Strewth Ausdb, that is one long chiller and all copper-must have been a dear one to build with what I guess is 3/4" copper on the outside. I priced full rolls of 5/8 and 3/4" copper and they were in the order of $180-$200 per roll. Coupled with the inner copper pipe it was going to be dear. Let me guess your a plumber , nah nice chiller though.
So guys what do you reckon the minimum length for a counterflow wort chiller would be? Obviously the real answer lies in how cold your tap water is, but being in Tassie my water is pretty chilly all year round but I'm wondering how well a 6m one would work? (1/3 of a roll-can then make three) Who uses a 6m CFWC, what are your water temps and how low can you go. I like being able to chill my wort to pitching temp and in Tassie I can get my wort down to 10-12C usually with no probs. I would like to go a CFWC in future. Thoughts.
3/8" inside 5/8" outside its about 9m long (what I had left off a roll of 3/8")
I'm an aircon/fridge mechanic so I had those sizes laying around, if you are buying copper go to a refrigeration parts supplier not plumbing for those sizes. Also 5/8" is about the largest size you would want to try and bend by hand around something, especially once you have the 3/8" copper inside it.
I have heard that 6m is about the minimum length, it all comes down to the flow rate in and out, the shorter it is the slower your flow rate of wort to get the same effect
I recently cut 4 metre off my 1/2" immersion chiller, after crimping it every 40mm to give some turbulence and jacketed it with 20mm poly pipe. It needs to be longer but it was a real struggle to get the poly pipe to slide onto the coil after about three metres.
Some quick figures--- Scarboro scheme water is already up to 19C (it will get to 22C in summer!) but if I restrict the flow to 1 litre per min., I get an outflow at 23C which while not ideal, is adequate. Two hours in the fridge gets me close enough to a reasonable pitching temp.
Better post a photo of mine then too.
It's 6m of 316 Stainless Steel with black polypie & fittings.
The SS coil cost $50 and the fittings and hose cost $10 (I have 12m of black polypipe left over).
Only used it once and it was a pretty dodgy setup. Because it was gravity fed it was a slow flow but I used my "temprite"/magic box and a small coil of copper tube as a pre-chiller for the tap water. The beer was coming out very cold so I slowed the water flow down. I think that once properly setup it should work well. I intend to get some SS fittings and turn it into a CFWC with inline aeration and thermometer.