PLASTIC VENT CAP allows venting while keeping out debris, insects, and rain.

screened plastic vent cap
2" FEMALE THREAD VENT CAP
slip vent cap
SLIP VENT CAPS
Vent Cap cutaway view
CUTAWAY OF MALE VENT CAP
Flanged Vent Cap
FLANGED VENT CAPS (CUSTOM)

PLASTIC VENT CAP

All-plastic mushroom style tank vent cap or tank breather cap is corrosion-proof. Allows containers to vent while keeping out rain, debris, airborne seeds, and insects. PVC body with polypropylene screen. Used for roof vent stacks, air intakes, machine cabinets that need venting, exhaust pipe, and more.

Available in standard NPT fitting sizes 1/2″ fitting size and larger in various mounts: male thread, female thread or slip fitting, and flange mounting by request. All sizes up to 6″ are always in stock.

The vent caps provide a means for the enclosure, or tank, to vent while providing a rugged protection of the screen inside.  The plastic vent caps have an open area of 40% of the pipe cross-sectional area. This wil introduce some reduction in air flow but is usually not a problem. Check the Technical Info page if this is a concern.

SCREEN SIZES

  • 2″ and smaller uses mesh 17×17 strands per inch.
  • 3-6″ sizes, 10×10 mesh
  • 8″ and larger use PVC sheet, 1/8″ thickness  with 1/8″ diameter holes. 

FDA regulations for potable water storage are on page 166 of the 2017 Requirements. In addition, the EPA has its own standards which are met with a 24 mesh screen.

For plastic vent caps sizes 8 inches and larger, or for custom configurations such as different screen meshes, flanged vent caps, check valves, please phone us.

Vent cap sizes
SIZES FROM 1/2" TO 8"

MEASUREMENTS OF SLIP VENT CAPS

1 inch vent cap
1 INCH
1.25 inch vent cap
1.25 INCH
Vent cap internal measurement
1.5 inch
2 inch vent cap
2 inch
3 inch vent cap
3 INCH
4 inch vent cap
4 INCH

MEASUREMENTS OF THREADED VENT CAPS

Threaded Fittings Size Chart
Specifications
  • Material (housing and cap) …………………PVC, schedule 40
  • Screen mesh material……………………… polypropylene
  • Screen mesh size (2″ and smaller) ……… 17×17 mesh
  • Screen mesh size (3-6″) ……………………10 x 10 mesh
  • Screen mesh size (8″) ………………………PVC with” 1/8″ dia. holes
  • Open area……………………………………40% (all sizes)
  • Maximum temperature………………………150F (65C)
  • Threaded cap pipe thread type…………… NPT

ORDER HERE

Note when ordering: measured size is not the same as the nominal "size". Please refer to the charts above to be sure.

Vent cap

Select size and orientation:

Pipe Size
Mounting Type