Watts Premier Reverse Osmosis Systems: 3 Picks Ranked by Specs

Quick picks

Our 3 picks

1 Best overall

Watts Premier UF-3 Ultra Filtration

Best for: compact under-counter sediment and VOC reduction

Filtration Stages

3

Design

Under counter

Certification

WQA

Contaminants Removed

Sediment, VOCs

Installation Type

Under counter

Micron Rating

0.1 micron

View on Amazon: Watts Premier UF-3 Ultra Filtration Affiliate link

The Watts Premier UF-3 is a three-stage under-counter ultra filtration system. It uses a 0.1-micron hollow-fiber membrane and LVOC carbon filter to treat water. The unit operates without electricity or a holding tank. It fits in tight spaces at 8 by 15 by 9 inches. This system suits you if you want simple, tool-free maintenance and effective sediment and VOC reduction.

Pros

• Three-stage filtration with 0.1-micron hollow-fiber membrane
• No electricity or holding tank required
• Push-button filter replacement without tools
• Compact 8-inch width for under-counter use

Cons

• Only three filtration stages compared to four-stage RO options
• Does not remove dissolved solids like reverse osmosis membranes
• No smart monitoring or app connectivity

Good fit if

• You need a compact system that fits under small sinks
• You want to avoid electrical outlets near your plumbing
• You prefer simple filter changes without special tools

Skip if

• You require removal of dissolved minerals and salts
• You need a four-stage purification system
• You want remote monitoring of filter life

Verdict: Watts Premier UF-3 Ultra Filtration System is a compact, low-maintenance option for basic sediment and VOC reduction. It fits buyers who prioritize easy installation and small footprints over comprehensive dissolved solid removal.

2 Best premium

Watts Premier Zero Pure Plus Brushed Nickel

Best for: homes needing VOC removal and dedicated power

Filtration Stages

4

Capacity (GPD)

50 GPD

Design

Under sink

Filtration Type

Reverse osmosis

Contaminants Removed

Dirt, silt, rust, chlorine, VOCs

Installation Type

Under sink

View on Amazon: Watts Premier Zero Pure Plus Brushed Nickel Affiliate link

The Watts Premier RO Zero Pure Plus is a 4-stage under-sink reverse osmosis system with a 50 GPD membrane. It includes a 3-gallon storage tank and a ZeroWaste pump with solenoid. The unit features color-coded filters and a brushed nickel faucet. It requires a dedicated 110V outlet and specific clearance from water heaters. This system suits you if you want comprehensive filtration for VOCs and dissolved solids.

Pros

• 4-stage filtration reduces VOCs, chlorine, and dissolved solids
• Includes ZeroWaste pump with solenoid for efficient water use
• Color-coded filters with push-button release for easy changes
• 50 GPD membrane capacity with 3-gallon storage tank

Cons

• Requires a dedicated 110V electrical outlet near the sink
• Must be installed at least 25 pipe feet from water heater
• Not compatible with homes using tankless water heaters

Good fit if

• You need a complete system that removes volatile organic compounds
• You have a dedicated 110V outlet under your sink
• You want color-coded filters for simple maintenance

Skip if

• You do not have access to an electrical outlet under the sink
• Your home uses a tankless water heater
• You cannot maintain a 25-foot distance from your water heater

Verdict: Watts Premier RO Zero Pure Plus 4-Stage delivers robust 4-stage filtration with a dedicated pump for homes needing VOC removal. It fits you if you have the required electrical setup and space to meet installation clearance rules.

3 Best budget

Watts Premier Booster Pump Kit

Best for: Low water pressure under 40 psi

Features

Booster Pump

Color

Black

Dimensions

10 × 6 × 6 inches

Weight

7.05 pounds

View on Amazon: Watts Premier Booster Pump Kit Affiliate link

This Watts Premier booster pump kit increases water flow for reverse osmosis systems facing low pressure below 40 psi. It includes a pump, 110V transformer, fittings, green tubing, and a tank pressure shutoff switch. The unit measures 10 by 6 by 6 inches and weighs 7.05 pounds. It operates quietly and works with standard manifold filter units. You get faster tank fill times and a steady filtered water supply.

