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Eastgate Supply
Backflow Enclosures - Master Table
Match your backflow device's dimensions to the right enclosure. Use the master table to compare interior clearances across every model and find the cover that fits your assembly.
🔍 Backflow Enclosure Size Finder
Enter the inside dimensions you need and we'll show you matching enclosures.
What inside dimensions do you need?
Enter the minimum interior length, width, and height required for your enclosure (in inches).
longest side needed
front-to-back needed
floor to top needed
Matching Enclosures
How to Size a Backflow Enclosure
Start by measuring the full installed assembly — including the backflow preventer, shutoff valves, test cocks, strainers, and any unions. That total measurement is your minimum inside clearance need. Then add at least 6 inches on each dimension so technicians can reach test cocks and perform annual testing without having to remove the enclosure.
All enclosures ship free.