Re: The PO-15 has arrived Home › Forum › Ask A Member › The PO-15 has arrived › Re: The PO-15 has arrived lloydUS Member - 1 Year (includes $3 online payment fee)Replies: 453Topics: 4 September 10, 2018 at 3:33 pm #82559 Exceptionally choice looking PO. Be sure to clean out the exhaust relief valve located on the side of the tower.