wrong hole size

rysher · 01/20/2011, 08:17 PM

i have a 1" bulkhead which i'm suppose to drill 1.75", however the glass shop i went didnt have the 1.75", so i went with the 2" hole, will i have any problem with the 1" bulkhead on a 2" hole?

its for a 40B
thank you.

redfishblewfish · 01/20/2011, 10:21 PM

I wouldn’t put a schedule 40 1 inch bulkhead in a 2 inch hole. Too much “slop” and if the bulkhead slips to one side of the hole, it is very close to creating an opening.

I would suggest that you purchase a schedule 80 bulkhead. It’s going to cost considerably more money, but it will fit a lot better. A schedule 80 1 inch bulkhead fits in a 1 7/8 inch hole.

rysher · 01/21/2011, 01:05 AM

thanks i'll check it out, or maybe i can just silicone the bulkhead to the hole so it wont slip.

Ilovesalt · 01/21/2011, 01:55 AM

a 1" schedule 80 bulkhead uses a 1 7/8" hole i believe. thats alot closer than 1.75

Rockys_Pride · 01/21/2011, 01:58 AM

Quote:

Originally Posted by rysher

thanks i'll check it out, or maybe i can just silicone the bulkhead to the hole so it wont slip.

silicone is a lubricant, don't do that.

thegrun · 01/21/2011, 08:08 AM

Quote:

Originally Posted by Ilovesalt

a 1" schedule 80 bulkhead uses a 1 7/8" hole i believe. thats alot closer than 1.75

The standard 1" is 1-3/4", heavy duty (schedule 80) uses 1-7/8" which should cover a 2" hole. If possible, I would have them re-drill it to 2-3/8" and use a 1-1/2" fitting, but it is difficult to drill over and existing hole.

cakemanPA · 01/21/2011, 08:47 AM

You will be good with a sch80 bulkhead. Do not silicone your bulkheads!!!!

Sent from my iPhone using Tapatalk

rysher · 01/21/2011, 08:54 AM

thank you all.
getting the 80 then.

01/20/2011, 08:17 PM	#1
rysher Registered Member Join Date: Dec 2010 Location: Location: Location Posts: 577	wrong hole size i have a 1" bulkhead which i'm suppose to drill 1.75", however the glass shop i went didnt have the 1.75", so i went with the 2" hole, will i have any problem with the 1" bulkhead on a 2" hole? its for a 40B thank you.

01/21/2011, 01:55 AM	#4
Ilovesalt Registered Member Join Date: Jan 2011 Location: nomadic at times Posts: 35	a 1" schedule 80 bulkhead uses a 1 7/8" hole i believe. thats alot closer than 1.75 __________________ beware the hobby that eats (Ben Franklin)

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01/20/2011, 10:21 PM	#2
redfishblewfish Registered Member Join Date: Nov 2008 Location: Central New Jersey Posts: 716	I wouldn’t put a schedule 40 1 inch bulkhead in a 2 inch hole. Too much “slop” and if the bulkhead slips to one side of the hole, it is very close to creating an opening. I would suggest that you purchase a schedule 80 bulkhead. It’s going to cost considerably more money, but it will fit a lot better. A schedule 80 1 inch bulkhead fits in a 1 7/8 inch hole.

01/21/2011, 01:05 AM	#3
rysher Registered Member Join Date: Dec 2010 Location: Location: Location Posts: 577	thanks i'll check it out, or maybe i can just silicone the bulkhead to the hole so it wont slip.

01/21/2011, 08:47 AM	#7
cakemanPA Premium Member Join Date: Feb 2009 Location: Hummelstown, PA Posts: 2,353	You will be good with a sch80 bulkhead. Do not silicone your bulkheads!!!! Sent from my iPhone using Tapatalk

01/21/2011, 08:54 AM	#8
rysher Registered Member Join Date: Dec 2010 Location: Location: Location Posts: 577	thank you all. getting the 80 then.