npf1
Well-Known Member
Anyone have any idea on this. Can they last years in a pickled state? Does the biocide need to be renewed periodically? Any good/bad experiences or useful tips to share?
Thnaks in advance.
Thnaks in advance.
Watermaker membranes - how long can they be pickled for?
- Thread starter npf1
- Start date
Jonny_H
Well-Known Member
Just been enquiring about this. Katadyn recommend re-pickling every 12 months.
Jonny
Jonny
iangrant
Well-Known Member
really depends on what it looks/smells like . the membrane itself doesn't actually get pickled. You shouldn't push the solution through the high pressure side (well on the spectra unit)
Ian
Ian
npf1
Well-Known Member
ian - can you explain your comment a little more as I'm new to this eg how do you pickle it without pushing the solution through the membrane?
iangrant
Well-Known Member
On the spectra i had the initial pressure pumps cycled the water into the low pressure side of the unit then once all the solution had been run through and just sea water was in the pre filters, the clarke pump valve was closed which really squeezed the water through the main membrane.
The spectra man came on board and said two things one NEVER pickle the membrane and never bother with a tester, your tongue is the most sensitive tester in the world and if there is no salt taste the water is pure enough to drink.
If you log onto the spectra web site the manual and pickling rgime is explained.
Ian
The spectra man came on board and said two things one NEVER pickle the membrane and never bother with a tester, your tongue is the most sensitive tester in the world and if there is no salt taste the water is pure enough to drink.
If you log onto the spectra web site the manual and pickling rgime is explained.
Ian
jeremyshaw
Well-Known Member
In my own experience:
1. I ended up with a 'spare' membrane and stored this in pickling solution in 4" drainpipe for 18 months and it was fine. 6 months is the generally stated limit, but I know people who exceed that.
2. Sea Recovery, who make my watermaker, say that when pickling you should make water at low pressure (c200psi) for about ten minutes to ensure that the whole of the system and the product line is sterile. If you are leaving the system for several months this sounds sensible to me - I have done it several times with no ill effects.
1. I ended up with a 'spare' membrane and stored this in pickling solution in 4" drainpipe for 18 months and it was fine. 6 months is the generally stated limit, but I know people who exceed that.
2. Sea Recovery, who make my watermaker, say that when pickling you should make water at low pressure (c200psi) for about ten minutes to ensure that the whole of the system and the product line is sterile. If you are leaving the system for several months this sounds sensible to me - I have done it several times with no ill effects.
A
Anonymous
Guest
That's not my reading of the Spectra manual. I mix up the solution in a bucket and then run it through the whole system including the membranes. I leave it circulating, with product going back into the bucket - i.e. you could carry on for ever if you wanted to - for around ten minutes then discharge overboard until the bucket is empty. Close all valves and leave it until the following season.
The Spectra man who came to check mine out after I bought the boat (it had not been used for a couple of years) said that the only thing to look for is smelly or dirty water coming out when you start it up. Makes sense, really. On that basis I think you could leave it pickled indefinitely.
The Spectra man who came to check mine out after I bought the boat (it had not been used for a couple of years) said that the only thing to look for is smelly or dirty water coming out when you start it up. Makes sense, really. On that basis I think you could leave it pickled indefinitely.