What is the difference between the 400H and 400AH?

The 400H is the newer version of the 400AH. The bowl water adjustment on the 400H is integrated into a knob in at the top of the flush valve. On the 400AH, a roller on the refill tube adjusts the bowl water level.

Can i use this to replace a delta toilet fill valvepart RP71188?

The 400H-002 will replace the Delta model. The 400H can adjust to the same height and comes with an adjustable bowl refill knob to control the amount of water going to bowl. With this adjustment you should be able to match both bowl and tank water levels to the original levels. 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.

Will this work to replace my 300 model on gerber 28-990 1.6gpf?

Yes it will. For any other question feel free to contact Fluidmaster via Chat and E-mail on Fluidmaster com or call our toll free number 800-631-2011 for immediate help. We are available from 5:30 AM to 5:00 PM Pacific Standard Time.

Are these universal or can I replace this on my top flush toilet?

This fill valve is a universal part that will replace most fill valves in use today, including toilets that use a top button to flush. For more information visit our website Fluidmaster.com/support for videos, troubleshooting tips, email, chat with a technician or call toll free 800-631-2011. We are available 5 days a week Mon-Fri from 5:30 am – 5:00 pm PST.

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Fluidmaster 400H Universal Toilet Fill Valve, High Performance, 2-Pack

Product ID: 514123406

Details

Brand
Fluidmaster
Exterior Finish
Blue
Global Trade Identification Number
Inlet Connection Size
3.38 Inches
Inlet Connection Type
Threaded
Item dimensions L x W x H
36.2 x 8.6 x

⚡2X faster refill rate

🔇Ultra-quiet operation

🔧EZ-twist height adjustment 9-14 in.

RM653

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Description

🚽 Upgrade your throne with speed, silence, and style!

COMPLETE REPLACEMENT KIT - Includes valve, washer, locknut, tube, and clip for a seamless upgrade.
WATER SMART CUSTOMIZATION - Adjust tank and bowl water levels to save water without sacrificing performance.
WHISPER QUIET PERFORMANCE - Ultra-quiet operation means no more noisy bathroom interruptions.
DOUBLE THE SPEED HALF THE WAIT - Experience 2X faster bowl refill for ultimate efficiency.
TAILORED FIT EFFORTLESS INSTALL - EZ-twist shank height adjustment fits most tanks from 9 to 14 inches.

The Fluidmaster 400H Universal Toilet Fill Valve 2-Pack delivers industry-leading 2X faster refill speeds with ultra-quiet operation. Designed for easy installation with EZ-twist height adjustment (9-14 in.), it fits most toilet brands and models, including 1.28 HET and 1.6 GPF toilets. Featuring adjustable water levels for optimized water savings and a complete replacement kit, this high-performance valve is EPA and WaterSense certified, ensuring efficient, reliable, and eco-friendly bathroom upgrades.

Specifications

ASIN	B09PCXSQJM
Brand Name	Fluidmaster
Connector Type	Threaded
Country of Publication	USA
Customer Reviews	4.6 4.6 out of 5 stars (1,300)
Exterior Finish	Blue
Global Trade Identification Number	00039961033437
Included Components	Toilet Fill Valves
Inlet Connection Size	3.38 Inches
Inlet Connection Type	Threaded
Item Dimensions	36.2 x 8.6 x 17.5 Centimeters
Item Highlight	2X faster bowl refill, Quiet operation, Adjustable tank and bowl water levels, EZ-Twist 9–14 in. height
Item Type Name	High Performance Tank and Bowl Water Control
Item Weight	1.4 Pounds
Manufacturer	Fluidmaster
Manufacturer Part Number	400H-5003
Material Type	Plastic
Model Number	400H-5003
Number of Items	2
Number of Pieces	2
Outlet Connection Size	3.38 Inches
Outlet Connection Type	Flange
Size	2- Pack
Specification Met	EPA, NSF, UPC, WaterSense
Thread Size	1/4 inch
UPC	039961033437
Unit Count	2.0 Count
Valve Type	Toilet Fill Valve

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TrustScore 4.5 | 7,300+ reviews

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RM653

Duties & taxes included

In stock

Sold byAmazon MalaysiaDelivered 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 Malaysia.

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TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

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