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-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, 1-Pack, Multicolor

Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, 1-Pack, Multicolor

Product ID: 404619817

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Details

Brand
Fluidmaster
Item dimensions L x W x H
8.5 x 11 x
Exterior Finish
Chrome
Inlet Connection Type
Compression
Number of Ports
2
Manufacturer
Fluidmaster

Specifications

Brand	Fluidmaster
Item dimensions L x W x H	8.5 x 11 x 33.5 Centimeters
Exterior Finish	Chrome
Inlet Connection Type	Compression
Number of Ports	2
Manufacturer	Fluidmaster
UPC	300716763504 039961025913 300719040572
Country of Origin	USA
Item model number	400H-002-P10
Product Dimensions	8.51 x 11 x 33.5 cm; 272.16 g
ASIN	B07N7BH94Q

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