size of intake hole on a puffer

[Rick-SAR]

What is a recommended size of the intake hole on the bottom of a small puffer dry washer?

 

[Bodfish Mike]

Hi Rick
I used a 3" hole saw for mine and a mouse pad as the flapper and it works well.
I'm not near my Keene right now or I would meas what they did.
Mike

 

[arizau]

The hole does not need to be very big but flapper must overlap the hole enough on all sides to get a seal on the upstroke then fly up a bit on the downstroke to allow air to immediately enter. I used vinyl upholstery fabric for the flapper on a mini dry washer I built. I think the hole on my Whippet is about 1 to 2".

 

[1637]

3inch
brad

 

[Goldwasher]

My Thompson has six!

 

[Rick-SAR]

thanks all. I am going use a 3" hole covered with a 1/16" rubber flapper from Lowe's. Seems to work fine. Thanks again.

 

[1637]

i riveted a small piece of aluminum angle to mine to keep it flatter.
brad