---
product_id: 55997447
title: "40400 W/CS CHECK VALVE CENTRAL PNEUMATIC 40400 AIR COMPRESSOR BRASS CV"
brand: "cp technology"
price: "C$7326"
currency: NIO
in_stock: true
reviews_count: 8
url: https://www.desertcart.ni/products/55997447-40400-w-cs-check-valve-central-pneumatic-40400-air-compressor
store_origin: NI
region: Nicaragua
---

# 10mm inlet tube compression fitting 1/2" NPT outlet fitting Cold start valve for easy startup 40400 W/CS CHECK VALVE CENTRAL PNEUMATIC 40400 AIR COMPRESSOR BRASS CV

**Brand:** cp technology
**Price:** C$7326
**Availability:** ✅ In Stock

## Summary

> ❄️ Start smart, run smooth – the valve your compressor deserves!

## Quick Answers

- **What is this?** 40400 W/CS CHECK VALVE CENTRAL PNEUMATIC 40400 AIR COMPRESSOR BRASS CV by cp technology
- **How much does it cost?** C$7326 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/55997447-40400-w-cs-check-valve-central-pneumatic-40400-air-compressor)

## Best For

- cp technology enthusiasts

## Why This Product

- Trusted cp technology brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Streamlined Airflow:** 10mm inlet tube compression fitting optimizes compressor efficiency
- • **Precision Fit & Seal:** 1/2" NPT outlet fitting ensures leak-proof connection to your tank
- • **OEM Certified Quality:** Genuine OEM part guarantees perfect compatibility and peace of mind
- • **Effortless Cold Starts:** Integrated cold start valve reduces startup strain and wear
- • **Durable Brass Construction:** Built to last with premium brass for reliable, long-term performance

## Overview

The 40400 W/CS Check Valve by Central Pneumatic is a genuine OEM brass check valve designed for air compressors, featuring a 1/2" NPT outlet fitting, 10mm inlet tube compression fitting, and an integrated cold start valve to ensure easy startup and reliable airflow control. Engineered for durability and precision, it’s the essential upgrade for professionals seeking seamless compressor performance.

## Description

GENUINE OEM AIR COMPRESSOR CHECK VALVE W/ COLD START VALVE PART # 40400CS

## Features

- GENUINE OEM AIR COMPRESSOR CHECK VALVE W/ COLD START VALVE
- PART # 40400CS
- 1/2" NPT outlet fitting to tank
- 10mm inlet tube compression fitting
- 6mm unloader fitting
- Equipped with cold / easy start valve.
- **NOTE: Will not replace the Aluminum check valve on these models.
- Packed With Care and Shipped ASAP!!!
- If you are unsure, please contact us with your model and serial number and we will be happy to help.

## Product Details

- **Material:** Aluminum
- **Brand:** CP Technology
- **Exterior Finish:** Aluminum
- **Inlet Connection Type:** Compression
- **Outlet Connection Type:** NPT
- **Number of Ports:** 3
- **Outlet Connection Size:** 0.5 Inches
- **Valve Type:** Ball Valve
- **Manufacturer:** Earthtec

## Images

![40400 W/CS CHECK VALVE CENTRAL PNEUMATIC 40400 AIR COMPRESSOR BRASS CV - Image 1](https://m.media-amazon.com/images/I/51RTyKuSYDL.jpg)
![40400 W/CS CHECK VALVE CENTRAL PNEUMATIC 40400 AIR COMPRESSOR BRASS CV - Image 2](https://m.media-amazon.com/images/I/41c26npZD+L.jpg)

## Questions & Answers

**Q: Does this include the additional fittings pictured?**
A: Yes, included

**Q: Just to confirm the fitting size, on the inlet side, is the diameter 16mm, and is able to accept a 10mm hardline with a 3/8 compression fitting?**
A: It fit perfect

**Q: Will this fit the 8 gal one too ?**
A: Yes, it fits the 8 gal too.  I will post an image

**Q: What Size ate the fittings**
A: Thread Diameter: 12mm/0.47"15mm/0.59"20mm/0.79"Total Size:44*44*30mm/1.73*1.73*1.18"

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fit like it was an OEM.
*by A***. on March 12, 2024*

Another piece of my air compressor rebuild puzzle. Fit perfectly on an old Harbor Freight 8-gallon compressor unit. Clean threads no burrs installed and works like it should.

### ⭐⭐⭐⭐⭐ The real deal
*by G***. on December 30, 2021*

I had to replace the check valve on a HF compressor l purchased many years ago...l ordered the valve from two other vendors and they were returned because the threads would not match up to the hoses correctly. Different threads from China--apparently.This one comes with the proper threaded nuts and it was an easy fix...this is the one you want if you are replacing the check valve on a HF model 40400 air compressor...if you don't get this one your wasting your time.

### ⭐⭐⭐⭐ Exact Part
*by A***  on August 10, 2021*

Exactly what I needed for the replacement item.

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**Shop now:** [https://www.desertcart.ni/products/55997447-40400-w-cs-check-valve-central-pneumatic-40400-air-compressor](https://www.desertcart.ni/products/55997447-40400-w-cs-check-valve-central-pneumatic-40400-air-compressor)

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-02-27*