capable of maintaining a fluid tight seal at this junction in a preferred embodiment the o ring is made from hydrogenated nitrite butadiene rubber in a preferred embodiment the invention also comprises a quick release valve 17 connecting the access port to the internal chamber inlet line the invention further comprises an internal chamber outlet line 18 extending into the lower volumetric region in a preferred embodiment the internal chamber outlet line extends substantially to the bottom of the lower volumetric region as shown in fig3 in a preferred embodiment as shown in fig5 the present invention further comprises quick disconnect valves 27 with positive shutoff capabilities installed on the inlet and outlet sides of the filter housing connecting the filter housing to the internal chamber inlet line and further capable of isolating fluid flow between the filter housing and the internal chamber this feature permits isolation and quick removal of the filter housing when it must be replaced this capability significantly reduces the time and costs associated with filter replacement the present invention further comprises a check valve 46 mounted in the bottom of the filter housing in such a way that fluid cannot flow up from the upper volumetric region into the filter housing in one preferred embodiment as shown in fig2 the check valve is spring loaded the present invention further comprises an outer housing or accumulator 30 surrounding the internal chamber and defining an annular region around the internal chamber the outer housing has a depth that is greater than the depth of said internal chamber as shown in fig2 and 3 an.