I would suspect that the long rubber hoses that replace the steel hoses
simply dampen the pulsations of the pump, which is why you don't need a
restrictor as Frank says. How long is the loop from rack to pump, about 20
feet or so?

Stuart

>My experience running Frank Condelli's hose set to replace the pipes
>for the past 3 or so years confirms this. Frank has said his setup has
>no restrictor  valve. No noise from my pump.

The restrictor in question isn't in the long run, it's in the short hose
that starts directly at the pump; so if you haven't replaced that you still
have the restrictor.

Yrs,
d