"RG" wrote in message news:KRGQa.6503$Bp2.4178@fed1read07...
Is there an alternative to the anti-siphon
that would be easier to monitor the accumulation and clean? Thanks.


Assuming you have the mechanical ball and spring type anti-siphon valve,
there is an alternative. I switched from mechanical valves to
electrically
operated anti-siphon valves, to help resolve a vapor locking problem. In
terms of your issue, I don't think the electric valves would be any easier
to monitor or clean, but they might be less likely to get fouled in the
first place. The problem with the mechanical valves is that they are
always
in the business of restricting fuel flow, due to the constant resistance
of
the spring. Ideally, you would like to have flow restriction only when
the
engine is not running, but the spring the mechanical valves is constantly
delivering resistance to the fuel flow. The fuel pump must always
overcome
that spring resistance, as well as generate the vacuum required to draw
the
fuel from the tank. I can see where heavily varnished fuel could easily
muck up a mechanical valve, perhaps restricting its ability to be fully
opened by the fuel pump. The electric valves open and close the fuel line
by way of a solenoid operated valve. When the engine is running, the
valve
is fully open, and when not, the valve is fully closed. Since the valve
is
operated electrically. the fuel pump never has to generate the vacuum
necessary to overcome any spring resistance, as in the case with the
mechanical valves. Perhaps this type of anti-siphon valve would be less
likely to gummed up by fuel varnish. Maybe not.


Do you have an online reference where I can look at one of these electronic
devices?