Description
Product Overview
The Fluidmaster 703AP4 fill valve is engineered from durable plastic to provide consistent water flow for Glacier Bay and Niagara flapperless toilets. Measuring 2.38 x 2.38 x 8.38 inches, it features 0.75‑inch barb connections for both inlet and outlet, ensuring a secure fit with standard plumbing. This valve restores the original refill speed, reduces cycle time, and eliminates the sluggish performance often caused by worn‑out components. Its compact design fits easily inside the tank, and the included installation guide simplifies the replacement process for DIY enthusiasts.
Usage
Designed for residential bathrooms, this fill valve is ideal for homeowners looking to upgrade or repair their toilet’s flushing system. It works perfectly in standard 1‑piece and 2‑piece toilet tanks, handling everyday use in family homes, guest bathrooms, and rental properties. The valve’s plastic construction resists corrosion and mineral buildup, making it suitable for areas with hard water. 
Why Choose Us
Fluidmaster is a trusted name in plumbing, known for rigorous testing and long‑lasting performance. This valve meets OEM specifications, guaranteeing a seamless fit without the need for additional adapters. Each unit undergoes quality inspection and comes with a warranty, giving you confidence in its reliability. By choosing this replacement, you avoid costly professional service and enjoy a quick, effective fix that matches the original factory standards.
Key Features
- Direct replacement for Glacier Bay and Niagara flapperless toilets
- 0.75‑inch barb connections for easy installation
- Durable plastic construction resists corrosion and wear
- Restores original refill speed and improves water efficiency
- Includes clear, step‑by‑step installation instructions
FAQ
Is this valve compatible with all Glacier Bay models?
Yes, the 703AP4 is designed to fit all standard Glacier Bay flapperless toilet models that use a 0.75‑inch inlet and outlet connection.
Do I need any tools to install the valve?
Only basic hand tools such as a wrench and screwdriver are required. The included instructions guide you through each step.
Can this valve be used with a water‑saving toilet?
Absolutely. The valve’s precise flow control works with low‑flow and high‑efficiency toilets, helping maintain water‑saving performance.
What warranty does Fluidmaster provide?
The valve comes with a limited warranty that covers manufacturing defects for one year from the date of purchase.
Will the plastic material affect durability?
Fluidmaster uses high‑grade plastic that is engineered to resist cracking and corrosion, ensuring long‑term reliability comparable to metal counterparts.




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