---
product_id: 250012105
title: "GRUNDFOS 519603"
brand: "grundfos"
price: "£34.00"
currency: GBP
in_stock: true
category: "Grundfos"
url: https://www.desertcart.co.uk/products/250012105-grundfos-519603
store_origin: GB
region: United Kingdom
---

# 1-1/4" NPT precision fit Durable sleek black finish Complete 8-piece flange kit GRUNDFOS 519603

**Brand:** grundfos
**Price:** £34.00
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade your pump game with precision and style!

## Quick Answers

- **What is this?** GRUNDFOS 519603 by grundfos
- **How much does it cost?** £34.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/250012105-grundfos-519603)

## Best For

- grundfos enthusiasts

## Why This Product

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

## Key Features

- • **Optimized Size:** 1-1/4" NPT thread size designed for secure, leak-proof connections in professional setups.
- • **All-Inclusive Kit:** Includes 2 flanges, 2 gaskets, and 4 bolts & nuts—everything you need in one package.
- • **Robust Build Quality:** Crafted with durable materials and a sleek black finish to ensure longevity and style.
- • **Precision Engineered Fit:** Seamlessly compatible with Grundfos UP Series circulator pumps for hassle-free installation.
- • **Trusted Brand Reliability:** Backed by Grundfos, a global leader with a 4.8-star rating from industry professionals.

## Overview

The Grundfos 519603 flange kit offers a precision 1-1/4" NPT connection compatible with Grundfos UP Series circulator pumps. This all-in-one kit includes 2 flanges, 2 gaskets, and 4 bolts and nuts, ensuring a secure and durable installation. Finished in sleek black, it combines professional-grade materials with trusted brand reliability, making it a must-have for efficient plumbing solutions.

## Description

519603, Grundfos Pumps Corp., Flange 1-1/4"

## Features

- Fitting Size: 1-1/4" NPT
- NPT end connections
- Compatible with Grundfos UP Series Circulator Pumps
- Kit includes (2) flanges, (2) gaskets and (4) bolts and nuts
- Check manufacturer recommendations to ensure a proper fit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0039PO22K |
| Brand | Grundfos |
| Colour | Black |
| Connector Type | NPT |
| Customer Reviews | 4.8 4.8 out of 5 stars (22) |
| Global Trade Identification Number | 00632514024649 |
| Item Dimensions | 20.3 x 10.2 x 15.2 centimetres |
| Item Weight | 1.22 Pounds |
| Manufacturer | Grundfos Pumps Corp. |
| Material | Other |
| Model Number | 519603 |
| Number of Packs | 1 |
| Number of Pieces | 8 |
| Part Number | 519603 |
| Size | 379 |
| Thread Size | 1-1/4 inches NPT |
| Thread Type | NPT |
| UPC | 632514024649 735090478179 |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Grundfos
- **Colour:** Black
- **Connector type:** NPT
- **Item dimensions L x W x H:** 20.3 x 10.2 x 15.2 centimetres
- **Item weight:** 1.22 Pounds
- **Material:** Other
- **Number of pieces:** 8
- **Size:** 379
- **Thread size:** 1-1/4 inches NPT
- **Thread type:** NPT

## Images

![GRUNDFOS 519603 - Image 1](https://m.media-amazon.com/images/I/61luHiue4dL.jpg)

## Questions & Answers

**Q: What is the distance between the bolt holes ? Thanks**
A: Center to center is 3-1/4" for the Grundfos flanges.

**Q: What is the total lenght of the flange ? Thanks**
A: Total length of the Grundfos flange is 4-1/4". The holes center to center is 3-1/4".

## Frequently Bought Together

- Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps-1-1/4 NPT, Black
- Grundfos 59896341 UPS15-58FC Super Brute Circulator, Red, Small
- HYDRO MASTER Universal Pump Flange Gasket (Set of 2)

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**Shop now:** [https://www.desertcart.co.uk/products/250012105-grundfos-519603](https://www.desertcart.co.uk/products/250012105-grundfos-519603)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-10-20*