1539 Seal Kit used on Feb 2000 – Feb 2005 Auto-Belays.
The difference between the 1539 and 1539-1 seal kits is just one seal. Instead of the one piston seal and one crown seal in the 1539-1 seal kit, the 1539 seal kit has two piston seals.
The date above is only a guideline. Sweeco cylinders were also used during this period. It is also common to find “1539-1” replacement cylinders on auto-belays that have been serviced.
Please confirm by searching on the cylinder for the “1539” stamp before ordering. You can find this number on the side of the cylinder, opposite of where the hose connects. The number will start with MPH followed by 4 digit date stamp, and then the next group of numbers is the seal kit.
Please call with any questions.