Does the k1078578 replace the 84679-aa flush valve assembly?

Suggest you ask Kohler directly.

what is diameter of connection holes in kohler k1078578 flush valve?

Don't know but genuine Kohler part should work.

8.5 x 10.35 x 4.95 inches exact measurements

What is the difference between this and 84996 ? Also, says "constructed of brass"???

The 1078578 and 84996 are the same- the 1078578 is the current part number. Either one is fine...the 84996 has probably been sitting around awhile but that is the only difference.

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Kohler K1078578 Flush Valve Assembly Kit

Product ID: 266654050

Details

Brand
Kohler
Exterior finish
Brass
Inlet connection size
10.35 Inches
Item dimensions L x W x H
21.6 x 26.3 x
Material
Brass

⚙️Compression & sweat outlet connections

🛠️Brass construction for durability

🇺🇸Made in USA for trusted quality

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€ 83.49

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🚽 Upgrade your flush game with KOHLER’s precision-engineered valve kit!

PREMIUM BRASS BUILD - Corrosion-resistant brass construction built to last and impress
TOP RATED RELIABILITY - 4.6-star rating from 675+ users who upgraded to genuine KOHLER parts
QUICK SECURE INSTALLATION - Compression and sweat connections designed for a reliable, leak-free seal
TRUSTED AMERICAN CRAFTSMANSHIP - Proudly made in the USA, meeting rigorous ANSI and ASME standards
ENGINEERED FOR PEAK PERFORMANCE - KOHLER genuine parts ensure flawless fit and function every time

The Kohler K1078578 Flush Valve Assembly Kit is a premium, brass-constructed plumbing component designed for reliable, long-lasting toilet flush performance. Featuring compression and sweat outlet connections, it ensures a secure fit and leak-free operation. Made in the USA and engineered to meet strict ANSI and ASME standards, this genuine KOHLER part is highly rated by professionals and DIYers alike for its durability and ease of installation.

Specifications

ASIN	B003H49MLY
Best Sellers Rank	#64,123 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #116 in Toilet Flush Valves
Brand	Kohler
Brand Name	Kohler
Connector Type	Compression, Welding
Customer Reviews	4.6 out of 5 stars 674 Reviews
Exterior Finish	Brass
Exterior finish	Brass
Global Trade Identification Number	00650531581600
Included Components	FLUSH VALVE ASSEMBLY KIT
Inlet Connection Size	10.35 Inches
Inlet Connection Type	Compression
Inlet connection size	10.35 Inches
Inlet connection type	Compression
Item Dimensions	21.6 x 26.3 x 12.6 centimeters
Item Type Name	Flush Valve Assembly Kit
Item Weight	6.7 Ounces
Item dimensions L x W x H	21.6 x 26.3 x 12.6 centimeters
Manufacturer	Kohler
Manufacturer Part Number	471147
Material	Brass
Material Type	Brass
Model Number	471147
Number of Ports	2
Outlet Connection Size	0.75 Inches
Outlet Connection Type	Sweat
Size	0.75 x 3.25 x 10.00 inches
Specification Met	ANSI B16.11, ASME B16.34, CSA, NSF, ULC
UPC	650531581600
Unit Count	1.0 Count
Valve Type	Globe Valve

Reviews

N**A

It took a total of 2 minutes to install

1.03.2026

S**E

Tight fit

18.11.2024

A**Z

Excelente Servicio

Todo bien, le quedó perfecto

14.04.2025

M**I

Excellent

27.02.2025

E**O

cumplío con las expectativas

muy bueno

8.11.2022

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