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This Honeywell WT8840A1000 is a replacement gas valve for natural gas water heaters.
It's a standing pilot model with a built-in piezo igniter, so you can light the pilot without matches or lighters – just push the button and spark it.
The spud size is 1 inch, and it's rated for 4 inches of water column pressure, which is standard for most residential water heaters.
It meets CSA 6.
20/4.
6, ANSI Z21.
20/Z21.
23/Z21.
78/Z21.



Installation is straightforward for a qualified technician – just swap out the old valve and connect your pilot tube and thermocouple.
Compact design with dimensions around 5.
5 x 5.


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If your water heater's gas valve is acting up, this is the direct replacement you need.
Reliable, safe, and backed by Honeywell's reputation.
4.8 out of 5