What are the dimensions of these flanges? Specifically how far apart are the bolt holes?, And how big is diameter on short side?

The bolt holes are 3 1/8” Center to Center. The diameter of the two bolt holes are approximately 1/2”. They are about 5/16” from the edge of the flange. I hope this helps you. Mike

My boiler has 1" input/output. Is there a 1" flange set?

Yes, please see the following. Grundfos 519602 1-Inch GF 15/26 Cast Iron Flange Set … ASIN: B0012QIZNU

grundfos ups 26-99fc will this set work on this pump?

3/4" GF 15/16 FLANGE SET, BRONZE, THREADED, PAIR, GRUNDFOS, Use with UP15-18SF, UP15-42SF, UP25-64SF, UP26-96BF, UP26-99BF YES

519601 Cast Iron Flange Set For Up Series Circulator Pumps

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

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75467CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Upgrade your pump game with the ultimate flange set—durability meets precision!

THREADED NPT CONNECTION - Secure 3/4-inch pipe fitting ensures reliable, vibration-resistant sealing
TRUSTED BY PROFESSIONALS - Highly rated with 4.6 stars from 373 reviews, a go-to choice for expert pump maintenance
COMPLETE INSTALLATION KIT - Includes all essential components—flanges, gaskets, bolts, and nuts—for hassle-free setup
ENGINEERED FOR PRECISION FIT - Seamlessly pairs with Grundfos UP & UPS pumps for leak-proof performance
ROBUST CAST IRON CONSTRUCTION - Built to last with industrial-grade durability that withstands demanding environments

The Grundfos 519601 Cast Iron Flange Set is a premium accessory designed for UP Series Circulator Pumps, featuring a durable cast iron construction, secure 3/4-inch NPT threaded connections, and a complete kit including flanges, gaskets, bolts, and nuts. Trusted by professionals for its perfect fit and leak-proof reliability, it ensures seamless pump integration and long-lasting performance.

Specifications

ASIN	B0012QGVRC
Brand	Grundfos
Color	Black
Colour	Black
Customer Reviews	4.6 out of 5 stars 373 Reviews
Fastener Type	bolts
Fastener type	bolts
Finish Types	Black
Global Trade Identification Number	00632514009769
Included Components	Grundfos 519601 Cast Iron Flange Set for UP Series Circulator Pumps - 3/4" NPT
Item Diameter	0.75 Inches
Item Dimensions	5.1 x 5.1 x 5.1 centimeters
Item Shape	Round
Item Type Name	Grundfos 519601 Cast Iron Flange Set for UP Series Circulator Pumps - 3/4" NPT
Item Weight	0.01 Ounces
Item dimensions L x W x H	5.1 x 5.1 x 5.1 centimeters
Manufacturer	Grundfos
Material	Cast Iron
Material Type	Cast Iron
Model	519601
Number Of Items	1
Number of Pieces	6
Part Number	519601
Screw Head Style	Hex
Set Name	Flanges Set
Size	347
Size Name	347
UPC	783961374501 632514009769
Unit Count	1 Count

Reviews

L**O

Todo perfecto.

Todo bien con el producto, queremos compras mas artículos como este, en total de 102 artículos. Me pueden dar un mejor precio? Gracias

21.08.2023

L**E

Perfect for their use case!

They do their job perfectly! The quality of the product is top of the line. I'm using it to pair it with my Grundfos water pump and it fit perfectly and hasn't leaked at all. You can tell this product is going to last.

21.06.2017

S**I

is what it says-quality is fine

wrong size 4 me

1.06.2024

S**M

correct part and fit perfect

great quality. would purchase again

27.12.2023

C**I

nice one it works

very good product, totally happy for it

8.01.2019

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75467CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.