11238 Filter Regulator for O500 July 24, 2020 View cart “23K Manifold Adapter Kit” has been added to your cart. $222.00 11238 Filter Regulator for O500 quantity — OR — 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 54P1 Plastic Nozzle $18.00 Add to Cart 13836 Outer Filter Bags $82.00 Add to Cart 19453 Nozzle Assembly with insert $46.00 Add to Cart