GR/O Retro Fit Kit

The GR/O Retro Fit Kit is the perfect way to upgrade an older reverse osmosis system without purchasing a whole new unit. Specifically designed for users who have a good working RO tank and working RO faucet to upgrade to a modern, sleek look, this system is great for all the three housing and your choice of tubing and connecting couplets to deliver pure, bottle-quality water to your faucet, refrigerator or other water dispenser.

If your faucet and tank are still in excellent condition but don't seem to filter like they should, the GR/O Retro Fit Kit allows you to "turn your old units into new", easily, at a fraction of the cost of a new system. Fits 75 GPD standard reverse osmosis membranes and filters, this 4-stage replacement head assembly provides the same level of filtration without having to replace parts that are still working perfectly.

Cost-Efficient Upgrade Without Waste

No Need to Change the Whole System

A lot of reverse osmosis systems have tanks and metal faucets that are built to last beyond their plastic filter housings. The GR/O Retro Fit Kit allows you to retrofit only what you need, saving you money and eliminating unnecessary waste.

Smart Sustainability

By recycling your existing tank and faucet:

• You reduce material waste
• You're getting extra life out of good parts
• You’ll reduce the cost and time required to install.

This replacement retrofit option delivers outstanding performance and environmental benefits all in one easy package.

Four-Stage Filtration Design Compatibility

4 Stage Retorfit Head Assembly this retrofit head assembly is used for a 4 stage RO system typically consisting of:

• Sediment pre filter: Prevents clogging of the RO membrane and extends its life
• Carbon block: Pre-filter reduces chlorine taste and odors
• 75 GPD RO membrane: Eliminates impurities, fluoride, and heavy metals
• Post carbon polishing filter: stock up to ensure you have a replacement on hand to maintain optimum taste quality and overall water quality.

The GR/O head fits industry standard 10” cartridges and membranes often used on under-sink RO systems.

Simple Installation and Design Highlights

Fully Assembled 3-Housing Filter Head

The retrofit kit comes with:

• Pre-mounted 3-stage filter head
• Three standard 10" housings
• Fittings ready to connect

You’ll merely connect it to your tank, faucet, and water lines, provided you have the above.

Quick and Clean Replacement

No need to dismantle plumbing lines or untie the tank and faucet:

• Just remove the old filter head
• Install the new replacement GR/O assembly
• Insert your cartridges
• Reconnect tubing using push-to-connect fittings

Any qualified or very confident DIY installer would normally fit a standard Basin and pedestal in under 30 minutes.

Part Number and Model Details

Model: GR/O-HE-75-RK

Description: 4 Stage 75GPD Head with 3 Housings

Included: RO filter head assembly (Only)

Not included: Tank, faucet, tubing, filters, or installation kit

Weight: Approx. 6–7 lbs (assembled)

Pricing comes in graduated bulk, so this is perfect for service providers or replacing multiple units.

Final Words

The GR/O Retro Fit Kit is a convenient and economical way to keep your reverse osmosis (RO) system operating at maximum efficiency. Rather than replacing your whole configuration, conveniently replace your old filter assembly with this 3-housing head that’s ready to use, and your unit will work as good as new. Perfect for the homeowner or water professional, this kit makes upgrades a snap while saving money and preventing thousands of plastic containers from ending up in landfills and in our oceans and environment.