The PLASTIC MUSHROOM STYLE TANK VENT CAP, or tank breather cap, keeps out debris, insects, seeds, and rain while allowing tanks to properly vent. All plastic construction is corrosion proof.
Quick Specifications
- Material (housing……………………………PVC, schedule 40
- Screen mesh material………………………polypropylene
- Screen mesh size (2″ and smaller)……… 17×17 mesh (conversion chart here)
- Screen mesh size (3-6″)……………………10 x 10 mesh (conversion chart here)
- Screen mesh size (8″)………………………perforated 0.125″ PVC sheet, 0.125″ dia. holes
- Open area……………………………………40% (all sizes)
- Maximum temperature………………………150F (65C).
MESH SIZE
WEIGHTS
SIZE WEIGHT
1/2 inch………………45g
3/4 inch………………67g
1 inch…………………84g
1.25 inch…………… 148g
1.5 inch………………174g
2 inch…………………185g
3 inch…………………683g
4 inch…………………672g [2.7 pounds]
6 inch…………………1.8kg [6 pounds]
8 inch slip…………… 5.4kg [12 pounds]
PIPE SIZE
MAXIMUM AIR FLOW
How much air flow the vent caps are capable of, is a common question. The answer is that there is no real limit to the amount of flow through the vent caps, but as the flow increases, the back-pressure created increases. (same as with a valve or elbow in the pipe) So the real question becomes: how much back pressure will your system tolerate at the maximum anticipated air flow rate? The relationships are described in the chart.
AIR FLOW CURVES FOR VARIOUS PIPE SIZE