size of intake hole on a puffer

Bodfish Mike

Sr. Member
Dec 12, 2014
485
1,292
Bodfish and Marin county CA
Detector(s) used
Garrett , Whites
keene puffer drywasher , Keene A51 Sluice
Primary Interest:
Other
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

Bronze Member
May 2, 2014
2,329
3,540
AZ
Detector(s) used
Beach High Banker, Sweep Jig, Whippet Dry Washer, Lobo ST, 1/2 width 2 tray Gold Cube, numerous pans, rocker box, and home made fluid bed and stream sluices.
Primary Interest:
Prospecting
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".
 
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Goldwasher

Gold Member
May 26, 2009
6,021
13,068
Sailor Flat, Ca.
🥇 Banner finds
1
Detector(s) used
SDC2300, Gold Bug 2 Burlap, fish oil, .35 gallons of water per minute.
Primary Interest:
All Treasure Hunting
My Thompson has six!
 
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Rick-SAR

Greenie
May 26, 2011
19
14
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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

Bronze Member
May 26, 2011
1,579
2,005
tujunga ca
Detector(s) used
xlt mxt gmz and now a gmt whites
i riveted a small piece of aluminum angle to mine to keep it flatter.
brad
 

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