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Anti-siphon valve protects fresh-water hose and supply from contamination when flushing your black tank. Replaces valve on the Valterra HydroFlush F02-4110, F02-4100, and Valterra Flush King F02-4350.
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Fits:
California residents: click here
I use this anti syphon valve all the time for backflushing my black tank in my fifth wheel. Just buying a new one to replace old one. I've use E trailer for years for other purchases and your customer service is second to none and I appreciate That and you have professionals that are very knowledgeable and helpful about your Products you sell and I appreciate that.
etrailer service is excellent. These back flow restrictors were received quickly. The are just the product I was looking for. Connects to both ends of a standard water hose. 5 Stars.
I plan to use the anti-siphon valve as the inlet to the black-water take flushing system for my Open Range Jouneyer at the inlet to the factory installed anti-siphon valve when using a potable water supply for flushing.
Works like a charm. Used to avoid any reverse backflow when using the black holding tank rise hose connection.
Seems to work OK.

Tj
7/2/2019
It works as designed.
It does the job
Works as described.
It looks exactly like my original Part.
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Herb
2/11/2019
Backflow restrictors works perfectly. I dont even know it is there on the hose.