--- product_id: 8390233 title: "Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4\" NPT" brand: "grundfos" price: "236.13 DT" currency: TND in_stock: true reviews_count: 5 category: "Grundfos" url: https://www.desertcart.tn/products/8390233-grundfos-519603-cast-iron-flange-set-for-up-series-circulator store_origin: TN region: Tunisia --- # Complete kit: flanges, gaskets, bolts & nuts 1-1/4" NPT precision fit Durable cast iron construction Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4" NPT **Brand:** grundfos **Price:** 236.13 DT **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your pump game with the ultimate flange set—because your system deserves the best! ## 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?** 236.13 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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 - • **Built to Last:** Robust cast iron material guarantees long-term durability and resistance to wear in demanding plumbing environments. - • **Precision Engineered Fit:** 1-1/4" NPT connections ensure seamless compatibility with Grundfos UP Series pumps for hassle-free installation. - • **Optimized for Performance:** Designed specifically for UP and UPS series circulator pumps to maintain peak system efficiency. - • **Trusted Brand Reliability:** Grundfos, a leader in pump technology, delivers consistent quality that professionals rely on. - • **All-in-One Installation Kit:** Includes 2 flanges, 2 gaskets, and 4 bolts with nuts—everything you need to upgrade or replace with confidence. ## Overview The Grundfos 519603 Cast Iron Flange Set is a precision-engineered plumbing accessory designed for 1-1/4" NPT connections compatible with Grundfos UP Series circulator pumps. Crafted from durable cast iron, this kit includes 2 flanges, 2 gaskets, and 4 bolts with nuts, providing a complete solution for reliable, long-lasting pump flange installation. ## 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: Make sure it's all you need! - The flanges, gaskets and nuts and bolts are not including when purchasing the pump. I feel they should be!! Review: Grundfos - Grundfos. The standard I rely on for my heating system. ## 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 | | Best Sellers Rank | #376,448 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #628 in Water Pump Accessories | | Brand | Grundfos | | Brand Name | Grundfos | | Color | Black | | Connector Type | NPT | | Customer Reviews | 4.5 out of 5 stars 25 Reviews | | Global Trade Identification Number | 00632514024649 | | Included Components | Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4" NPT | | Item Dimensions | 8 x 4 x 6 inches | | Item Type Name | Grundfos 519603 Cast Iron Flange Set for UP Series Circulator Pumps - 1-1/4" NPT | | Item Weight | 1.22 Pounds | | Item dimensions L x W x H | 8 x 4 x 6 inches | | Manufacturer | Grundfos | | Manufacturer Part Number | 519603 | | Material | Cast Iron | | Material Type | Cast Iron | | Model Number | 519603 | | Number of Pieces | 8 | | Set Name | Grundfos UP Series Circulator Pumps Flange Set (2 Flanges, 2 Gaskets, 4 Bolts and Nuts) | | Size | 379 | | Thread Size | 1-1/4" NPT | | Thread Type | NPT | | UPC | 632514024649 735090478179 | | Unit Count | 1.0 Count | ## 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 ### ⭐⭐⭐⭐⭐ Make sure it's all you need! *by K***C on February 26, 2026* The flanges, gaskets and nuts and bolts are not including when purchasing the pump. I feel they should be!! ### ⭐⭐⭐⭐⭐ 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/8390233-grundfos-519603-cast-iron-flange-set-for-up-series-circulator](https://www.desertcart.tn/products/8390233-grundfos-519603-cast-iron-flange-set-for-up-series-circulator) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-09*