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I've made simple bends in SS tubing using a circle die cut from mdf or ply and a cheater bar. Bolt the circle to the bench and make a stop to hold the tubing from moving and use the cheater bar for leverage (I used a piece of tubing with an ID about the ss tubings od. Bend slowly until you...

This. I don't know of any fridge that works any differently. I cut the insulation out between my fridge and freezer on my side by side. haze

That looks a lot like mine. There are a lot of reasons why I prefer something like this over a keg. I only have 10 kegs, and I don't always have one empty or clean. Also, I'll often just leave starsan in mine to give my lines a rinse. It is also a lot easier to fill in the sink versus a keg...

Personally, I find it much more convenient to fill a 1 gallon container with hot cleaner, than to deal with a 5 gallon keg. haze

It is just going to depend on how big it is. I have a magic chef fridge in my office, for example, that is about 3.5 cuft, which would not have worked. haze

I got ½ OD 5/16” ID silicone tubing from McMaster. It is expensive, at 3.99 per foot, but it is much cheaper than the cole parmer stuff and works well. I'll hunt down the number if you need it. You can then just connect that to your regular tubing using plastic barbs. haze

I recommend you try the anode idea. here is a pic of mine: It corrodes so the steel doesn't have to. They put these in water heaters so that the steel tanks and elements don't rust out. Magnesium is the best, but AL will work. That is just a piece of aluminum rod bolted to the rim...

Exactly. proceed carefully, but if you screw it up, you've only wasted time. OTOH, you could just use it as a freezer :) haze

I have a very simple and cheap DIY sight glass. I used 3/8 OD polycarbonate tubing. It is unbreakable and as clear as glass. I don't have a pic of it now, and I'm out of town for the week. Basically, I installed an angle compression fitting in lower part of the brew kettle (1/4" MPT to 3/8...

That's helpful. That isn't how mine are done -- mine has the locknut on the outside, because it is brass. For the record both my kettle and my hlt went together without any trouble, no leaks and no silicone required. My cooler MT on the other hand, required silicone, but I think that is...

I don't disagree, but are you using a lock nut or are you essentially using the valve as the lock nut? haze

This will echo some of what has already been said, but I'll add a bit. First, as other have said, overtightening is as bad or worse that undertightening. Also, the fact that you have to thread it in could be causing you trouble, as you might not be getting the nut and washer up against the...

I doubt it. I think the largest one he has has a flow rate of 2/3 gallon per minute. (3.8 mL per revolution at 600 rpm = 2.28 L per minute or about .6 gallons per minute) haze

That stone looks like mine. If it is, it came brazed to the SS tube. Also, you're going to get plenty of O2 in solution; I wouldn't worry about your flowrate. I would worry about how fast you are going to run out of O2. haze

Yuri, looks like you made a very nice purchase! You can always find other motors to run the other pump heads, having the brackets will make that easier. haze

I don't know about the weld situation, but I have a bolt in water heater element in my HLT, and to keep it from rusting when I filled it the night before, I had to put a sacrificial anode in the keg. Mine is just an aluminum rod that I bolted in. Not as elegant, perhaps, but no rust on the...

Look good! Just one suggestion. You might want to replace the zip ties with SS hose clamps. haze

Thats awesome. Just the 4 pump heads are worth that and more. Are they stackable? Mine aren't, thats why I needed a dual shaft motor. haze

I have about $120 invested in the two head pump. Of course, if the parts were purchased at retail, it would be very very expensive. I bought the motor in a non-working state. The insides were rusted and the magnets broken. I cleaned it and repaired the permanent magnets with jb weld. I...

I got the pump heads on ebay. They are Masterflex 7035-21. These pump heads have four SS rollers and take L/S number 35 tubing. That tubing is ½” OD and 5/16” ID. At 600 RPMS these pumps deliver about 2300 mL/min. I’m getting half that at max speed. The pumps deliver 3.8 mL/min per 1 RPM...