Nostrodamus
Well-Known Member
If it can save 9000 then 100 is not so bad to replace it what ever colour it is.
Anti-syphon valves cleaning tips
- Thread starter tudorsailor
- Start date
Tranona
Well-Known Member
Except that like many bits of kit, despite the odd horror story that makes good cheap magazine copy (and reminds us that we are all fallible) failure is extremely rare and easily avoided by following the manufacturers instructions on periodic cleaning.
It is one of those things that many people have no idea their boat is fitted with it and therefore completely ignore it. As you are clearly not in that category, nothing to worry about.
Personally a bit disappointed that the latest ones are grey. My old one was blue and clashed with the grey Yanmar. Changed to a blue Nanni, but the new valve is grey.
It is one of those things that many people have no idea their boat is fitted with it and therefore completely ignore it. As you are clearly not in that category, nothing to worry about.
Personally a bit disappointed that the latest ones are grey. My old one was blue and clashed with the grey Yanmar. Changed to a blue Nanni, but the new valve is grey.
cmedsailor
Well-Known Member
I am wondering if the annual flushing before winter lay up of the seawater system with fresh water and then anti rust/freeze can actually clean those valves. I did clean it in my boat (even though it looked OK) but I was concerned if that little spring can be damaged by opening/closing every year.
What do you think?
What do you think?
VicS
Well-Known Member
The little sprung valve opens every time you stop the engine to allow air to enter the loop.
I would not rely on the fresh water flush to keep it clear.
The advantage of the type that pees is that while it is peeing you know its not blocked. If it stops peeing then you investigate the reason why.
The downside will probably be the effect it has on you if its peeing where you can see it all the time.
tudorsailor
Well-Known Member
Answers to my own questions
I am now wiser about these anti-siphon valves having taken them apart.
The grey Vetus one is called Airventh. It has no moving parts and constantly pees water either through a skin fitting or in my case a shared drain. I opened it up and it is empty. There are no moving parts.
The other one with the yellow hat comes with the Onan generator. It is a little non return valve which I removed from the vertical tube. I could not see the flap valve but washed it out with fresh water and blew is through. The yellow cap allows air up and into the NRV as it is not a sealed fit
Hope this helps someone else
TudorSailor
I am now wiser about these anti-siphon valves having taken them apart.
The grey Vetus one is called Airventh. It has no moving parts and constantly pees water either through a skin fitting or in my case a shared drain. I opened it up and it is empty. There are no moving parts.
The other one with the yellow hat comes with the Onan generator. It is a little non return valve which I removed from the vertical tube. I could not see the flap valve but washed it out with fresh water and blew is through. The yellow cap allows air up and into the NRV as it is not a sealed fit
Hope this helps someone else
TudorSailor
VicS
Well-Known Member
This one
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tudorsailor
Well-Known Member
That is how it is. Once out, I could blow air in throught the clear plastic end but could not blow water out the other way. The NRV itself must be tiny and is obviously sandwiched between the clear plastic and the black plastic
TS
TS