Ullnosoo

Ullnosoo 3-Inch Gerber 99-788 Toilet Flapper Replacement – 4 Pack, Leak-Proof & Water-Saving

High-performance tools and home improvement made for confident daily results

$26.28

3 shoppers currently have this item in cart.

Low stock: only 5 left in inventory. Add to cart before it's gone.

Shop Pay installment options may appear at checkout where eligible.

Free shipping Secure checkout 100% refund eligible
Bundle & save Buy 2 and save checkout time

Premium tools and home improvement quality selected for United States (USA) customers.

Routine pack Build your routine pack (3)

Fast dispatch with always-free shipping and secure checkout on every order.

Free shipping

i

Free shipping on every order. Fast dispatch, tracked delivery, and secure checkout included.

Easy returns

i

Simple return flow and responsive support for eligible items.

Peak-demand shipping delays

i

During high demand, deliveries may experience short carrier delays. Tracking updates remain active for every order.

24/7 customer support

Questions before checkout? Our team is available and ready to help.

Share

Why customers choose TaskHolt Tools

Upgrade Your Gerber 99-788 Toilet with a 3-Inch Ullnosoo Flapper

If you’re replacing a worn 3-inch flapper on a Gerber 99-788 tank, the Ullnosoo replacement offers a precise fit designed for reliable sealing and efficient flushing. This 4-pack delivers consistent performance across multiple uses, making it a practical choice for households aiming to refresh several toilets or to keep a spare ready for next time.

Key Benefits

  • Perfect fit for 3-inch valves and Gerber 99-788 toilets, ensuring a snug seal that promotes smooth operation.
  • Water-saving and leak-proof design helps minimize waste and supports steady, efficient flushes over time.
  • Durable construction uses chlorine-resistant rubber for longevity in hard water, paired with a rustproof stainless steel chain that resists corrosion.
  • Tool-free installation with included chain and hooks allows a quick, hassle-free replacement, even for DIY newcomers.

Durability and Real-World Use

The combination of a resilient rubber seal and a robust stainless steel chain is built to withstand regular opening and closing cycles. In everyday use, this design aims to maintain a dependable flush and to help curb running toilets that waste water.

What’s Included and Compatibility

  • Four 3-inch flappers per pack
  • Stainless steel chain and installation hooks

Note: Compatible strictly with 3-inch flush valves. Not suitable for 2-inch valves, Kohler, or Mansfield models. If your tank uses a 3-inch valve and Gerber 99-788, this replacement aligns with your setup.

FAQ

Q: What toilets is this Ullnosoo replacement compatible with?

A: Fits 3-inch flush valves and Gerber 99-788, not compatible with 2-inch valves or Kohler/Mansfield models.

Q: What is included in the 4-pack?

A: Four 3-inch flappers with stainless steel chains and hooks for quick, tool-free installation.