---
product_id: 8390233
title: "Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4\" NPT"
brand: "grundfos"
price: "₨23831"
currency: LKR
in_stock: true
reviews_count: 2
category: "Grundfos"
url: https://www.desertcart.lk/products/8390233-grundfos-519603-cast-iron-flange-set-for-up-series-circulator
store_origin: LK
region: Sri Lanka
---

# Durable cast iron build 1-1/4" NPT precision fit Complete flange kit included Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4" NPT

**Brand:** grundfos
**Price:** ₨23831
**Availability:** ✅ In Stock

## Summary

> 🛠️ Upgrade your pump game with the ultimate flange set—don’t get left behind!

## Quick Answers

- **What is this?** Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4" NPT by grundfos
- **How much does it cost?** ₨23831 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/8390233-grundfos-519603-cast-iron-flange-set-for-up-series-circulator)

## 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

- • **Compact & Lightweight:** At just 1.22 lbs and 8x4x6 inches, it’s easy to handle and install in tight spaces
- • **Trusted Brand Assurance:** Official Grundfos part ensures reliability and peak pump performance
- • **Precision 1-1/4" NPT Fit:** Seamlessly compatible with Grundfos UP Series pumps for hassle-free installation
- • **All-in-One Installation Kit:** Includes 2 flanges, 2 gaskets, 4 bolts & nuts—everything you need in one package
- • **Rugged Cast Iron Durability:** Engineered to withstand high pressure and long-term wear without compromise

## Overview

The Grundfos 519603 Cast Iron Flange Set is a robust, precision-engineered plumbing fitting designed specifically for UP Series circulator pumps. Featuring a 1-1/4" NPT connection, this kit includes all necessary components for quick installation and long-lasting durability, making it the go-to choice for professionals seeking reliable pump support.

## Description

Product Description Grundfos 519603 Cast Iron Flange Set is compatible with Grundfos UP Series Circulator Pumps. This kit includes (2) flanges, (2) gaskets and (4) bolts and nuts. Features NPT end connections and a 1-1/4" fitting size. Constructed of durable cast iron material. Check manufacturer recommendations to ensure a proper fit. From the Manufacturer Grundfos cast iron flange sets include: 2 each - flanges, gaskets, bolts with nuts. Use with Versa Flo UP and UPS pumps.

Review: Grundfos - Grundfos. The standard I rely on for my heating system.
Review: Picture is misleading....... ... - Picture is misleading....... Needed the 3/4" flanges that is compatible with the pump I ordered...... NOT THE 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 |
|---------------|-------|
| Manufacturer | Grundfos |
| Part Number | 519603 |
| Item Weight | 1.22 pounds |
| Product Dimensions | 8 x 4 x 6 inches |
| Item model number | 519603 |
| Is Discontinued By Manufacturer | No |
| Size | 379 |
| Color | Black |
| Material | Cast Iron |
| Item Package Quantity | 1 |
| Included Components | Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4" NPT |
| Batteries Included? | No |
| Batteries Required? | No |

## Images

![Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4" NPT - 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".

## Customer Reviews

### ⭐⭐⭐⭐⭐ Grundfos
*by J***Z on November 2, 2015*

Grundfos. The standard I rely on for my heating system.

### ⭐⭐⭐ Picture is misleading....... ...
*by H***C on May 13, 2017*

Picture is misleading....... Needed the 3/4" flanges that is compatible with the pump I ordered...... NOT THE 1 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.lk/products/8390233-grundfos-519603-cast-iron-flange-set-for-up-series-circulator](https://www.desertcart.lk/products/8390233-grundfos-519603-cast-iron-flange-set-for-up-series-circulator)

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-24*