Do new "o-rings" come with the filter kit? If not, what is the part number for the "o-rings" and where do you order them?

The O rings do not come with the replacement filters, you need to buy them from Water Express.

So the pentek, ispring, express, igeek and ect. filters will "all", work as long as the housing is 4.5 x 20"? but filter quality is diff?

Well dont know all those but If the housing is the same it should. I had ispring setup and just upgraded the filters to heavy metal filter set and they are great! No issues. Hope that helps

how to open the blue housing ? no matter what I tried I can not open the blue houseing to replace the filter

You first have to shut the water off to the system...Next you have to release the pressure in the system, there should be a red button on top of the system press that button and watch the pressure drop on the gauge..Note there will be some water so have a towel ready ..Next use the wrench that came with the system when you bought it ... It looks like a small tennis racket with no strings...slide that up the blue tube and spin it off....Note that the first time I had to change the filter the blue tube was on very tight ,so take your time and be careful....Hope I was able to help....

Will these cartridges fit the ISpring big blue system that uses the 4.5" x 20" filter cartridge?

Yes they will. Cartridge should say in details what size they are. I have used them in mine. Personally tho I feel the original name brand ones are better quality.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Express Water FLTWH2045CKS1 Whole House Heavy Metal Replacment Filter Set

Express Water FLTWH2045CKS1 Whole House Heavy Metal Replacment Filter Set

Product ID: 44881487

Details

Brand
EXPRESS WATER
External Testing Certification
WQA NSF Ro
Material
Polypropylene
Product Benefits
Removes and
Product Dimensions
4.5"D x 4.5"W

💧100,000 gallons filtration capacity

⚙️3-stage advanced filtration system

🛡️Heavy metal reduction with KDF tech

2022.66 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Description

🛠️ Elevate your home’s water game with pro-grade heavy metal defense!

PRESSURE PERFECT - High-capacity filters maintain water pressure without compromise.
CERTIFIED QUALITY - Backed by WQA, NSF, and Ro certifications for trusted performance.
WHOLE HOME PURITY - Comprehensive 3-stage filtration protects every tap in your house.
HEAVY METAL DEFENSE - KDF filter technology targets lead, iron, nickel, chromium & more.
ULTRA LONG FILTER LIFE - Filters up to 100,000 gallons, minimizing replacements and hassle.

The Express Water FLTWH2045CKS1 is a premium whole house heavy metal replacement filter set featuring a 3-stage filtration system with KDF technology. Designed to reduce harmful impurities including heavy metals like lead and iron, it delivers up to 100,000 gallons of clean water without sacrificing pressure. Certified by WQA, NSF, and Ro, this filter set ensures safer, cleaner water throughout your entire home while saving time and money on frequent replacements.

Specifications

ASIN	B01LVZ5RZO
Best Sellers Rank	#2,252 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Whole House Water Treatment Systems
Brand	EXPRESS WATER
Brand Name	EXPRESS WATER
Compatible Water Purifier Models	Express Water FLTWH2045CKS1
Customer Reviews	4.6 out of 5 stars 1,124 Reviews
External Testing Certification	WQA, NSF, Ro
Global Trade Identification Number	00641990965636
Included Components	KDF Filter, Activated Carbon Block Filter, Sediment Filter
Item Dimensions D x W x H	4.5"D x 4.5"W x 20"H
Item Highlight	High Capacity Filtration System, Removes Sediment and Heavy Metals, 5 Micron Filtration Efficiency
Item Type Name	Whole House Heavy Metal Water Filter Set
Manufacturer	Express Water
Manufacturer Part Number	FLTWH2045CKS1
Material	Polypropylene (PP)
Material Type	Polypropylene (PP)
Model Number	FLTWH2045CKS1
Number of Items	1
Product Benefits	Removes harmful impurities and heavy metals, saves time and money, extends appliance life
Product Dimensions	4.5"D x 4.5"W x 20"H
Set Name	Heavy Metal
UPC	641990965636
Unit Count	1 Count

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

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months 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.