# Caleffi 1/2" Male NPT Vacuum Relief Valve 304040A

**Brand:** [Caleffi](https://shop.coreranger.com/brands/Caleffi)
**SKU:** 304040A
**Price:** $46.12 · in stock
**URL:** https://shop.coreranger.com/product/caleffi-1-2-male-npt-vacuum-relief-valve-304040a-700050917

## Specifications

| Spec | Value |
|---|---|
| Model # | 304040A |
| Internet # | 700050917 |
| Returnable | 90-Day |
| Store SKU # | 1015899249 |
| HVAC Product Type | Relief Valve |
| Product Depth (in.) | 3 in |
| Product Width (in.) | 1.75 in |
| Product Height (in.) | 1.5 in |
| Product Weight (lb.) | 0.22 lb |
| Manufacturer Warranty | 90 day parts warranty. |
| Brand/Model Compatibility | Caleffi |

## Description

The Caleffi 304040A Vacuum Relief Valve features a 1/2" MNPT connection and helps prevent siphon conditions by admitting air under negative pressure in HVAC systems. This OEM valve matches factory specifications for reliable replacement.