Is this for a duel tank truck? I've thought about going to two tanks. Classic Trucks and NPD has the tanks and fuel lines and all that but it still looks like a pain to install. And now ya'll are saying the three port valve isn't available? I have a fuel tank with three hoses on top and I can get the same for the other tank. There are some that are four hose tanks and I think they may be for the two tank set up but I'd have to study it some more.
So where else can the three hose valves be found? By any chance does Chevrolet still have duel tank trucks and may offer this valve for them? Or have they gone super complicated like everything else with vehicles these days, all computerized?
The standard 6-port setup would be for a three hose sending unit. You have feed, return, and vent. The vent goes to a wobble valve or the charcoal canister depending on emissions, the feed and return from each tank go to the switching valve. Early 6-port(like mine) are a single wire activation that grounds through the body of the valve itself.
Almost every year could have had either 3 port or 6 port, especially early years. The later years went to almost exclusively 6 port to remove vapor lock issues that occurred with the 3 port setup and the lack of return line.
Its also important to note only long bed trucks have enough room to fit a 20 gallon saddle tank. All short beds can only fit a 16 gallon on either side due to the forward rear spring mount being in the way of the larger tank on the short bed trucks.
