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  1. P

    Boxxer 421 help plz

    I got it was scrolling and came across wandwizards post about check valve in the unloader and yep that was it
  2. P

    Boxxer 421 help plz

    Ok so i have a boxxer 421 and the pressure slowly drops while its building temp and then no pressure when its at temp i just put a new silencer and heat exchanger on it and new thermal relief valve new unloader valve new water pump im at a loss at to what the issue is i have took lid of tank and...