This pre/post pump from Welch allows you to trap some volatiles before they can reach you pump.
Contamination – Can lead to costly repairs if one does not maintain their pump. If contaminates does reach the pump vapors can cause your pump oil to be contaminated, which lowers life expectancy and performance.
S.S. Wool – Allows for a greater surface area for vapor to condense and is chemically resistant.
These units can also be placed after the pump to capture any violates which may have made it through the pump.