will this replace a 400A on an american standard 4392?

Yes this will replace the 400A and flapper that is in that model of tank. For more information please contact Fluidmaster’s Technical Service Department, we are 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.

My new one leaks a little when you flush. Under the blue cap just a few drops than it stops leaking. Is this a normal release of water when flushed ?

I would have been thrilled if mine had only leaked a few drops. Mine sprayed water like a fire hose so I returned it.

Will this fit a Kohler 1.6 gallon toilet?

I see no reason why not, unless your tank is too low to put the tank lid or cover back on. check height of fill valve and tank depth

Does this work with the toilets that does not have handles.. we have the one where you have to push the button in the center top of the tank.. Thanks

The part you are buying is the tube that refills the tank after the flush has occurred. Whether the flush is because of a handle or a button on the top of the tank. this unit is is separate from that action. The flapper valve included may or may not work with your tank but the unit itself to fill the tank over and over will work just fine.

Fluidmaster K 400h 039 T14 Performax Fill Valve And 2

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

¥12406

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Description

🚽 Upgrade your flush game—quiet, efficient, and built to last!

TRUSTED LONGEVITY - Solid frame design backed by a 7-year warranty for peace of mind
DURABLE HYGIENIC - Corrosion-resistant flapper with Microban technology fights bacteria and hard water damage
PRECISION WATER CONTROL - Customize tank & bowl water levels for optimal flush and savings
WATER SAVING INNOVATION - Adjustable flapper dial reduces water use per flush without sacrificing performance
UNIVERSAL FIT EASY INSTALL - EZ-Twist height adjustment fits most 2-inch flush valve toilets in minutes

The Fluidmaster K-400H-039-T14 PerforMAX Fill Valve and 2-Inch Flapper Kit is a premium, universally compatible toilet repair solution designed for 2-inch flush valve toilets. Featuring adjustable height (10-15 inches), dual water level controls for tank and bowl, and a water-saving flapper with Microban antimicrobial protection, it ensures a quiet, efficient flush while reducing water consumption. Easy to install with a solid frame and backed by a 7-year warranty, this kit revitalizes your toilet’s performance and longevity.

Reviews

User

Would buy again

Fit and work great ...easy set up ..I got two serval mith ago and still working great .

24.04.2026

User

Easy install, good manual, good value for a combo pack.

Good value for combo kit - at present I only needed the valve, but past history says I'll need the flapper some day. Quiet flushing, easy to install if you make sure to turn off the water and flush once to empty the tank. Have a small bucket and a towel ready. Has all the adjustments for a "normal" household toilet, and the manual is well written and easy to follow.

14.07.2026

User

Reemplazo perfecto para WC

Muy buen producto, fácil de instalar, y muy silencioso trabajando.Todo está en el paquete para hacer una buena instalación. Material impecable.

23.01.2026

User

Bem satisfeito

Muito bom

1.07.2025

User

No other quality product

Fluidmaster quality product for years every toilet i have replaced with fluidmaster

7.08.2026

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

View all Trustpilot reviews

¥12406

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

View all Trustpilot reviews

Asin	B09NYLJ1FZ
Date First Available	1 April 2022
Item Model Number	K-400H-039-T14
Manufacturer	Fluidmaster
Product Dimensions	8.99 x 16 x 6.05 cm; 385.55 g

Fluidmaster K-400H-039-T14 PerforMAX Fill Valve and 2-Inch Flapper Toilet Repair Kit, Multicolor

Details

Details

Description

Specifications

Reviews

Common Questions