Can someone who has never replaced one of these do it or should I hire a plummer??

I'd say, if you are patient and have a second bathroom to use so you won't be pressured, you can do this. The replacement product is universal, and made from materials which are easy to work with and don't rust. If anything, I'd look at the existing components to make sure they are not corroded or rusted, which makes it very difficult to remove the old components from the tank. Particularly the bolts which hold the tank to the base. Check those. If they are clean on the bottom of the tank under the base, and you can easily turn them with a wrench while holding the screws with a screwdriver in the tank, you should be good to go.

What's the difference between the fluidmaster 400arhrkp10 and 400akrp10?

Thank you for your question. The difference between the kits are the fill valves. The ARHRKP10 comes with a high performance fill valve which is designed to fill the tank quieter while the toilet bowl is being filled up faster or with more water. This feature is very important on the new dual flush or low gallon per flush toilets where more water is needed to fill the bowl. The AKRP10 comes with our standard fill valve and it is designed with a standard refill rate (water going to the bowl) that works best with larger gallon per flush toilets or toilet that are not designated as High Efficiency Toilets (HET). For additional questions on this Fluidmaster product contact us at your earliest convenience. Fluidmaster’s Technical Service Department is available Monday through Friday from 5:30 AM through 5:00 PM Pacific Standard Time. Contact options include: Chat www.fluidmaster.com/support E-Mail techsupport@fluidmaster.com and Toll Free 800-631-2011.

When selecting size, four options are offered - .1 pack, .#new version (1pack), .new version 1 pack and 1 pack - what is difference of these options?

I am not a plumber but have done toilet repair. The Fluidmaster web site will fully explain their different models. Size considerations for the correct kit are the flapper at 2”, 3” or even 4”. Most all their models adjust in height from 9” to as tall as 15”. Much depends on the age and model of your toilet, along with your desired gallons per flush and water levels.

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🚀 Flush smarter, not harder — upgrade your throne today!

WATER SMART FLAPPER - Adjustable 2-inch flapper eliminates ghost flushes, maximizing every drop saved.
DIY FRIENDLY INSTALLATION - Get your toilet running like new in under 10 minutes—no plumber needed.
TURBOCHARGED REFILL VALVE - PerforMAX fill valve delivers 2X faster refill for rapid, efficient flushing.
ALL IN ONE PERFORMANCE BOOST - Replace fill valves, flappers, and handles with one kit for seamless toilet renewal.
UNIVERSAL FIT ULTIMATE UPGRADE - Fits 10-15 inch toilets, perfect for high-efficiency 1.28-1.6 GPF models.

The Fluidmaster 400ARHRKP10 PerforMAX All-In-One Toilet Repair Kit is a WaterSense certified, universal-fit solution designed to replace inefficient fill and flush valves, leaky flappers, and broken handles. Featuring a 2X faster refill valve and an adjustable water-saving flapper, it ensures high-performance flushing for 1.28 to 1.6 GPF toilets. Easy to install in under 10 minutes, this kit revitalizes your toilet’s efficiency and reliability with premium, durable plastic components.

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Material	Plastic
Brand	Fluidmaster
Item dimensions L x W x H	11.5 x 19.5 x 35 Centimeters
Exterior Finish	Plastic
Inlet Connection Size	2 Inches
Inlet Connection Type	Barb
Outlet Connection Type	Barb
Number of Ports	2
Outlet Connection Size	2 Inches
Specification Met	WaterSense
Global Trade Identification Number	00039961014771
Manufacturer	Fluidmaster
UPC	039961014771
Item model number	400ARHRKP10
Product Dimensions	11.48 x 19.48 x 34.98 cm; 299.37 g
ASIN	B01E1E1K1S

Fluidmaster 400ARHRKP10 PerforMAX All-In-One Toilet Repair Kit

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