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Vetus air vents prevent sea water from siphoning back through the exhaust into marine engines. Also called a vented loop, it is used as a siphon break for marine toilets and holding tanks. This siphon break is critical for engines utilizing a wet exhaust system. Vent mounts in the coolant line before the mixing elbow with the exhaust gas. Ideal installation is 16 inches above the water line.
Two types are available. AIRVENTH comes with 12 feet of hose to connect the vent to the outside of the hull. When the engine is running a constant bleed of cooling water trickles out. Along with the 12 feet of hose comes a skin fitting and hose clamps.
AIRVENTV model has a pressure valve and is self contained. It does require periodic maintenance to prevent clogging with salt crystals.
$71.78
$71.78
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BRAND:
Vetus
Type:
Air Vents
Questions & Answers about Vetus Air Vents for Exhaust Systems:
2012-11-15A shopper asked: With my generator running, I have constant water coming out of the vent tube. Does this mean the siphon break is clogged?
+Expand Answers
2012-11-16Nathan Fournier: Good morning, OK if you have the "VET-AIRVENT'H'" then that is perfectly normal for the water to constantly come out and I prefer that model, because it easily let's you know that everything is working without having to check (simpler and better design), but obviously you need a thru-hull set-up for this one. However, if you have the "VET-AIRVENT'V'" set-up then yes this is an issue because your check/joker valve is not working properly, and you will need the replacement "VET-ASDVS" kit. If you're looking to replace the "V" model altogether you should use the updated version "VET-ASDV" model, but I definitely recommend the 'H' model. We sell all of these products, and if you have any other question please feel free to call or email me at anytime, thank you.
Nathan
JD Store
(401)253-3840 ex130
store@jamestowndistributors.com
2012-08-06LEE PEARCE asked: I'm getting a lot of liquid (salt water) from the air vent on my vetus anti siphon with drian hose. I will do the maintenance and check for salt build up, but wonder if I should replace the spring located at the top, in the valve?
2012-01-13STUART CAIRNIE asked: The Vetus airventh with the 12 ft hose does it need to be a downhill run from the vent itself all the way to the drain in the hull or can it have a dip to the bilge then up to the drain in the hull as I was thinking of "T"ing it to the drain in the sink head?
Cheers
Stuart
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2012-02-09RONALD DWELLE: I don't know. We are using the air vent without the hose. So far it works very well. Not sure why the exhaust hose would be desirable.
Ron
Comments about Vetus Air Vents for Exhaust Systems:
I have rebuilt "conventional" anti siphon valves to direct the small amount of salt water that they blow during operation. Since these anti-siphon valves must be mounted high, this "spitting" eventually corrodes something below them. I've never understood why valve makers haven't made this design a standard. I'm told this valve also seems not to require as much servcing as most. Time will tell. . .
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Special order items are not stocked and are ordered direct from the manufacturer. They are non-returnable, may take 2-4 weeks, price and shipping charges subject to change.
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