Sorry quick correction the valve number for my toilet is dv-f812v21 ?

Sorry, we can't see your original part, but if your toilet is one piece with top button,the tank height would be 10"-12.8",the tank hole in 2.56"-2.95". it can be used.

Will yhis item work on horow 8737?

Don't buy this component, because while it will work, you're not going to like the results. My toilet ran like a whisper before--then I used this replacement valve kit and the toilet works--REALLY LOUD. It wakes people up in the other room (the bathroom is connected to the master bedroom). Get a better version from someplace else like Lowes or Home Despot.

Will this work on my Costco WaterRidge-c22148c toilet?

No. This is not the correct piece.

How do you secure the valve to the screw

The top half of the flush valve twists off exposing the screw and metal piece that will hold the valve down. Loosen the screw allowing you to fit the bracket into the water drain and then tighten up the screw which will tighten up the flush valve. Then twist and lock the the rest back.

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🚽 Upgrade your flush game—save water, save time, save hassle!

DUAL FLUSH EFFICIENCY - Adjustable water-saving flush for eco-conscious performance and lower bills.
QUICK DIY INSTALLATION - Get your toilet flushing like new in under 10 minutes—no plumber required.
PRECISION FIT GUARANTEE - Designed for tank heights 10"-14" with silicone seal to prevent leaks.
UNIVERSAL 2 INCH COMPATIBILITY - Fits most one-piece toilets with a 2.56"-2.76" tank hole—no guesswork needed.
TRUSTED TOTO THU 338 REPLACEMENT - Seamlessly works with original parts for reliable, long-lasting repair.

The VALLVATER 2-inch Toilet Flush Valve Assembly is a precision-engineered replacement part compatible with most one-piece toilets, including TOTO THU338N models. Featuring a dual flush water-saving design and a silicone seal for leak prevention, it fits tank holes sized 2.56"-2.76" and tank heights between 10" and 14". Easy to install in under 10 minutes, this durable plastic valve ensures efficient, eco-friendly flushing and hassle-free maintenance.

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Material	Plastic
Brand	VALLVATER
Item dimensions L x W x H	8 x 3 x 8 inches
Exterior Finish	Silicone
Inlet Connection Size	2.56 Inches
Inlet Connection Type	Butt Weld
Outlet Connection Type	Butt Weld
Number of Ports	2
Outlet Connection Size	2 Inches
Specification Met	WRAS
Manufacturer	VALLVATER
UPC	725766901162
Part Number	THU
Item Weight	13.4 ounces
Product Dimensions	8 x 3 x 8 inches
Item model number	THU
Size	8 inch height
Style	fits for one-piece toilet
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

2-inch Toilet Flush Valves Assembly Compatible with Water Ridge One Piece Toilets Fits for TOTO THU338N Dual Flush Drain Valve Repair Part Replacement

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