---
product_id: 287743320
title: "Check valve, brass, 1\" NPT male in/ 1 FNPT out, Hallmark Industries (100NPT)"
brand: "h hallmark industries inc"
price: "€ 37.50"
currency: EUR
in_stock: true
reviews_count: 8
category: "H Hallmark Industries Inc"
url: https://www.desertcart.ie/products/287743320-check-valve-brass-1-npt-male-in-1-fnpt-out
store_origin: IE
region: Ireland
---

# Spring-loaded check valve for reliable flow control 1" NPT male in / 1" FNPT out precision fit Durable brass construction resists corrosion Check valve, brass, 1" NPT male in/ 1 FNPT out, Hallmark Industries (100NPT)

**Brand:** h hallmark industries inc
**Price:** € 37.50
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your plumbing game with precision and durability!

## Quick Answers

- **What is this?** Check valve, brass, 1" NPT male in/ 1 FNPT out, Hallmark Industries (100NPT) by h hallmark industries inc
- **How much does it cost?** € 37.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/287743320-check-valve-brass-1-npt-male-in-1-fnpt-out)

## Best For

- h hallmark industries inc enthusiasts

## Why This Product

- Trusted h hallmark industries inc brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Solid brass body offers superior corrosion resistance and long-term durability.
- • **Reliable Flow Control:** Spring-loaded mechanism prevents backflow, protecting your pumps and pipes effortlessly.
- • **Cost-Effective Quality:** Premium valve at a price that beats local stores—perfect for savvy buyers and contractors.
- • **Trusted by Professionals:** Highly rated with 4.6 stars and proven performance in well and river pump systems.
- • **Precision Fit Connections:** 1" NPT male inlet and 1" FNPT outlet ensure seamless integration with your plumbing system.

## Overview

The Hallmark Industries 1" brass check valve features a spring-loaded design with 1" NPT male inlet and 1" FNPT outlet connections. Crafted from corrosion-resistant brass, it ensures reliable backflow prevention for both amateur and professional plumbing applications. Highly rated for quality and durability, this valve offers excellent value and seamless integration into your system.

## Description

Check valve, brass, 1" NPT male in/ 1" FNPT out, precision spring loaded

Review: Works great - Works great for my river pump. Good quality check valve.
Review: Yes buy this it's as described and works great - High-quality and works great for our well system. Have had this for over a year now and still working great. I highly recommend this product as it is as described and size is perfect. The price is cheaper than local stores. I will purchase again for clients from this seller

## Features

- Check valve, brass, 1" NPT male in/ 1" FNPT out, (100NPT)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08N5CRSYY |
| Assembled Diameter | 1.89 Inches |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #79,644 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #130 in Check Valves |
| Brand | H HALLMARK INDUSTRIES INC |
| Color | Brass |
| Customer Reviews | 4.6 4.6 out of 5 stars (186) |
| Cutting Diameter | 1.89 Inches |
| Date First Available | November 10, 2020 |
| Exterior Finish | Brass |
| Included Components | Check valve |
| Inlet Connection Size | 1 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Item Package Quantity | 1 |
| Item Weight | 9.6 ounces |
| Item model number | SP0465X-100 |
| Manufacturer | Hallmark Industries |
| Material | Brass |
| Number of Ports | 2 |
| Outlet Connection Size | 1 Inches |
| Outlet Connection Type | FNPT |
| Part Number | SP0465X |
| Size | 100NPT |
| Usage | Amateur, Professional |
| Warranty Description | 1 year manufacturer |

## Product Details

- **Brand:** H HALLMARK INDUSTRIES INC
- **Exterior Finish:** Brass
- **Inlet Connection Size:** 1 Inches
- **Inlet Connection Type:** National Pipe Tapered
- **Item dimensions L x W x H:** 2.53 x 1.89 x 1.89 inches
- **Manufacturer:** Hallmark Industries
- **Material:** Brass
- **Number of Ports:** 2
- **Outlet Connection Size:** 1 Inches
- **Outlet Connection Type:** FNPT

## Images

![Check valve, brass, 1" NPT male in/ 1 FNPT out, Hallmark Industries (100NPT) - Image 1](https://m.media-amazon.com/images/I/31567-FINQL.jpg)
![Check valve, brass, 1" NPT male in/ 1 FNPT out, Hallmark Industries (100NPT) - Image 2](https://m.media-amazon.com/images/I/31Hlz5O-L6L.jpg)
![Check valve, brass, 1" NPT male in/ 1 FNPT out, Hallmark Industries (100NPT) - Image 3](https://m.media-amazon.com/images/I/41HrzoQZNuL.jpg)
![Check valve, brass, 1" NPT male in/ 1 FNPT out, Hallmark Industries (100NPT) - Image 4](https://m.media-amazon.com/images/I/41MF-6AxRCL.jpg)
![Check valve, brass, 1" NPT male in/ 1 FNPT out, Hallmark Industries (100NPT) - Image 5](https://m.media-amazon.com/images/I/41hk+P1ueAL.jpg)

## Questions & Answers

**Q: Can this be mounted either horizontal or vertically?**
A: Yes it can.

**Q: Does this check valve fit the hallmark industries ma0343x-4 deep well submersible pump, 1/2 hp**
A: Yes. Both have 1.25"NPT

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great
*by P***T on October 23, 2025*

Works great for my river pump. Good quality check valve.

### ⭐⭐⭐⭐⭐ Yes buy this it's as described and works great
*by M***O on March 15, 2025*

High-quality and works great for our well system. Have had this for over a year now and still working great. I highly recommend this product as it is as described and size is perfect. The price is cheaper than local stores. I will purchase again for clients from this seller

### ⭐⭐⭐⭐⭐ very useful
*by Y***A on December 12, 2025*

very useful

## Frequently Bought Together

- Hallmark Industries "Check valve, brass, 1" NPT male in/ 1 FNPT out" (SP0465X-100)
- Hallmark Industries MA0419X-12A, Deep Well Submersible Pump, 2HP, 230V 60HZ, 33 Gpm, Stainless Steel, for 4" or bigger well
- Well Pump Wire Splice Kit, Submersible 3M™ Dual Wall Heat Shrink Tubing and Copper Connector for 4 Wires, #10#12#14 AWG.

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-03-16*