Need help / advice on building a mash tun

I got a 5 gal Rubbermaid cooler. I've been browsing the hardware stores to decide what kinds of pipes / fittings to use. Questions?

1) Is there any problems with drilling a bigger hole in the tap for the cooler? Has anyone run into problems. Cracking, etc.

2) Pipes for the straining mechanism. Copper, galvanized, PVC, CPVC, brass. Does it matter? I was thinking of CPVC and cutting slits in it. Anything I shouldn't use?

3) What style is the easiest and cheapest to build: false bottom, stainless steel supply line, or pipe with slits cut into it?

4) Any other suggestion?

I just use a mesh bag in a 60 quart cooler like BiaB but with two vessels instead on 1. There is no vorlaufing, I can still do stepped/or decoction mashes, and you never get a stuck sparge.

Took about $5 worth of material from the fabric store.

MMW said:

I just use a mesh bag in a 60 quart cooler like BiaB but with two vessels instead on 1. There is no vorlaufing, I can still do stepped/or decoction mashes, and you never get a stuck sparge.

Took about $5 worth of material from the fabric store.

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I tried that with my first all grain batch. I was thinking it'd be nice to have a more properly constructed mash tun for next time.

go with copper or cpvc.

dont use galvanized.

a S.S.braid is the easy and cheap way. its how I staeted. but I now use a copper one.

Check out this thread: https://www.homebrewtalk.com/f51/mlt-cooler-conversion-crushproof-braid-122433/

I thought this was a really clever idea, and he gives a parts list for everything.