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Old November 8th, 2014, 06:24 PM
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Default Homebuilt RO Test Run

Well today was the day to give the RO a good run to see how it runs.
All I can say is let there be leaks!!

I kind of figured that there would be some but not is some of the locations. I will work on them tomorrow and give it a run again. They are all on the high pressure side and they get worse as I crank up the pressure. I had it up to 200psi and it was dripping rather fast at a couple of places, Top of the SS vessels where the High pressure hose hook up to. Also for some reason I have a leak on the barb fitting coming off the concentrate flowmeter?? Very odd there. Also I have a leak down at a nipple that is between 2 T fittings coming off the high pressure pump, another odd place for a leak.

I need to adjust the low pressure switch and also the high pressure switch.
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Old November 8th, 2014, 07:56 PM
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I HATE THAT. now I hate hose clamps because they have a dead spot under the screw area. I would use pinch clamps. Now Dennis I believe I mentioned in an earlier thread about having unions so you can fix leaks in plumbing ..........
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Old November 8th, 2014, 08:03 PM
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If you use hose clamps, use 2 of them side by side and offset the screw/flat part at least half inch or more depending on the size of the clamps and hose and this will take care of any leaks under the flat spot.
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Old November 8th, 2014, 09:11 PM
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Brandon that is just what I am going to do, I do that with my mainline fittings.

Haynes, I did put a few unions in, and when I fix these leaks I may put a few more in just in case I need to take it apart again.
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Old November 9th, 2014, 10:52 AM
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When plumbing with PVC you have to use tape BUT tape can allow over tightening and that can crack fittings. I like to glue as much as possible and then use unions to break the plumbing up into smaller sections so if something does go wrong your only replacing that section. I also use plumbers grease on the PVC union threads.
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Old November 9th, 2014, 04:30 PM
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I got all the leaks looked at and redone.
The only concern for me right now is where the high pressure hoses go into the end caps of the membrane vessels. They just done get nice and tight. It even says on the end cap to not tighten more than 65 in/lbs. That is not very tight. I put plenty of good quality Teflon tape on the threads and put them back together. Fingers crossed when I fire it back up another day.

I was thinking about maybe using a thread sealant, like the kind you use for water or gas lines. Maybe that kind of sealant once cured would give a good seal. I just worry that if any residue is on the inside might screw up the membranes.
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Old November 9th, 2014, 05:13 PM
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I would not use it it will taint the sap. Six wraps of the Teflon will seal it every time.
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Old November 9th, 2014, 05:29 PM
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PVC threads and Teflon tape will work but be very careful . 6 wraps IMO is a bit too much Chuck. 3 wraps as far as I know is sufficient .

When I worked on chlorine gas evaporators ( boiling liquid chlorine in encloses vessel) , Cl2 chlorinators ( feed gas under vacuum) at the plant you didn't use tape on ANY fittings , pipe dope per manufactures instructions rated for cl2 gas.
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Old November 9th, 2014, 06:22 PM
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Blue monster Teflon tape is the only way to go!
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Old November 9th, 2014, 07:03 PM
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I believe the pipe dope and Chlorine gas qualifie as FOOD GRADE
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