UM......well your pump can run at 30 no prob...but we dont get any requests for that pressure (you are my first really) so we dont have a spring. You might be able to run the 45 PSI spring (PS-1013) with the MRT-1001 to get it down about 10ish PSI......that is about the best i got other than the PS-1020 that puts you about 18-20ish.