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The MainGuard model #78 Blow-Off installs underground in a standard meter box. Designed and engineered specifically for flushing, the #78 provides excellent flow rates (see flow rate chart in specifications tab) for improving chlorine residual levels and flushing by-products to keep water “fresh”. Its unique valve design allows for a full “clear-channel” flow that is superior to other blowoffs for moving water and passing debris easily. The #78 plunger is also designed to allow for throttling water flow while at the same time covering the drain hole to avoid unnecessary erosion.
The MainGuard model #78 comes standard with all brass and aluminum working parts, nozzle sizes 2 ½” NST or smaller, traffic break-away, self draining non-freezing drain, 2” FIP vertical (straight) inlet, locking security cover (see options tab for more information), and low-lead option available. And, as with all Kupferle products, the MainGuard model #78 is fully serviceable from above ground – no digging!
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• Can accommodate any depth of bury
• 90° horizontal (side) inlet
• 2” MJ inlet iron w/ epoxy coat
• 2” MJ inlet all brass valve
• Galvanized exterior casing pipe
• Low-lead option
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- #78 operating wrench – long handle Part #85LHW (24")
- #78 operating wrench - short handle Part #85SHW (6")
Call 1-800-231-3990
7:30am - 4:00pm Central Time
Monday - Friday
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