Fluidmaster 400A Brass Shank Universal Toilet Fill Valve Review

Our Review Approach

In this review, we evaluate the Fluidmaster 400A Brass Shank Universal Toilet Fill Valve as a toilet flush valves decision for readers of Big Home Improvements. The goal is practical: separate usable hub specs from packaging language so you can decide quickly.

Our Summary

The Fluidmaster 400A is for homeowners who need a replacement universal toilet fill valve with a brass shank.

The valve has an easy-turn dial for setting the tank water level and a pre-installed shank washer to save time. The listing says it is a universal fill valve, and it has a brass shank. The size is about 2.95 by 2.95 by 12.55 inches and the weight is about 0.77 pounds. The warranty is a 7-year limited warranty. The model is 400A-019-P4 and the color is black.

The listing gives few details. It does not say the height range, the supply line type or the water pressure range, so check the package. Turn off the water and flush the tank first, and check for leaks at the tank and supply nut after fitting. Do not overtighten plastic nuts. Universal does not always fit one-piece or pressure-assisted toilets, and the listing does not clarify. Set the water level below the overflow tube.

Who It Is For

This style of plumbing suits shoppers who already know they need toilet flush valves coverage and want a Fluidmaster option with transparent listing details.

It is a weaker match if you need a fully custom install, a different capacity class, or a feature the hub row simply does not list.

Trade-Offs and Limits

Trade-offs are normal in toilet flush valves. A design that wins on portability may give up enclosed storage; a long wireless claim may assume open line-of-sight; a high load rating usually assumes even distribution.

Our Storage Pick badge is editorial shorthand for “worth considering in this category,” not a guarantee for every floor plan, campsite, or property layout.

How It Compares

Against generic no-name alternatives, Fluidmaster listings often win on clearer packaging and easier returns through Amazon — still read the live seller and fulfillment line.

Against premium ecosystems, this unit may look simpler. That can be a feature if you want fewer apps and more straightforward hardware.

Who Should Buy It

Buy the Fluidmaster 400A Brass Shank Universal Toilet Fill Valve if the hub numbers and feature set line up with your toilet flush valves job. Skip it if you need a capability the listing does not document.

Use the Amazon button on this page to check the current price, stock and seller details before you buy.

Our content is researched and drafted with AI assistance and reviewed by our team. Product details come from published specs, manufacturer information and owner reviews.