Description
The Resideo WT8840A1000/U Water Heater Gas Control Valve is a trade replacement natural gas valve designed for Bradford White® and A.O. Smith® standing pilot water heaters with 1″ insulation thickness. This integrated gas control regulates burner operation while maintaining accurate water temperature and safety shutdown protection.
Powered by a thermopile generated from the standing pilot flame, the WT8840 operates without external electrical power. The built-in NTC temperature sensor and temperature cut-off protection continuously monitor water temperature to ensure safe and reliable heater performance.
Designed as a direct replacement for Honeywell WV8840 series valves, this control restores proper heating operation in residential gas water heaters experiencing temperature regulation or gas control failure.
Features:
- Direct Replacement Gas Valve for Bradford White and A.O. Smith standing pilot water heaters
- Thermopile Powered Operation requires no external electrical connection
- Integrated Temperature Sensor provides accurate water temperature control
- Built-In Safety Shutoff protects against overheating conditions
- Replaces Honeywell WV8840 Series gas control valves for reliable restoration
Replaces Part Numbers:
- WV8840A1000
- WV8840A1001
- 222-47463-01 Series












Scott –
Barbara Negron Garcia –
Desmond Harvey –
Alana –
I have not yet installed the control valve, but the service, through purchase and delivery as been exceptional. Shipment was rapid. A smooth purchase/payment, and the valve is ‘in hand’. It will be installed soon, and I do not anticipate any difficulty.
Jamison L. –
Pat –
Barb C. –
Paid for Honeywell but part sent was off brand.
Ben (verified owner) –
Part was a exact fit and is working great.
Jozef Gruz (verified owner) –
Thank you for excellent service!
Loretta S. (verified owner) –
Theodore Abner (verified owner) –
David Campbell (verified owner) –
Anonymous (verified owner) –
Part was as promised and arrived quickly. Would buy from again!
Lewis Jones (verified owner) –
Matthew N. (verified owner) –
Very fast delivery. Got the right part and fixed water heater
Marc Beck (verified owner) –
Michele (verified owner) –
Pilot light would not stay lit. This part was replaced and so far it’s kept my water heater working.
drew wood (verified owner) –
I haven’t attempted to install the part yet, but it’s got a big scratch on the front above the status light and almost looks like it’s refurbished or has been used before.
Terry K. (verified owner) –
correct fit with no issues
James (verified owner) –
This was the correct aprt to fix my issue. A qucik Google search and I was able to change it myself and save $$$ on the install and the price of the part. Jackson Systems confirmed the part and shipped it qucikly. If I ever need something related again, I will shop with them first.