The Armstrong International TVS-4000 Series Trap Valve Station consists of two piston style isolation valves, test valve, and integral stainless steel strainer with blowdown valve. It eliminates potential leak points, reduces installation and maintenance time. Upstream and downstream depressurization allows for isolation at any point of service. the TVS-4000 is adaptable to any two bolt steam trap and piping configuration. It has a built in method to block and bleed traps.