DIY Steam Mash System by Yuri

The flowmeters are dwyer 4" VMB acrylic variable area priced at $47 Model 80 (.5 - 12 GPH) for water and Model 81 (6 - 60 GPH) for wort. The boiler water flow and burner gas flow is controlled by needle valves on the lower left side of panel. Wort flow during sparge cycle is controlled by a swagelok ball valve in middle of panel that directs flow to boil kettle. Old boiler can bring .25 gpm of water from 47 degrees to boil and new boiler twice that flow rate.

Couldn't you just use one of those "Steam Mouse" steam cleaners?

Or does it take a ridiculous amount of steam to raise the temp in a 10 gallon mash?

Obviously I'm just thinking of stepping the mash with steam, not using it as a primary heat source for entire brewday.

A steam cleaner would almost certainly not have enough power to get the job done. I used a 6000W element, and it ran almost constantly to keep the pressure up whenever the steam valve was open. A small steam cleaner would not have that sort of energy potential.

I've since replaced this boiler with a bigger, better version:
https://www.homebrewtalk.com/f51/yuri-goes-big-steam-new-boiler-point-use-water-heater-125953/

What is the black tubing you used?