1-1/2" Aluminum Air Release & Vacuum Relief Vent – Simple Action FNPT
$22.87
1-1/2" simple-action aluminum air release and vacuum relief vent — prevents water hammer, air locks, and pipeline collapse in pressurized irrigation systems. Automatically expels trapped air during system startup and admits air during shutdown. Cast aluminum body is lightweight and corrosion-resistant. Rated to 150 PSI with a 7 PSI sealing pressure.
| Size | 1-1/2" |
|---|---|
| Connection | FNPT |
| Valve Action | Air Expulsion & Admission |
| Max Pressure | 150 PSI |
| Sealing Pressure | 7 PSI |
Availability:
In stock
SKU
RKARV-150
Ships Same Day
All orders placed by 12 PM local warehouse time will ship the same day. Some exclusions apply. Delivery time may increase if item isn't available in closest warehouse.
Delivery time: 2-4 business days
RKARV-150 – 1-1/2" Aluminum Air Release & Vacuum Relief Vent
The RKARV-150 is a 1-1/2" simple-action aluminum air vent designed for mid-size commercial irrigation mainlines. It automatically expels trapped air during system startup and admits air during shutdown, preventing water hammer, air locks, and vacuum-induced pipe collapse.
Key Features & Benefits
- Dual-function operation — expels air during filling and admits air during drainage to prevent vacuum collapse
- Cast aluminum body — lightweight at 1.16 lbs for easy installation on risers and high points
- 1.2" clear opening diameter — allows rapid air expulsion for faster system startup
- Corrosion-resistant construction — withstands outdoor agricultural environments season after season
- Synthetic rubber seal — ensures positive sealing even at low head applications (7 PSI sealing pressure)
- Simple, reliable design — no complex moving parts means trouble-free performance with minimal maintenance
Why Air Vents Matter
Trapped air in irrigation pipelines causes reduced flow, pressure surges (water hammer), inaccurate flow meter readings, and potential pipe damage. Install air vents at all high points in your mainline and at the end of lateral runs to ensure efficient, reliable system operation.
Materials & Construction
- Body: Aluminum
Download Specification Sheet
Dimensions - Inches
| Size | Nominal | Clear Opening Diameter | Height | Width | Weight |
|---|---|---|---|---|---|
| 1" | 1 | 0.7 | 4.2 | 2.2 | 0.55 lbs |
| 1-1/2" | 1.5 | 1.2 | 4.9 | 3.3 | 1.16 lbs |
| 2" | 2 | 1.9 | 5.8 | 3.4 | 1.65 lbs |
| 3" | 3 | 2.6 | 7.9 | 4.9 | 3.63 lbs |
| 4" | 4 | 3.4 | 9.8 | 7.1 | 6.72 lbs |
Dimensions - Millimeters
| Size | Nominal | Clear Opening Diameter | Height | Width | Weight |
|---|---|---|---|---|---|
| 1" | 25.4 | 17 | 106.5 | 55 | 0.55 lbs |
| 1-1/2" | 38.1 | 29.5 | 123.5 | 82.5 | 1.16 lbs |
| 2" | 50.8 | 48 | 145.5 | 88 | 1.65 lbs |
| 3" | 76.2 | 64.5 | 200 | 124 | 3.63 lbs |
| 4" | 101.6 | 87 | 247.5 | 180.5 | 6.72 lbs |
