Anti syphon valve help.

piperca · May-04-2008, 05:43 PM

I need anti syphon valves for my fuel system. I'm using 3/8" hose. The only thing I can find are those aluminum valves made by Tempo and Sea Choice. I would rather exclude them from the system, but I believe they are required. Does anyone know if I can get around this?

Bank Robber · May-04-2008, 07:01 PM

Did you try Capt Locker in SB?? how's rest of your project coming Andrew?

piperca · May-04-2008, 07:14 PM

Quote:

Originally Posted by Bank Robber

Did you try Capt Locker in SB?? how's rest of your project coming Andrew?

I'll give them a call.

Dean, the project is going a bit slow. I'm really busy at work and I'm in the midst of school, too. I'm hoping to get the bulk of the work done next weekend and should be ready for engines by the end of May ... fingers crossed!

1bigfisch · May-05-2008, 06:34 PM

Dont know the answer to that Andrew. Would a 45 desert eagle help with the syphoning problem? jk. Did you get your tanks set yet?

piperca · May-05-2008, 08:33 PM

Not yet. I hope to get the coal tar epoxy on them this weekend. I found the epoxy at Grainger, so I'll be picking it up this week. Between this weekend and next, I hope to get the tanks set, hoses run, filters installed and the wiring back together, then I can get her over to Grant for the final touches. I'll be so happy when this is all finished. I really thought it would have been finished by now, but life keeps getting in the way!

1bigfisch · May-06-2008, 12:43 PM

Keep your chin up Andrew, your almost there. I've got 2 years in on mine and still not done with all the issues, but wtf, gotta love those boats.

Kareem Korn · May-06-2008, 01:15 PM

my bad

piperca · May-10-2008, 12:09 PM

Would a loop in the fuel line, above the tank, be sufficient to prevent a syphon condition? I was thinking of making a loop with some aluminum fuel line, before making the transition to rubber line and valve ... what do you think?

sickcat · May-10-2008, 05:22 PM

Quote:

Originally Posted by piperca

Would a loop in the fuel line, above the tank, be sufficient to prevent a syphon condition? I was thinking of making a loop with some aluminum fuel line, before making the transition to rubber line and valve ... what do you think?

Sorry to say that won't work. You really need the check valve. If at all possible install the valve where you can access it later just in case it needs attention. I would not be afraid to use an aluminum valve if it is in contact with the aluminum fitting connected directly to the fuel tank - even a fuel sender/pickup assembly. I always recommend using an aluminum fitting on an aluminum tank. Putting a brass or steel fitting directly onto an aluminum tank is asking for corrosion problems down the road. I know of 2 boats right now that have perfectly good aluminum tanks except where a brass fitting is on the threaded fitting that is part of the tank. Sad to have to consider cutting up the deck to deal with a tank which is fine except where the fitting attaches. Both are factory installs by reputable manufacturers. At least with an addtional aluminum fitting you may still have corrosion issues but they will be between the aluminum fitting and the brass one and will save the threaded fitting that is part of the tank.

piperca · May-10-2008, 06:41 PM

Damn it ... well, it was worth a try!

Dirtguy · May-10-2008, 09:12 PM

I think it's thermal. When the engine is running, it's hot, or generating heat. The fuel is hot. When you stop, it gets cooler and sucks it up from the tank, right? Since the carb, or pump is sealed?

Am I missing something? Most production designed plumbed system don't usually have an issue.

DG

piperca · May-10-2008, 09:29 PM

Carl, that's over my head!

I noticed that the Tempo fuel shut off valves are described as "providing anti syphon protection;" does this mean they have an anti syphon valve built in?

Bogii · May-11-2008, 12:05 AM

With the price of fuel That rig would be sick if you pluged up those two holes in the transon made one and dropped a 300hp cummins and get 3.5 per gallon
Its not too late.

Bogii TigerLily Sports Fishing

sickcat · May-11-2008, 12:06 AM

Quote:

Originally Posted by Dirtguy

I think it's thermal. When the engine is running, it's hot, or generating heat. The fuel is hot. When you stop, it gets cooler and sucks it up from the tank, right? Since the carb, or pump is sealed?

Am I missing something? Most production designed plumbed system don't usually have an issue.

DG

Anti syphon valves are put in so if the fuel line is leaking the tank won't dump into the bilge. Think engine compartment fire. Most production boats have them nowadays. Not sure but I am guessing that it is a AYBC standard.

piperca · May-11-2008, 08:06 AM

Quote:

Originally Posted by Bogii

With the price of fuel That rig would be sick if you pluged up those two holes in the transon made one and dropped a 300hp cummins and get 3.5 per gallon
Its not too late.

Bogii TigerLily Sports Fishing

You know, I thought about it ... just for a second. I really can't afford the two gas motor, let alone an expensive diesel. I looked at repowering with D3s, but that would have cost me 40K, which is over twice what I'm going to pay for this install. Yeah, the range would be nice and the MPGs better, but I'd never recoup the difference between gas and diesel. If someone wants to throw 20K+ at me, I'd be happy to go that route!