Waterdrop G5P700 Reverse Osmosis Water Filter - Fast 700GPD Flow

In this review the Waterdrop G5P700 stands out as a practical under-sink reverse osmosis option for households that want fast, reliable drinking water without a bulky tank. The single biggest reason to consider it is the combination of a 700GPD high-speed flow and a compact tankless design, which delivers near-instant filtered water and frees up valuable kitchen space. Installation is straightforward for those comfortable with basic plumbing, and the unit focuses on measurable contaminant reduction and improved taste.

Key Features

• 7-Stage Filtration: A multi-stage purification process reduces PFOA, PFOS, chlorine, lead, fluoride and other contaminants to improve safety and flavor.
• 0.0001m RO Membrane: The fine membrane blocks particles larger than 0.0001m, helping produce clean, refreshing drinking water.
• Compact Tankless Design: The tankless format saves up to 70% of kitchen space compared with traditional tank systems and fits neatly under most sinks.
• 700GPD Fast Flow: High capacity means rapid dispensing-about a 6-ounce cup in roughly 6 seconds-useful for busy families or frequent use.
• 21 Pure-to-Drain Ratio: The system generates a higher proportion of purified water versus waste compared with many older RO units, helping reduce overall water use.

Who It's For

The G5P700 is best for homeowners and renters who want a fast, compact reverse osmosis unit that delivers high-quality drinking water without a bulky storage tank. It is especially useful in kitchens where counter and cabinet space is limited and where immediate access to filtered water is preferable.

Those who should look elsewhere include users who cannot drill a countertop hole for faucet installation or who need an under-sink system with an integrated storage tank for very high-demand situations where brief peak flow matters more than continuous output.

Pros & Cons

Pros

• High-speed 700GPD capacity provides near-instant access to water for drinking and cooking.
• Tankless layout preserves up to 70% of under-sink space compared with tank systems.
• Seven-stage filtration and a 0.0001m membrane substantially improve taste and reduce many contaminants.
• Smart LED faucet and sturdy build add convenience and a modern look to the sink area.

Cons

• Faucet installation requires drilling a hole in the countertop, which may not suit all kitchens or renters.
• While most customers report no leaks, a minority noted steady drips, so careful installation and occasional checks are advisable.

Specifications

Filtration Stages	7-Stage Filtration
RO Membrane Rating	0.0001m
Flow Capacity	700GPD
Pure-to-Drain Ratio	21:1 (high-efficiency)
Design	Compact tankless under-sink system
Faucet Dimensions	5.6 in L x 3.2 in W x 13 in H

Our Verdict

The Waterdrop G5P700 is a strong choice for anyone seeking fast, space-saving reverse osmosis with solid contaminant reduction and noticeably better tasting water. Its tankless form and 700GPD output make it good value for busy households, provided you can accommodate the drilled faucet installation and follow recommended installation checks to avoid leaks.

Frequently Asked Questions

Does the system require a storage tank?
The G5P700 uses a tankless design, which provides continuous flow without a separate storage tank.

Will the faucet require modification of my countertop?
Yes, faucet installation requires drilling a hole in the countertop, so plan accordingly for permanent installation.

How does the unit affect water taste?
The 7-stage filtration and 0.0001m membrane reduce chlorine, heavy metals and other contaminants, which customers report improves water taste and odor.