Description
PERKO “Flushpro”Valve 1” – 456-DP6.
Product Description
Finally! Freshwater Flushing of Your Inboard is as Simple as Connecting a Garden Hose!
Flush Pro™ valves offer one of the easiest to use flushing systems available for inboard engines. Simply unscrew the Flush Pro™ cap, connect a standard garden hose, turn on the water and start your engine. The Flush Pro™ valve automatically pulls fresh water into the boat’s cooling system – even if the boat is in the water – flushing out the entire cooling system with fresh water. When done, shut off the engine, turn off & disconnect the hose and replace the Flush Pro™ cap. Your engine is flushed.
Flush Pro™ also makes winterizing easy. Simply close your seacock after the system is drained, take off the Flush Pro™ cap & drop the 5/8″ winterizing fitting into the Flush Pro™ valve. Insert one end of a 5/8″ tube into the fitting and the other end into your antifreeze. Start your engine & run until the proper amount of antifreeze is sucked into the engine. Remove the winterizing fitting, replace the cap on the Flush Pro™ valve & you’re ready for below freezing temperatures.
Like all Perko products, Flush Pro™ valves are made in the USA.
Flush Pro™ Operation Illustration

Ordering Information
| Include | For Hose Size Inches | Dealer Pkg. 1 Pc. | OEM Bulk Pkg. 5 Pcs. | Ship Wt. Carton Lbs. DP/OEM Bulk Pkg. |
|---|---|---|---|---|
| Valve | 5/8 | 0456DP4 | 0456004 | 1.3/3.5 |
| Valve | 1 | 0456DP6 | 0456006 | 1.4/3.6 |
| Valve | 1-1/4 | 0456DP7 | 0456007 | 1.5/3.7 |
| Valve & Kit | 5/8 | 0457DP4 | 0457004 | 2.9/11.5 |
| Valve & Kit | 1 | 0457DP6 | 0457006 | 3.0/11.6 |
| Valve & Kit | 1-1/4 | 0457DP7 | 0457007 | 3.1/11.7 |
This is a special order item. Most special order items are shipped within 72 hours of ordering, however, some items are not in stock. We will let you know if the item is not available. Alternatively, you may call us at 1-866-473-0420.







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