Pros

• Increases water flow in low-pressure areas
• Includes tank pressure shutoff switch
• Operates quietly
• Compatible with standard manifold filter units

Cons

• Requires 110V transformer connection
• Adds 7.05 pounds to system weight
• Limited to 10-inch pump size

Good fit if

• You have water pressure lower than 40 psi
• You want faster tank fill times
• You need a quiet operation

Skip if

• You have standard water pressure above 40 psi
• You need a wireless smart connection
• You want a compact unit under 5 pounds

Verdict: Watts Premier Booster Pump Kit for RO solves low-pressure issues with a complete, quiet kit. It fits homes needing boosted flow for their reverse osmosis system.

Specifications side by side

Watts Premier RO Systems Overview

Watts Premier offers three distinct systems for different under-counter needs. The UF-3 Ultra Filtration is a compact unit measuring 8 by 9 inches. It weighs 6.6 pounds and targets basic sediment and VOC reduction. This model suits buyers prioritizing a small footprint and easy installation over comprehensive dissolved solid removal.

For deeper filtration, the Zero Pure Plus Brushed Nickel provides four stages. It measures 13 by 19 inches and weighs 23 pounds. This system includes a dedicated pump for homes needing specific electrical setups. If you have low water pressure, the Booster Pump Kit is a separate black unit. It measures 6 by 10 inches and weighs 7.05 pounds. It boosts flow for your existing reverse osmosis system.

Where Watts Premier Fits

Watts Premier covers a narrow range of under-counter needs. The UF-3 is the smallest option at 8 by 9 inches. It weighs 6.6 pounds and focuses on sediment and VOCs. The Zero Pure Plus is larger at 13 by 19 inches. It weighs 23 pounds and adds a dedicated pump for four-stage filtration. A separate booster pump kit is also available for low pressure. None of these systems include app connectivity or smart sensors. You will not find large commercial-grade tanks here. This brand suits homes needing compact, basic filtration or specific pressure boosts.

How to choose the right one

1. Check physical dimensions first

   Measure your under-counter space before buying. The Watts Premier UF-3 is compact at 8 by 9 inches. It weighs only 6.6 pounds. This small footprint suits tight cabinets. The Zero Pure Plus is larger at 13 by 19 inches. You must ensure your cabinet can fit these dimensions. Check the height and width clearance. A poor fit makes installation difficult. Compare the exact specs of each model against your available space. Do not guess the size.

2. Match filtration stages to needs

   Different systems offer different levels of filtration. The UF-3 targets basic sediment and VOC reduction. It is a simpler setup. The Zero Pure Plus uses a 4-stage process. It provides more robust filtration for homes needing deeper cleaning. You must decide if you need just sediment removal or full dissolved solid reduction. Check the stage count in the specs. More stages usually mean better water quality. Choose the system that matches your specific water concerns.

3. Verify electrical requirements

   Some systems require a power source. The Zero Pure Plus includes a dedicated pump. You need an electrical outlet under your sink for this unit. The UF-3 does not mention a pump. It may work without electricity. Check your available outlets. If you lack power, the UF-3 is a better fit. If you have power, the pump boosts performance. Always verify your electrical setup before purchasing a system with a pump.

4. Consider water pressure issues

   Low water pressure can hinder RO performance. If your home pressure is under 40 psi, you may need a booster. The Watts Premier Booster Pump Kit addresses this. It is a separate component measuring 6 by 10 inches. It weighs 7.05 pounds. You can add this to your existing system. Check your current water pressure first. If it is low, the booster kit is essential. It ensures proper flow rates for your filtration system.

5. Evaluate weight and stability

   Heavier units may need more support. The Zero Pure Plus weighs 23 pounds. It is significantly heavier than the UF-3. Ensure your cabinet shelves can hold this weight. The UF-3 weighs only 6.6 pounds. It is lighter and easier to handle. Consider the shelf strength in your kitchen. Heavier systems might require reinforced shelving. Lighter units are easier to install. Check the weight spec to plan your installation correctly.

Frequently asked questions

See also

• watts premier uf 3 three stage under counter vs water filtration
• watts premier ro zero pure plus review
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