Watts
Watts HAV 1/4 Automatic Vent Brass
Automatic air vent removes trapped air from hot-water systems through a 1/4-inch NPT male inlet in a vertical brass body
- TypeOther
- Automatically releases trapped air to maintain water flow
- Brass body resists corrosion for long service life
- Male 1/4 in NPT inlet fits standard hot-water piping
- Vertical mounting with single-port design simplifies installation
- ABS cap protects internal mechanism from debris
Automatic Air Vent for Hot Water
The Watts HAV 1/4 Automatic Vent releases trapped air from hot-water systems through a single bottom-mounted port. Its brass body and ABS cap suit residential and light-commercial plumbing installations where reliable air removal is required. Vertical orientation ensures proper float operation during normal system cycling.
1/4-inch NPT male inlet with one-port configuration
The 1/4-inch NPT male thread connects directly to compatible fittings without an included expansion-tank port. Brass construction handles typical hot-water temperatures and pressures found in hydronic heating and domestic hot-water loops. No additional connection sizes or types are provided for other pipe diameters.
Brass body and ABS cap materials
The metal body resists corrosion from treated water while the plastic cap protects the internal float mechanism. Vertical installation allows gravity to seat the vent correctly during fill and drain cycles. California Proposition 65 warnings apply for chemicals known to cause cancer and reproductive harm.
Highlights
- Automatically releases trapped air to maintain water flow
- Brass body resists corrosion for long service life
- Male 1/4 in NPT inlet fits standard hot-water piping
- Vertical mounting with single-port design simplifies installation
- ABS cap protects internal mechanism from debris
Specifications
| Brand | WATTS |
|---|---|
| Type | Other |
Questions about this item
Will the 1/4 in male NPT inlet thread directly into the existing port on my older expansion tank?
The inlet is a 1/4 in male NPT thread designed for vertical installation at the bottom of the tank. If the existing tank port matches that size and thread type, it will connect directly without an adapter.
How can I confirm the automatic vent is releasing air correctly after I install it?
During system fill or heating cycles, listen for a brief hissing sound as air escapes through the vent cap. Once water reaches the internal float, the vent should close silently, indicating normal operation.
Does the package include the expansion tank connection or any sealing tape for the NPT threads?
The box contains the automatic vent body with its ABS cap only. The expansion tank connection is not included, and thread sealant or tape for the 1/4 in NPT inlet must be purchased separately.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
PU Leather Square Tissue Box Holder Magnetic Closure Black Vertical Stripes
$21.99
0.00025732BTC
In stock
