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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🚽 Flush smarter, save water, and upgrade effortlessly!

LEAK PROOF SEAL - Thickened rubber ring delivers a drip-free, reliable flush every time.
DURABLE ABS BUILD - Crafted from premium materials for long-lasting performance and peace of mind.
ECO SMART DUAL FLUSH - Cut water bills with adjustable full or half flush options.
PRECISION FIT GUARANTEED - Designed for 2.56"-2.76" tank holes, ensuring seamless compatibility.
DIY FRIENDLY INSTALLATION - Get your toilet flushing like new in 10 minutes or less—no plumber needed.

This 2-inch toilet flush valve assembly is a universal, water-saving replacement part compatible with most one-piece toilets, including TOTO THU338N. Featuring a dual-flush design, thickened rubber sealing, and durable ABS construction, it ensures leak-free performance and easy installation in under 10 minutes, making it the perfect upgrade for eco-conscious homeowners.

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¥12129

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TrustScore 4.5 | 7,300+ reviews

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Fantastic experience overall. Will recommend to friends and family.

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Manufacturer	VALLVATER
Part Number	THU
Product Dimensions	20.32 x 7.62 x 20.32 cm; 380 g
Item model number	THU
Size	8 inch height
Style	fits for one-piece toilet
Material	Acrylonitrile Butadiene Styrene (ABS)
Item Package Quantity	1
Certification	RoHS, UL, WaterSense
Batteries included?	No
Batteries Required?	No
Item Weight	380 g

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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