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With an 8" crystal dragon and no fire in the boiler yet I've been thinking about how to install CIP? Has anyone considered a segmented line of spray balls running through the trays up inside the column?
To try my idea, I made a couple of spray balls from two 15 to 20mm copper reducers joined with some old 20mm pipe and with a short length of 15mm in the base to slot into the top of the spay ball below. I put a ring of silicon in the top outlet of the spray ball to seal the downpipe from the spray ball above. Drilled 2 rings of 8 x 1.5mm spray holes in the top of each spray ball. The top ring as close to 10 degrees from vertical as I could and the second ring at around 45degrees.
My concept is that each plate would have a new 15mm holed drilled in it to take the 15mm downpipes & as the column is assembled a spray ball would be dropped into each plate, connecting to the ball below, making a continuous line of spray balls. The bottom pipe would extend below the plate into the boiler and have a fitting to take the CIP line from the pump. The top spray ball is capped off.
But before I drill holes in the plates, I rigged up a 2 plate concept test through the centre bubblecap holes and connected a garden hose. It definitely puts out enough water so I think it'll clean well (couldn't upload an mpeg so attached a few frames, hope they're not too small to see what's happening).
Now to the $60k questions: