Pentair System 3 Modular DE Elbow Assembly O-Ring (35505-7438Z) airsupply An overlay is useful because

An overlay is useful because it helps identify each control function clearly while restoring the finished appearance of the panel

Helps restore the main body of the multiport valve system

Replacing the full set together helps restore a more complete seal profile than changing only one visibly worn ring

Union-style valves are useful because they can make future service and replacement easier than more fixed plumbing arrangements

Pentair System 3 Modular DE Elbow Assembly O-Ring (35505-7438Z) airsupply An overlay is useful becauseRefresh a critical sealing point with this genuine Pentair Pool Products O ring, part 35505 7438Z. O rings are often the first parts to flatten, stretch, crack, or dry out, and replacing them can correct leaks that appear around valve bodies, filter fittings, drain ports, or pump assemblies. Use a pool safe lubricant where appropriate and confirm the part number against the exact Pentair model being serviced. A properly sized seal helps preserve