Bonus tip from a licensed Journeyman plumber

[feetr2c]

For those of you interested in doing the 3/8 upgrade..... The 1/4 NPT tap for cutting threads into a 7/16 hole drilled into Schedule 40 PVC pipe can be difficult to find. This is to let you know that that same 7/16 hole can be tapped with a standard 1/2 - 20 tap. This has been done in the plumbing world for years, and it relies on the fact that the standard tap is straight, whereas the NPT fittings is tapered. Don't over tighten, as your threads are only made of plastic.

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[JohnT]

Thanks for the tip!

 

[JamesW]

I have never had any trouble finding them.

http://www.buyacehardware.com/plug-tap-23136.html

http://answers.lowes.com/answers/0534/p ... stions.htm

http://www.homedepot.com/buy/irwin-1-4- ... 42106.html

http://www.harborfreight.com/6-piece-pi ... 42432.html

http://www.harborfreight.com/6-piece-pi ... 91395.html

http://www.officedepot.com/a/products/7 ... -Pipe-Tap/

There are many places that sell the tap including hardware, plumbing, fastener etc.

 

[feetr2c]

Office Depot???? It's a valid link, but I never would have thought of a place like that!

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