iSpring Filter Review – My Full Review of the System

When it comes to drinking water quality, few systems offer the precision and reliability of the iSpring RCC7AK 6-Stage Reverse Osmosis System. This 6-stage reverse osmosis system is one of the most trusted units available to UK households, delivering clean, mineral-balanced water straight from your tap. In this iSpring filter review, we’ll cover everything you need to know – from installation and performance to taste, maintenance, and whether it’s worth the investment

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What is the iSpring Filter System?

The iSpring RCC7AK is an under-sink reverse osmosis water filtration system that uses six distinct stages to purify your tap water. Beyond removing over 1,000 contaminants – including lead, chlorine, fluoride, arsenic, and nitrates – it includes an alkaline remineralisation filter that adds back beneficial minerals like calcium and magnesium.

This final stage not only improves flavour but also neutralises acidity, giving you better-tasting and healthier water every time you turn on the tap.

It’s NSF/ANSI certified, making it a safe and high-performing option for households that want full-scale home drinking water filtration without the recurring costs of bottled water or countertop dispensers.

It is one of the best water filter systems on the market. So, let’s dive into my full Spring Filter review and uncover why 🙂

Installation & Setup

First up in this iSpring Filter Review, let’s talk about its installation and setup. While installation is more involved than simpler inline filters, it’s still doable for confident DIYers. You’ll receive everything you need in the kit:

• Pre-filters and RO membrane
• Alkaline remineralisation cartridge
• Brushed nickel faucet for purified water
• Storage tank (3.2 gallons)
• Colour-coded tubing and connectors

If your sink has an existing unused hole (e.g. for a soap dispenser), adding the faucet is straightforward. Otherwise, you may need to drill a hole or hire a professional. The system fits well under standard UK sinks, though it does take up more space than compact models like Waterdrop.

Filtration Performance

The iSpring RCC7AK system’s multi-stage setup ensures layered protection and refinement:

1. Sediment Filter – Removes dirt, rust, and large particles
2. Granular Activated Carbon (GAC) – Targets chlorine and chemical residues
3. Carbon Block Filter (CTO) – Tackles VOCs and improves taste
4. RO Membrane – Filters contaminants down to 0.0001 microns
5. Post Carbon Filter – Polishes water before storage
6. Alkaline Filter – Restores minerals and raises pH levels

This comprehensive filtration helps produce water that’s clean, crisp, and balanced – ideal for cooking, brewing, and hydration.

Taste & Quality Review

Standard RO systems often remove beneficial minerals along with contaminants, resulting in slightly acidic water. The iSpring RCC7AK solves this by adding back essential minerals during the final stage, restoring both flavour and health benefits. Users frequently report smoother texture, more refreshing taste, and better results when making tea, coffee, and soups.

Filter Replacement & Maintenance

Filter changes are simple and follow this schedule:

• Pre-filters: Replace every 6–12 months
• RO membrane: Every 2–3 years
• Post carbon & alkaline filters: Every 12 months

Transparent housing on the sediment filter helps monitor when replacements are needed. Replacement kits are widely available on Amazon UK and typically cost around £70–£90 annually.

My Personal Experience

After testing the iSpring RCC7AK, I noticed a dramatic difference in water clarity and taste – no chlorine sharpness and none of that slightly metallic aftertaste you sometimes get from the tap.

The installation process was manageable, though I did need to drill a hole for the faucet. Once installed, the system ran quietly and filled the tank quickly, providing purified water on demand.

For me, it’s been a worthwhile upgrade, especially knowing my family is drinking clean, mineral-balanced water without the expense or waste of plastic bottles 🙂

Why Trust Us?

We’re a UK-based professional cleaning team with years of hands-on experience in homes of all shapes and sizes. From deep cleans in busy family kitchens to quick refreshes in rental flats, we’ve used more cleaning products and household tools than we can count. Some are brilliant. Others don’t live up to the hype.

This blog was created to share what actually works. Every recommendation is based on practical use, customer feedback, and what holds up in real homes. If a product doesn’t save time, improve results, or make life easier, it doesn’t make the cut.

We focus on tools that perform under pressure, not just ones that look good on the shelf. We only bring you the best, and that’s a promise 🙂

Final Thoughts on this iSpring Filter Review

If you’re serious about improving water quality at home, the iSpring RCC7AK delivers on every front. With advanced multi-stage filtration, mineral enhancement, and NSF certifications, it’s one of the most complete reverse osmosis systems available to UK households.

While installation takes a bit more effort than simpler models, the long-term benefits – cleaner water, better taste, and healthier hydration—are absolutely worth it.

Compared to something like the Waterdrop 15UB Under Sink Filter System (I’ve also done a full review on the Waterdrop Filter), which is more compact and easier to install, the iSpring offers deeper purification and mineral restoration, making it better suited for homes with harder water or higher contamination concerns.

If your priority is maximum contaminant removal and balanced pH, iSpring is the clear winner. Whether you’re replacing a basic tap filter or looking for a serious upgrade, the iSpring RCC7AK provides exceptional value and performance.