
Hayward CAT 4000 Commercial Water Chemistry Controller with WiFi W3CAT4000WIFI
Description
The Hayward CAT 4000 is a commercial water chemistry controller that connects to the PoolComm platform for remote monitoring of your pool water quality. Once you activate your wireless account, your personal PoolComm account lets you view water-quality data, print charts, analyze graphs, customize settings, and receive alarm notifications by email or SMS. This package includes a WiFi transceiver, and the wireless link to PoolComm offers extensive North American coverage with 24/7 monitoring. The controller is simple to install and operate through easy menus and a bright alphanumeric display, and it is compatible with existing chemical feed equipment to minimize initial investment. It comes complete with CAT Professional Series pH and ORP sensors for outstanding performance, and optional WiFi or cellular communication provides free PoolComm access. The CAT 4000 is NSF/ANSI Standard 50 certified.
Features
- Wireless link to the PoolComm platform with extensive North American coverage and 24/7 monitoring
- View water-quality data, print charts, analyze graphs, and receive email or SMS alarm notifications
- Simple to install and operate via easy menus and a bright alphanumeric display
- Compatible with existing chemical feed equipment to minimize initial investment
- Includes CAT Professional Series pH and ORP sensors
- Optional WiFi or cellular communication with free PoolComm access
- NSF/ANSI Standard 50 certified
Specifications
- Part Number: W3CAT4000WIFI
- Type: Commercial water chemistry controller
- Series: CAT 4000
- Communication: WiFi transceiver included (cellular optional)
- Platform: PoolComm remote monitoring
- Included Sensors: CAT Professional Series pH and ORP
- Certification: NSF/ANSI Standard 50
- Application: Commercial pools
- Shipping Dimensions: 8.5 in x 18 in x 23.5 in
- Shipping Weight: 14 lb
- Warranty: 5 year limited on controller, 2 year on sensors
Shipping & Returns
Shipping: We offer free standard shipping on all orders within the contiguous United States (lower 48). We do not currently ship to Alaska, Hawaii, or Puerto Rico. Any other restrictions will be shown at checkout. We do not currently ship internationally. Orders ship within 1 to 2 business days, and delivery typically takes 4 to 6 business days after shipping, for a total of about 5 to 8 business days from your order date.
Tracking information is emailed once your order ships. We do not currently offer international shipping. See our full Shipping Policy for full details.
Returns: Unused items in their original packaging may be returned within 30 days of delivery. To start a return, request a Return Merchandise Authorization (RMA) by emailing support@nationalpoolsupply.com or calling +1 978-222-0628 with your order number and the reason for the return (include photos if the item is defective, damaged, or incorrect). Once your RMA is approved, ship the item with your RMA number to: DHB Enterprises LLC / National Pool Supply, 30 Log Bridge Rd, Building 300, Unit 301, Middleton, MA 01949. Change-of-mind returns: you pay return shipping, and a 15% restocking fee applies; original shipping costs are not refunded. Defective, damaged, or incorrect items reported within 30 days of delivery are returned at no cost to you with a prepaid label, and no restocking fee applies. See our full Refund and Returns Policy for full details.
Warranty
Manufacturer Warranty:
This product carries the manufacturer's warranty, where applicable. Warranty terms, coverage, and exclusions are set by the manufacturer. Warranty claims are filed directly with the manufacturer; we do not process warranty claims or offer a separate warranty of our own. If you need the manufacturer's contact details, contact us and we will share them. See our Warranty page for details.

Pool and Spa Parts & Supplies
Why Choose National Pool Supply?
We're dedicated to offering pool and spa products from leading brands. At National Pool Supply, your pool’s care is our priority, and we’re here to make your experience effortless.




