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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Description

🚽 Upgrade your flush game with the ultimate fill valve power move!

CUSTOM FLUSH CONTROL - Dual dials let you fine-tune water levels for optimal efficiency and savings.
UNIVERSAL COMPATIBILITY - Fits the majority of toilet models for hassle-free upgrades.
EZ TWIST HEIGHT ADJUSTMENT - Easily adapts from 9 to 14 inches to fit your tank perfectly.
7 YEAR MANUFACTURER WARRANTY - Built to last with trusted durability and peace of mind.
QUIETEST MOST POWERFUL VALVE - Say goodbye to noisy, slow fills with industry-leading performance.

The Fluidmaster 400H-002 Performax is a high-performance, universal toilet fill valve designed for quiet operation and efficient water control. Featuring adjustable tank and bowl water levels, EZ-Twist height adjustment from 9 to 14 inches, and compatibility with most toilet models, it ensures a perfect fit and optimal flush every time. Backed by a 7-year warranty, it’s the smart, durable choice for modern bathrooms.

Specifications

Material	Plastic, Rubber
Brand	Fluidmaster
Item dimensions L x W x H	3.35 x 4.33 x 13.19 inches
Exterior Finish	Black
Inlet Connection Size	0.75 Inches
Inlet Connection Type	Fill
Outlet Connection Type	Compression
Number of Ports	2
Outlet Connection Size	0.75 Inches
Specification Met	code approved, anti-siphon design and water saving bowl water level adjustment
Valve Type	Toilet Fill Valve
Manufacturer	Fluidmaster
UPC	300716763504 039961025913 300719040572
Part Number	400H-002-P10
Item Weight	9.6 ounces
Product Dimensions	3.35 x 4.33 x 13.19 inches
Item model number	400H-002-P10
Size	1- Pack
Color	Multicolor
Style	1-Pack
Pattern	Control
Shape	shape
Item Package Quantity	1
Usage	Professional
Included Components	Toilet Fill Valve and Parts
Batteries Included?	No
Batteries Required?	No
Warranty Description	7 year manufacturer