schedule

Always use Pure4Sure genuine filters for optimal performance and warranty protection.

Step 9: Safety and Tips

• Do not connect to hot water (max 45 °C).
• Ensure incoming pressure stays within 40–100 PSI.
• Install on cold-water line only.
• Flush filters before first use and after long periods of non-use.
• Replace filters on schedule to prevent bacterial growth.
• For best taste and purity, drain and refill tank every few days if unused.

Step 10: Post-Installation Checks

• All tubing connections secure, no leaks.
• Faucet delivering clean, steady flow.
• Pressure gauge within range.
• Leak detector functional.
• Tank filling and shutting off automatically.