Erm...I use a hose with fresh water.
You are right that they shouldn't soak unpressurised however - but only if you have the first stage lower thn the second, or in the water. Basically what you don't want is water getting up your hose and into the first stage.
You are right that they shouldn't soak unpressurised however - but only if you have the first stage lower thn the second, or in the water. Basically what you don't want is water getting up your hose and into the first stage.
