Vulcan-Hart GRS25 Service Manual page 7

FILTER INTER PLUMB DISCARD TUBE (Option)
1. Close the drain valve.
2. Place shortening discard pan under the tube plug end that will be serviced.
3. With a pipe wrench open the plugged end of the tube up.
4. Insert the clean-out rod supplied with the fryer into the opening.
5. Push the rod in and out of the tube to clear any debris that may be clogging the tube.
6. If clean out rod is not long enough, a plumber's snake may be required to dislodge a clog.
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