Sloan Royal Diaphragm Assembly 3.5 GPF for Royal Flushometers vs Replacement flush valve cartridge kit for Flushmate 503H

Overall winner: Sloan Royal Diaphragm Assembly 3.5 GPF for Royal Flushometers

Sloan Royal Diaphragm Assembly 3.5 GPF for Royal Flushometers

Sloan Royal Diaphragm Assembly 3.5 GPF for Royal Flushometers

Sloan • ★ 3.7/5 • Mid-Range

Diaphragm assembly kit with PERMEX synthetic rubber and dual-filtered bypass for Royal Flushometers. Designed to replace worn diaphragms and optimize flush accuracy. Customer notes good quality, perfect fit, and value

Pros

  • PERMEX synthetic rubber diaphragm
  • Dual-filtered fixed bypass
  • Designed for Royal Flushometer compatibility
  • Helps maintain correct flushing amounts

Cons

  • Compatibility limited to Royal line
  • 3.5 gpf option may require check for specific model
  • No explicit installation guidance provided
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Replacement flush valve cartridge kit for Flushmate 503H

Replacement flush valve cartridge kit for Flushmate 503H

Duravit • ★ 3.9/5 • Mid-Range

Replacement flush valve cartridge kit designed for Flushmate systems, delivering regulated water flow for consistent performance. Includes duckbill valve, filter screen & lower supply filter for easy maintenance. Customers note ease of installation and clear instructions

Pros

  • regulated water flow for consistent flush
  • includes duckbill valve, filter screen & lower supply filter
  • easy installation with clear instructions
  • durable corrosion-resistant materials

Cons

  • mixed durability and leak-prevention feedback
  • some failures reported after months of use
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Head-to-Head

CriteriaWinner
Price Tie
Durability Sloan
Versatility Duravit
User Reviews Duravit