TLDR Review: Fluidmaster 400H Fill Valve
Verdict
The Fluidmaster PerforMAX High Performance Fill Valve 400H-002-P10 is praised for its ease of installation and compatibility with various toilet models, making it a convenient option for those familiar with Fluidmaster products. However, the inconsistent performance, noisy operation, and confusing installation instructions could be off-putting for some users, particularly those new to plumbing repairs. Shoppers may wish to consider older Fluidmaster models for quieter operation and potentially better performance.
- Top pro:
- Installation is reportedly easy and straightforward, taking about 30 minutes for a DIY enthusiast.
- Top con:
- The fill valve is considered noisy and slow, contradicting its marketing as high performance.
Pros
- •Installation is reportedly easy and straightforward, taking about 30 minutes for a DIY enthusiast.
- •Compatible with Kohler Highline Arc models and works well with previously used Fluidmaster valves.
- •Offers adjustable valves for both tank and bowl water levels, enhancing flush performance.
- •Users with a history of Fluidmaster products appreciate their innovation and product evolution.
- •Some users find it a satisfactory and recommended upgrade, solving previous flushing issues effectively.
Cons
- •The fill valve is considered noisy and slow, contradicting its marketing as high performance.
- •Installation instructions are unclear and confusing, particularly for users without plumbing experience.
- •Some users experienced significant water spraying issues during testing, needing additional adjustments.
- •The quality of materials is perceived as cheaper and flimsier compared to older models.
- •Some experienced frustration due to installation difficulties and poor performance, resulting in returns.
We may earn a commission when you buy through these links, at no extra cost to you. How ShopSavvy makes money
How we researched this
About this review: it summarizes the professional reviews and customer ratings ShopSavvy collected for this product, alongside prices from 1 retailer in ShopSavvy's price data, most recently seen Oct 11, 2026.
Download ShopSavvy App
Compare prices across tens of thousands of stores, set price alerts, watch for deals by keyword, and much more.
Install ShopSavvy Browser Extension
Compare and track prices automatically while you shop online at thousands of websites.
