11238 Filter Regulator for O500 July 24, 2020 $222.00 11238 Filter Regulator for O500 quantity Add to Cart Category: Parts Description Resources Description The 11238 filter regulator is 1/4″ npt and set to 38 psi for use in the O500 (retired) paint gun washer. Related products 12491 Solvent Filter Assembly $105.00 Add to Cart 23K Manifold Adapter Kit $185.00 Add to Cart 1001441 Muffler for 338 Pump $22.00 Add to Cart 19453 Nozzle Assembly with insert $46.00 Add to Cart