Is it possible 1) to exchange the metal tank for a food grade plastic one of the same capacity and 2) add a UV filter to this system?

Dear Valued CustomerYes you can add UV to the system and about the tank we do not carry the plastic tank any more but let me give you some info about the tank Inside the tank is a bladder made of a material called butyl. Water does not touch the metal or plastic shell of the tank. It touches only the butyl bladder and spout (usually stainless steel or hard plastic) as it enters or leaves the tankA synthetic rubber, or Elastomer, butyl rubber is impermeable to air and used in many applications requiring an airtight rubberThis RO tank has been tested and certified by NSF International under NSF/ANSI Standard 58 for material and structural integrity.Best Regards

How do you know it is time to change the filters?

@Climers got it right. Most of the other answers are not, in that they suggest you to change filters AFTER you have detected something wrong at the output. Well, by that time, your RO membrane is kaput - no good any more. RO membranes are very sensitive to chlorine; so you must change your 3 front-line filters (1 sediment and 2 carbon) before they start to leak chlorine to the membrane. Doing so will prolong your membrane's life for many years. I have had a system working perfectly after 8+ years of continuous service, just by changing the first 3 filters regularly (yearly).

I just ordered the filter system, do you sell extra complete sets of the filters?

Yes, You can also get them at Walmart, Home Depot, Etc if you live where there is one.

What is the dimension of the manifold?

13" wide, 16" high, 6" deep. the tank if 12" in dia and 16" high

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

RO

Product ID: 7828266

Details

Brand
EXPRESS WATER
Capacity
4 gallons
Included Components
RO5DX Extra
Installation Type
Under Sink
Material
Brass Faucet
Package Information
Tank

💧50 GPD pure water output

🔧DIY easy under-sink install

🛡️99.99% impurity reduction

$1667.08

Duties & taxes included

In stock

Sold byAmazon Northern Mariana IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Northern Mariana Islands.

Secure transaction

Description

💦 Elevate your hydration game with crystal-clear confidence!

SLEEK SPACE SAVVY DESIGN - Compact under-sink system with deluxe chrome faucet fits seamlessly in modern kitchens.
PURE HYDRATION NO COMPROMISE - Experience ultra-clean water with 5-stage reverse osmosis removing lead, fluoride, PFAs, and more.
SMART LEAK DETECTION INCLUDED - Protect your home with built-in leak detection for peace of mind 24/7.
CERTIFIED QUALITY YOU CAN TRUST - NSF Certified 372 & 58 ensures your water meets the highest safety and purity standards.
EFFORTLESS SETUP INSTANT UPGRADE - Quick-connect tubing and included tools make installation a breeze—no plumber needed.

The Express Water RO5DX is a premium 5-stage under-sink reverse osmosis system delivering up to 50 gallons per day of purified water. Certified to NSF standards 372 & 58, it removes up to 99.99% of contaminants including lead, fluoride, PFAs, and chlorine. Designed for easy DIY installation with quick-connect fittings and a deluxe chrome faucet, it includes a 4-gallon storage tank and smart leak detection for reliable, safe hydration. Perfect for health-conscious professionals seeking superior water quality without the hassle.

Specifications

ASIN	B00J2DGTD8
Best Sellers Rank	#6,112 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Under-Sink & Countertop Filtration
Brand Name	EXPRESS WATER
Capacity	4 gallons
Container Type	Tank
Customer Reviews	4.6 4.6 out of 5 stars (6,144)
Global Trade Identification Number	00705332529235
Included Components	RO5DX, Extra Filter Set, Owners Manual
Installation Type	Under Sink
Item Dimensions L x W x H	14"L x 5"W x 15"H
Item Type Name	NSF Certified 5 Stage RO Water Filter System with Faucet and Tank – Under Sink Water Filter – plus 4 Filters – 50 GPD
Item Weight	31 pounds
LowerTemperature Range	39 °F
Manufacturer	Express Water
Material Type	Brass Faucet, Plastic System, Steel Tank
Maximum Flow Rate	0.8 gpm
Model Name	Reverse Osmosis Water Filtration System –
Model Number	RO5DX
Number of Items	1
Other Special Features of the Product	Reduce TDS
Part Number	RO5DX
Power Source	No Power Needed
Purification Method	Reverse Osmosis
Supported Water TDS Level Maximum (PPM)	300
UPC	705332529549 705332529235
Unit Count	1 Count
Upper Temperature Rating	100 °F

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

$1667.08

Duties & taxes included

In stock

Sold byAmazon Northern Mariana IslandsDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Northern Mariana Islands.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews