thanks for the info do you mean hook into my main supply line where it comes out the vent openingif so thats what i did i also set the new spool releif valve to give myself a little more down presure and i did split the pump .so i bought a new one put it in and backed the presure off also can you rebuild the old pump i do have a spare pump in my other 8011 that has a worn shaft and keeps blowen seals can i use the blown one and make one good pump