State Industries SANDBLASTER SBD85 500 - Manual (Page 15)

SBD TANK TYPE HEATERS
SERVICE HANDBOOK
Technical Training Department
Ashland City, TN ©2003
14
Nine Rules for Good Vents (continued)
6. Horizontal pipe should be sloped upward at a
minimum of ¼” per foot.
7. Horizontal elements should be limited to 75% of the
vertical rise of the vent above the connection.
8. Flue gases must be kept hot for proper venting.
9. Obstructions can cause down drafts.
The vent pipe should be extended to meet local codes