How to Measure Your Filter
Steps 1 & 2
Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).


Step 3
Measure the thickness (Depth) of your filter from front to back.

Step 4
Put Your measurements together (L x W x D).

Actual Size
A filterโs true dimensions.
Example: 19.75โ x 19.75โ x 1โ
Nominal Size
Rounded numbers used by manufacturers.
Example 20โ x 20โ x 1โ
View Detailed InstructionsAbout Waterdrop C1H Instant Hot Water Reverse Osmosis System

2X Reward Points on CoreRO system purchases. Redeem your points for a 10% coupon, replacement filters, and more.

Receive a 5% OFF coupon (exclusive for C1 replacement filter) with no expiration.
*The discount code will be sent via email within 3 days after the purchase of C1.

Extended 60-Day Return Period





Get the highlights.
5-stage RO Filtration.


3s Instant Hot.

Easy to Operate.
5 Temperature Options
Room temp
Fresh water
113โ
Oatmea
140โ
Baby formula
185โ
Coffee
203โ
Tea
5 Water Volume Options





Fits Every Countertop.
Installation-free Design
Put in anywhere you want

Kitchen

Living room

Office

RV


Protect the environment.


