Valve assembly 287879 is the prime and drain valve on the RPS 2900 filter assembly fitted to RoadLazer RoadPak and RoadPak HD line striping systems. It is the valve the operator turns to switch between priming and spraying, and the one that drains the filter housing at pack-up.

Supplied as a complete assembly with its gasket, so the valve body, stem and seal go on as one unit rather than being rebuilt in the field. A valve that will not seal in the closed or spray position bleeds pressure back through the filter housing and costs you line quality, so it is worth replacing rather than nursing.

RoadPak carries one RPS 2900 filter assembly, RoadPak HD carries two. Position and part breakdown are in RoadPak parts manual 3A5386, filter assembly 24G986, reference 240P.