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14-07-2020, 07:27
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#1
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Registered User
Join Date: Nov 2014
Location: Savannah GA USA
Boat: Chris White Atlantic 47
Posts: 215
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Thinwall PVC Sanitation Pipe Source?
My boat uses a thinwall (1.7mm to 2mm) grey PVC pipe for airflow ducts from bilges. These are 75mm diameter, and are not interchangeable with US PVC pipes (closest is 3"). They are produced and sold in Chile by companies like Hoffens, Vinilit, and Tigre as "Tuberia PVC Sanitaria Gris". One example is Vinilit and an be purchased online at places like Sodimac: https://www.sodimac.cl/sodimac-cl/product/539287/Tubo-PVC-S-75mm-x-3m-Gris-Cementar/539287.
I'm trying to find a way to purchase from the USA without incurring huge costs for shipping and customs fees. Anyone know how to do this?
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14-07-2020, 07:46
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#2
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Writing Full-Time Since 2014
Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 9,569
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Re: Thinwall PVC Sanitation Pipe Source?
2 1/2" DWV will be closer than 3".
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14-07-2020, 07:46
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#3
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Registered User
Join Date: Apr 2011
Location: Florida Gulf Coast
Boat: center console
Posts: 227
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Re: Thinwall PVC Sanitation Pipe Source?
You didnt mention if 75mm is an ID or OD, maybe a 3" ID flex duct will work.
Check www.mcmaster.com, or maybe you can just wrap tape to make up the .05" difference?
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14-07-2020, 07:58
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#4
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Registered User
Join Date: Aug 2013
Location: Florida
Boat: 2000 Searay 380 Sundancer
Posts: 1,087
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Re: Thinwall PVC Sanitation Pipe Source?
The outside diameter of the 3" Schedule 30 thin wall PVC only differs by 1.2mm.
That part doesn't work?
__________________
2000 SeaRay 380 Sundancer Mercruiser
454 MAG MPI Horizon 380hp / Westerbeke 7.0KW BCGB
many cool mods
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14-07-2020, 08:24
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#5
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Registered User
Join Date: Nov 2014
Location: Savannah GA USA
Boat: Chris White Atlantic 47
Posts: 215
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Re: Thinwall PVC Sanitation Pipe Source?
Quote:
Originally Posted by wingless
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I tried 3" parts from Amazon https://www.amazon.com/gp/product/B00HXHAMWO, they were much too large. I know that the difference shouldn't have been so much, but it was.
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14-07-2020, 08:26
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#6
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Registered User
Join Date: Nov 2014
Location: Savannah GA USA
Boat: Chris White Atlantic 47
Posts: 215
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Re: Thinwall PVC Sanitation Pipe Source?
Quote:
Originally Posted by 1affiah
You didnt mention if 75mm is an ID or OD, maybe a 3" ID flex duct will work.
Check www.mcmaster.com, or maybe you can just wrap tape to make up the .05" difference?
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I believe it's OD due to a drawing from by Tigre of the bell end ID: https://www.tigre.com.br/en/node/393
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14-07-2020, 08:29
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#7
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Registered User
Join Date: Nov 2014
Location: Savannah GA USA
Boat: Chris White Atlantic 47
Posts: 215
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Re: Thinwall PVC Sanitation Pipe Source?
Quote:
Originally Posted by thinwater
2 1/2" DWV will be closer than 3".
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DWV is a much thicker wall, and won't interface.
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14-07-2020, 08:33
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#8
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Registered User
Join Date: Aug 2013
Location: Florida
Boat: 2000 Searay 380 Sundancer
Posts: 1,087
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Re: Thinwall PVC Sanitation Pipe Source?
Quote:
Originally Posted by wingless
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Quote:
Originally Posted by torrmundi
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The Amazon page does not list the Schedule.
This Schedule 30 3" fitting at Lowes might be different.
__________________
2000 SeaRay 380 Sundancer Mercruiser
454 MAG MPI Horizon 380hp / Westerbeke 7.0KW BCGB
many cool mods
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14-07-2020, 08:42
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#9
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Registered User
Join Date: Aug 2013
Location: Florida
Boat: 2000 Searay 380 Sundancer
Posts: 1,087
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Re: Thinwall PVC Sanitation Pipe Source?
Also, an airflow duct, using the slightly larger US 3" (76.2mm) versus International 75mm might be acceptable for the application using something like RTV adhesive, to fill the gap and to bond the parts.
__________________
2000 SeaRay 380 Sundancer Mercruiser
454 MAG MPI Horizon 380hp / Westerbeke 7.0KW BCGB
many cool mods
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14-07-2020, 08:47
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#10
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Thinwall PVC Sanitation Pipe Source?
Could you use 3” aircraft SCAT hose instead?
https://www.aircraftspruce.com/catalog/appages/scat.php
Not real cheap, but durable, flexible, won’t collapse like the cheap vinyl blower hose, smooth bore so very good air flow and very high temp resistance.
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14-07-2020, 08:58
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#12
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Registered User
Join Date: Nov 2014
Location: Savannah GA USA
Boat: Chris White Atlantic 47
Posts: 215
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Re: Thinwall PVC Sanitation Pipe Source?
Quote:
Originally Posted by hlev00
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Probably; but at least once they ran two pipes in parallel too closely to allow a thickwalled coupler like these.
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14-07-2020, 09:01
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#13
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Registered User
Join Date: Sep 2018
Location: Nanaimo, British Columbia, Canada
Boat: Currently boatless
Posts: 165
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Re: Thinwall PVC Sanitation Pipe Source?
You might want to check out the flexible tubing that many workshop equipment companies sell to work with woodshop dust extractors.
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14-07-2020, 09:04
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#14
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Moderator Emeritus
Join Date: Oct 2013
Location: Jacksonville/ out cruising
Boat: Island Packet 38
Posts: 31,351
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Re: Thinwall PVC Sanitation Pipe Source?
Mobile homes use thin wall 3” sewer line, it’s black and it’s not PVC I don’t think, but it’s cheap.
It’s ABS I believe, if your in Savannah there used to be a large Mobile home supply on hwy 17 on the way to Richmond Hill.
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14-07-2020, 09:10
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#15
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Registered User
Join Date: Jan 2020
Location: Hilton Head, SC, USA
Boat: DeFever Raised Pilot House 49
Posts: 234
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Re: Thinwall PVC Sanitation Pipe Source?
If u are careful, and have a male blank of the correct diameter, you can heat the PVC & expand the terminal 1” With the male blank to fit the PVC standard couplings, then use the big box store stuff for the rest of you run(s).
__________________
Jeremy
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